{"id":29963,"date":"2026-07-10T10:46:50","date_gmt":"2026-07-10T02:46:50","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=29963"},"modified":"2026-07-10T10:46:59","modified_gmt":"2026-07-10T02:46:59","slug":"pluggable-spd-replacement-how-to-replace-the-module-safely","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/","title":{"rendered":"Pluggable SPD Replacement: How to Replace the Module Safely"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"29963\" class=\"elementor elementor-29963\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ef9438f e-flex e-con-boxed e-con e-parent\" data-id=\"ef9438f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-01a0641 elementor-widget elementor-widget-html\" data-id=\"01a0641\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\r\n\/* =========================================================\r\n   LEEYEE \u2014 PLUGGABLE SPD REPLACEMENT GUIDE\r\n   B2B Technical Article\r\n   Sidebar-safe responsive version\r\n   ========================================================= *\/\r\n\r\n.leeyee-prg,\r\n.leeyee-prg * {\r\n  box-sizing: border-box;\r\n}\r\n\r\n.leeyee-prg {\r\n  --blue: #004898;\r\n  --blue-dark: #00366f;\r\n  --blue-light: #eef6fd;\r\n  --blue-pale: #f7fbff;\r\n  --heading: #14283c;\r\n  --text: #304457;\r\n  --muted: #617283;\r\n  --border: #d8e3ed;\r\n  --warning: #a96800;\r\n  --warning-bg: #fff8ea;\r\n  --danger: #a92d2d;\r\n  --danger-bg: #fff5f5;\r\n  --success: #187044;\r\n  --success-bg: #f2faf6;\r\n  --white: #ffffff;\r\n\r\n  display: block;\r\n  width: 100%;\r\n  max-width: 100%;\r\n  min-width: 0;\r\n  margin: 0;\r\n  padding: 0;\r\n  color: var(--text);\r\n  background: var(--white);\r\n  font-family: Arial, Helvetica, sans-serif;\r\n  font-size: 17px;\r\n  line-height: 1.72;\r\n  overflow-x: hidden;\r\n  overflow-wrap: anywhere;\r\n}\r\n\r\n.leeyee-prg-container {\r\n  display: block;\r\n  width: 100%;\r\n  max-width: 850px;\r\n  min-width: 0;\r\n  margin: 0 auto;\r\n  padding: 0;\r\n}\r\n\r\n.leeyee-prg section,\r\n.leeyee-prg nav,\r\n.leeyee-prg div,\r\n.leeyee-prg table,\r\n.leeyee-prg details,\r\n.leeyee-prg summary {\r\n  min-width: 0;\r\n}\r\n\r\n.leeyee-prg img {\r\n  display: block;\r\n  width: auto;\r\n  max-width: 100%;\r\n  height: auto;\r\n}\r\n\r\n.leeyee-prg a {\r\n  color: var(--blue);\r\n  text-decoration: underline;\r\n  text-decoration-thickness: 1px;\r\n  text-underline-offset: 3px;\r\n}\r\n\r\n.leeyee-prg a:hover {\r\n  color: var(--blue-dark);\r\n}\r\n\r\n.leeyee-prg p {\r\n  margin: 0 0 17px;\r\n}\r\n\r\n.leeyee-prg ul,\r\n.leeyee-prg ol {\r\n  margin: 0 0 21px;\r\n  padding-left: 25px;\r\n}\r\n\r\n.leeyee-prg li {\r\n  margin: 7px 0;\r\n}\r\n\r\n.leeyee-prg strong {\r\n  color: #182d41;\r\n}\r\n\r\n.leeyee-prg h2,\r\n.leeyee-prg h3 {\r\n  max-width: 100%;\r\n  color: var(--heading);\r\n  font-weight: 700;\r\n  letter-spacing: -0.018em;\r\n  overflow-wrap: anywhere;\r\n}\r\n\r\n.leeyee-prg h2 {\r\n  margin: 50px 0 18px;\r\n  padding-top: 3px;\r\n  font-size: 31px;\r\n  line-height: 1.25;\r\n}\r\n\r\n.leeyee-prg h3 {\r\n  margin: 30px 0 11px;\r\n  font-size: 22px;\r\n  line-height: 1.34;\r\n}\r\n\r\n\/* =========================================================\r\n   SIDEBAR AND COLUMN OVERFLOW PROTECTION\r\n   ========================================================= *\/\r\n\r\n.leeyee-prg-intro,\r\n.leeyee-prg-quick,\r\n.leeyee-prg-key-grid,\r\n.leeyee-prg-key-card,\r\n.leeyee-prg-toc,\r\n.leeyee-prg-note,\r\n.leeyee-prg-warning,\r\n.leeyee-prg-danger,\r\n.leeyee-prg-success,\r\n.leeyee-prg-decision,\r\n.leeyee-prg-decision-row,\r\n.leeyee-prg-steps,\r\n.leeyee-prg-step,\r\n.leeyee-prg-table-wrap,\r\n.leeyee-prg-checklist,\r\n.leeyee-prg-check-grid,\r\n.leeyee-prg-check,\r\n.leeyee-prg-cta,\r\n.leeyee-prg-actions,\r\n.leeyee-prg-faq,\r\n.leeyee-prg-related,\r\n.leeyee-prg-related-grid,\r\n.leeyee-prg-related-link,\r\n.leeyee-prg-disclaimer {\r\n  width: 100%;\r\n  max-width: 100%;\r\n  min-width: 0;\r\n}\r\n\r\n\/* Intro *\/\r\n\r\n.leeyee-prg-intro {\r\n  margin: 0 0 26px;\r\n}\r\n\r\n.leeyee-prg-eyebrow {\r\n  display: inline-flex;\r\n  align-items: center;\r\n  gap: 8px;\r\n  width: auto;\r\n  max-width: 100%;\r\n  margin: 0 0 14px;\r\n  padding: 6px 11px;\r\n  border: 1px solid #bed5e9;\r\n  border-radius: 999px;\r\n  color: var(--blue);\r\n  background: var(--blue-pale);\r\n  font-size: 13px;\r\n  line-height: 1.2;\r\n  font-weight: 800;\r\n  letter-spacing: 0.04em;\r\n  text-transform: uppercase;\r\n  white-space: normal;\r\n}\r\n\r\n.leeyee-prg-eyebrow::before {\r\n  content: \"\";\r\n  flex: 0 0 auto;\r\n  width: 7px;\r\n  height: 7px;\r\n  border-radius: 50%;\r\n  background: var(--blue);\r\n}\r\n\r\n.leeyee-prg-intro p:first-of-type {\r\n  color: var(--heading);\r\n  font-size: 20px;\r\n  line-height: 1.62;\r\n}\r\n\r\n\/* Quick answer *\/\r\n\r\n.leeyee-prg-quick {\r\n  margin: 28px 0 31px;\r\n  padding: 26px 28px;\r\n  border: 1px solid #bad3e9;\r\n  border-left: 5px solid var(--blue);\r\n  border-radius: 12px;\r\n  background: var(--blue-pale);\r\n  overflow: hidden;\r\n}\r\n\r\n.leeyee-prg-label {\r\n  display: block;\r\n  max-width: 100%;\r\n  margin: 0 0 8px;\r\n  color: var(--blue);\r\n  font-size: 14px;\r\n  line-height: 1.25;\r\n  font-weight: 800;\r\n  letter-spacing: 0.045em;\r\n  text-transform: uppercase;\r\n}\r\n\r\n.leeyee-prg-quick p {\r\n  margin: 0;\r\n  color: #263c50;\r\n  font-size: 18px;\r\n  line-height: 1.66;\r\n}\r\n\r\n\/* Key answer grid *\/\r\n\r\n.leeyee-prg-key-grid {\r\n  display: grid;\r\n  grid-template-columns: repeat(3, minmax(0, 1fr));\r\n  gap: 14px;\r\n  margin: 25px 0 35px;\r\n}\r\n\r\n.leeyee-prg-key-card {\r\n  padding: 20px 18px;\r\n  border: 1px solid var(--border);\r\n  border-radius: 10px;\r\n  background: #fff;\r\n  overflow: hidden;\r\n}\r\n\r\n.leeyee-prg-key-card > span {\r\n  display: flex;\r\n  align-items: center;\r\n  justify-content: center;\r\n  width: 33px;\r\n  height: 33px;\r\n  max-width: 33px;\r\n  margin-bottom: 11px;\r\n  border-radius: 50%;\r\n  color: #fff;\r\n  background: var(--blue);\r\n  font-size: 15px;\r\n  line-height: 1;\r\n  font-weight: 800;\r\n}\r\n\r\n.leeyee-prg-key-card strong {\r\n  display: block;\r\n  margin-bottom: 5px;\r\n  font-size: 17px;\r\n}\r\n\r\n.leeyee-prg-key-card p {\r\n  margin: 0;\r\n  color: var(--muted);\r\n  font-size: 15px;\r\n  line-height: 1.55;\r\n}\r\n\r\n\/* TOC *\/\r\n\r\n.leeyee-prg-toc {\r\n  margin: 31px 0 42px;\r\n  padding: 24px 26px;\r\n  border: 1px solid var(--border);\r\n  border-radius: 11px;\r\n  background: #fbfdff;\r\n  overflow: hidden;\r\n}\r\n\r\n.leeyee-prg-toc > strong {\r\n  display: block;\r\n  margin-bottom: 12px;\r\n  font-size: 18px;\r\n}\r\n\r\n.leeyee-prg-toc ol {\r\n  display: grid;\r\n  grid-template-columns: repeat(2, minmax(0, 1fr));\r\n  gap: 7px 32px;\r\n  margin: 0;\r\n  padding-left: 22px;\r\n}\r\n\r\n.leeyee-prg-toc li {\r\n  min-width: 0;\r\n  margin: 0;\r\n}\r\n\r\n.leeyee-prg-toc a {\r\n  color: #334e66;\r\n  text-decoration: none;\r\n  overflow-wrap: anywhere;\r\n}\r\n\r\n.leeyee-prg-toc a:hover {\r\n  color: var(--blue);\r\n  text-decoration: underline;\r\n}\r\n\r\n\/* Callouts *\/\r\n\r\n.leeyee-prg-note,\r\n.leeyee-prg-warning,\r\n.leeyee-prg-danger,\r\n.leeyee-prg-success {\r\n  margin: 24px 0;\r\n  padding: 21px 22px;\r\n  border-radius: 10px;\r\n  overflow: hidden;\r\n}\r\n\r\n.leeyee-prg-note {\r\n  border: 1px solid #c7dcec;\r\n  border-left: 4px solid var(--blue);\r\n  background: var(--blue-pale);\r\n}\r\n\r\n.leeyee-prg-warning {\r\n  border: 1px solid #e9d1a2;\r\n  border-left: 4px solid #be7800;\r\n  background: var(--warning-bg);\r\n}\r\n\r\n.leeyee-prg-danger {\r\n  border: 1px solid #ebc5c5;\r\n  border-left: 4px solid var(--danger);\r\n  background: var(--danger-bg);\r\n}\r\n\r\n.leeyee-prg-success {\r\n  border: 1px solid #baddc8;\r\n  border-left: 4px solid var(--success);\r\n  background: var(--success-bg);\r\n}\r\n\r\n.leeyee-prg-note strong,\r\n.leeyee-prg-warning strong,\r\n.leeyee-prg-danger strong,\r\n.leeyee-prg-success strong {\r\n  display: block;\r\n  margin-bottom: 6px;\r\n}\r\n\r\n.leeyee-prg-note p:last-child,\r\n.leeyee-prg-warning p:last-child,\r\n.leeyee-prg-danger p:last-child,\r\n.leeyee-prg-success p:last-child {\r\n  margin-bottom: 0;\r\n}\r\n\r\n\/* Decision block *\/\r\n\r\n.leeyee-prg-decision {\r\n  margin: 25px 0 34px;\r\n  padding: 25px;\r\n  border: 1px solid var(--border);\r\n  border-radius: 11px;\r\n  background: #fbfdff;\r\n  overflow: hidden;\r\n}\r\n\r\n.leeyee-prg-decision > strong {\r\n  display: block;\r\n  margin-bottom: 17px;\r\n  font-size: 20px;\r\n}\r\n\r\n.leeyee-prg-decision-row {\r\n  display: grid;\r\n  grid-template-columns: minmax(145px, 185px) minmax(0, 1fr);\r\n  gap: 18px;\r\n  padding: 15px 0;\r\n  border-top: 1px solid #e2eaf1;\r\n}\r\n\r\n.leeyee-prg-decision-row:first-of-type {\r\n  padding-top: 0;\r\n  border-top: 0;\r\n}\r\n\r\n.leeyee-prg-decision-row strong {\r\n  color: var(--heading);\r\n}\r\n\r\n\/* Steps *\/\r\n\r\n.leeyee-prg-steps {\r\n  margin: 27px 0 36px;\r\n  counter-reset: replacement-step;\r\n}\r\n\r\n.leeyee-prg-step {\r\n  position: relative;\r\n  margin: 0 0 15px;\r\n  padding: 23px 23px 22px 74px;\r\n  border: 1px solid var(--border);\r\n  border-radius: 11px;\r\n  background: #fff;\r\n  counter-increment: replacement-step;\r\n  overflow: hidden;\r\n}\r\n\r\n.leeyee-prg-step::before {\r\n  content: counter(replacement-step);\r\n  position: absolute;\r\n  top: 22px;\r\n  left: 22px;\r\n  display: flex;\r\n  align-items: center;\r\n  justify-content: center;\r\n  width: 36px;\r\n  height: 36px;\r\n  border-radius: 50%;\r\n  color: #fff;\r\n  background: var(--blue);\r\n  font-size: 16px;\r\n  line-height: 1;\r\n  font-weight: 800;\r\n}\r\n\r\n.leeyee-prg-step h3 {\r\n  margin: 0 0 8px;\r\n  font-size: 20px;\r\n}\r\n\r\n.leeyee-prg-step p:last-child,\r\n.leeyee-prg-step ul:last-child {\r\n  margin-bottom: 0;\r\n}\r\n\r\n\/* Tables *\/\r\n\r\n.leeyee-prg-table-wrap {\r\n  display: block;\r\n  margin: 22px 0 29px;\r\n  overflow-x: auto;\r\n  overflow-y: hidden;\r\n  border: 1px solid var(--border);\r\n  border-radius: 10px;\r\n  background: #fff;\r\n  -webkit-overflow-scrolling: touch;\r\n  overscroll-behavior-x: contain;\r\n}\r\n\r\n.leeyee-prg-table {\r\n  width: 100%;\r\n  min-width: 720px;\r\n  max-width: none;\r\n  margin: 0;\r\n  border-collapse: collapse;\r\n  table-layout: auto;\r\n}\r\n\r\n.leeyee-prg-table th,\r\n.leeyee-prg-table td {\r\n  padding: 14px 15px;\r\n  border-right: 1px solid #e2eaf1;\r\n  border-bottom: 1px solid #e2eaf1;\r\n  text-align: left;\r\n  vertical-align: top;\r\n  line-height: 1.52;\r\n  overflow-wrap: normal;\r\n  word-break: normal;\r\n}\r\n\r\n.leeyee-prg-table th:last-child,\r\n.leeyee-prg-table td:last-child {\r\n  border-right: 0;\r\n}\r\n\r\n.leeyee-prg-table tbody tr:last-child td {\r\n  border-bottom: 0;\r\n}\r\n\r\n.leeyee-prg-table th {\r\n  color: #fff;\r\n  background: var(--blue);\r\n  font-size: 15px;\r\n  font-weight: 700;\r\n}\r\n\r\n.leeyee-prg-table td {\r\n  color: #33485b;\r\n  font-size: 15.5px;\r\n}\r\n\r\n.leeyee-prg-table tbody tr:nth-child(even) td {\r\n  background: #f8fbfe;\r\n}\r\n\r\n.leeyee-prg-table td:first-child {\r\n  color: var(--heading);\r\n  font-weight: 700;\r\n}\r\n\r\n.leeyee-prg-scroll-hint {\r\n  display: none;\r\n  margin: -18px 0 23px;\r\n  color: var(--muted);\r\n  font-size: 13px;\r\n}\r\n\r\n\/* Checklist *\/\r\n\r\n.leeyee-prg-checklist {\r\n  margin: 24px 0 33px;\r\n  padding: 24px;\r\n  border: 1px solid var(--border);\r\n  border-radius: 11px;\r\n  background: #fbfdff;\r\n  overflow: hidden;\r\n}\r\n\r\n.leeyee-prg-checklist > strong {\r\n  display: block;\r\n  margin-bottom: 13px;\r\n  font-size: 19px;\r\n}\r\n\r\n.leeyee-prg-check-grid {\r\n  display: grid;\r\n  grid-template-columns: repeat(2, minmax(0, 1fr));\r\n  gap: 7px 24px;\r\n}\r\n\r\n.leeyee-prg-check {\r\n  position: relative;\r\n  padding: 8px 0 8px 28px;\r\n  line-height: 1.5;\r\n}\r\n\r\n.leeyee-prg-check::before {\r\n  content: \"\u2713\";\r\n  position: absolute;\r\n  top: 8px;\r\n  left: 0;\r\n  display: flex;\r\n  align-items: center;\r\n  justify-content: center;\r\n  width: 19px;\r\n  height: 19px;\r\n  border-radius: 50%;\r\n  color: #fff;\r\n  background: var(--blue);\r\n  font-size: 12px;\r\n  line-height: 1;\r\n  font-weight: 800;\r\n}\r\n\r\n\/* CTA *\/\r\n\r\n.leeyee-prg-cta {\r\n  margin: 41px 0;\r\n  padding: 27px 29px;\r\n  border: 1px solid #bed5e9;\r\n  border-radius: 13px;\r\n  background: linear-gradient(135deg, #f8fbff 0%, #edf5fd 100%);\r\n  overflow: hidden;\r\n}\r\n\r\n.leeyee-prg-cta h2 {\r\n  margin: 0 0 9px;\r\n  font-size: 27px;\r\n}\r\n\r\n.leeyee-prg-cta p {\r\n  margin-bottom: 18px;\r\n  color: #405467;\r\n}\r\n\r\n.leeyee-prg-actions {\r\n  display: flex;\r\n  flex-wrap: wrap;\r\n  gap: 11px;\r\n}\r\n\r\n.leeyee-prg-btn,\r\n.leeyee-prg-btn:link,\r\n.leeyee-prg-btn:visited,\r\n.leeyee-prg-btn:hover,\r\n.leeyee-prg-btn:focus,\r\n.leeyee-prg-btn:active {\r\n  display: inline-flex !important;\r\n  align-items: center;\r\n  justify-content: center;\r\n  width: auto;\r\n  max-width: 100%;\r\n  min-width: 215px;\r\n  min-height: 46px;\r\n  padding: 12px 20px;\r\n  border: 2px solid var(--blue);\r\n  border-radius: 6px;\r\n  font-size: 15px;\r\n  line-height: 1.25;\r\n  font-weight: 700;\r\n  text-align: center;\r\n  text-decoration: none !important;\r\n  white-space: normal;\r\n  cursor: pointer;\r\n  opacity: 1 !important;\r\n  visibility: visible !important;\r\n}\r\n\r\n.leeyee-prg-btn-primary,\r\n.leeyee-prg-btn-primary:link,\r\n.leeyee-prg-btn-primary:visited {\r\n  color: #fff !important;\r\n  background: var(--blue) !important;\r\n}\r\n\r\n.leeyee-prg-btn-primary:hover,\r\n.leeyee-prg-btn-primary:focus {\r\n  color: #fff !important;\r\n  background: var(--blue-dark) !important;\r\n  border-color: var(--blue-dark) !important;\r\n}\r\n\r\n.leeyee-prg-btn-secondary,\r\n.leeyee-prg-btn-secondary:link,\r\n.leeyee-prg-btn-secondary:visited {\r\n  color: var(--blue) !important;\r\n  background: #fff !important;\r\n}\r\n\r\n.leeyee-prg-btn-secondary:hover,\r\n.leeyee-prg-btn-secondary:focus {\r\n  color: var(--blue-dark) !important;\r\n  background: #f2f7fc !important;\r\n  border-color: var(--blue-dark) !important;\r\n}\r\n\r\n.leeyee-prg-btn span,\r\n.leeyee-prg-btn:link span,\r\n.leeyee-prg-btn:visited span,\r\n.leeyee-prg-btn:hover span,\r\n.leeyee-prg-btn:focus span,\r\n.leeyee-prg-btn:active span {\r\n  display: inline-block !important;\r\n  max-width: 100% !important;\r\n  color: inherit !important;\r\n  font-size: inherit !important;\r\n  line-height: 1.25 !important;\r\n  font-weight: 700 !important;\r\n  white-space: normal !important;\r\n  opacity: 1 !important;\r\n  visibility: visible !important;\r\n}\r\n\r\n\/* FAQ *\/\r\n\r\n.leeyee-prg-faq {\r\n  margin: 22px 0 41px;\r\n  border-top: 1px solid var(--border);\r\n}\r\n\r\n.leeyee-prg-faq details {\r\n  width: 100%;\r\n  max-width: 100%;\r\n  border-bottom: 1px solid var(--border);\r\n}\r\n\r\n.leeyee-prg-faq summary {\r\n  position: relative;\r\n  width: 100%;\r\n  max-width: 100%;\r\n  padding: 19px 42px 19px 0;\r\n  color: var(--heading);\r\n  font-size: 18px;\r\n  line-height: 1.45;\r\n  font-weight: 700;\r\n  cursor: pointer;\r\n  list-style: none;\r\n  overflow-wrap: anywhere;\r\n}\r\n\r\n.leeyee-prg-faq summary::-webkit-details-marker {\r\n  display: none;\r\n}\r\n\r\n.leeyee-prg-faq summary::after {\r\n  content: \"+\";\r\n  position: absolute;\r\n  top: 15px;\r\n  right: 4px;\r\n  color: var(--blue);\r\n  font-size: 27px;\r\n  line-height: 1;\r\n  font-weight: 400;\r\n}\r\n\r\n.leeyee-prg-faq details[open] summary::after {\r\n  content: \"\u2212\";\r\n}\r\n\r\n.leeyee-prg-faq-answer {\r\n  width: 100%;\r\n  max-width: 100%;\r\n  padding: 0 42px 18px 0;\r\n  color: #405467;\r\n}\r\n\r\n.leeyee-prg-faq-answer p:last-child {\r\n  margin-bottom: 0;\r\n}\r\n\r\n\/* Related *\/\r\n\r\n.leeyee-prg-related {\r\n  margin: 38px 0 28px;\r\n  padding-top: 24px;\r\n  border-top: 1px solid var(--border);\r\n}\r\n\r\n.leeyee-prg-related h2 {\r\n  margin-top: 0;\r\n  font-size: 27px;\r\n}\r\n\r\n.leeyee-prg-related-grid {\r\n  display: grid;\r\n  grid-template-columns: repeat(2, minmax(0, 1fr));\r\n  gap: 13px;\r\n}\r\n\r\n.leeyee-prg-related-link {\r\n  display: block;\r\n  padding: 16px 17px;\r\n  border: 1px solid var(--border);\r\n  border-radius: 9px;\r\n  color: #294760 !important;\r\n  background: #fff;\r\n  text-decoration: none !important;\r\n  overflow: hidden;\r\n}\r\n\r\n.leeyee-prg-related-link:hover {\r\n  border-color: #aac9e3;\r\n  color: var(--blue) !important;\r\n  background: #f8fbff;\r\n}\r\n\r\n.leeyee-prg-related-link strong {\r\n  display: block;\r\n  margin-bottom: 3px;\r\n  color: inherit;\r\n  font-size: 16px;\r\n}\r\n\r\n.leeyee-prg-related-link span {\r\n  display: block;\r\n  color: var(--muted);\r\n  font-size: 14px;\r\n  line-height: 1.5;\r\n}\r\n\r\n.leeyee-prg-disclaimer {\r\n  margin: 31px 0 15px;\r\n  padding-top: 19px;\r\n  border-top: 1px solid #e4ebf1;\r\n  color: #687988;\r\n  font-size: 13.5px;\r\n  line-height: 1.6;\r\n}\r\n\r\n\/* =========================================================\r\n   DESKTOP 1440+\r\n   Important: no fixed width larger than parent column\r\n   ========================================================= *\/\r\n\r\n@media (min-width: 1440px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg {\r\n    font-size: 17px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    font-size: 31px;\r\n  }\r\n}\r\n\r\n\/* Desktop 1366 *\/\r\n\r\n@media (min-width: 1366px) and (max-width: 1439px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    font-size: 31px;\r\n  }\r\n}\r\n\r\n\/* Desktop 1280 *\/\r\n\r\n@media (min-width: 1280px) and (max-width: 1365px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    font-size: 30px;\r\n  }\r\n\r\n  .leeyee-prg-key-grid {\r\n    gap: 12px;\r\n  }\r\n}\r\n\r\n\/* Tablet landscape 1024 *\/\r\n\r\n@media (min-width: 1024px) and (max-width: 1279px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg-key-grid {\r\n    gap: 12px;\r\n  }\r\n\r\n  .leeyee-prg-quick {\r\n    padding: 24px 25px;\r\n  }\r\n}\r\n\r\n\/* Tablet 912 *\/\r\n\r\n@media (min-width: 912px) and (max-width: 1023px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg {\r\n    font-size: 16.5px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    font-size: 29px;\r\n  }\r\n\r\n  .leeyee-prg-key-grid {\r\n    grid-template-columns: repeat(3, minmax(0, 1fr));\r\n  }\r\n}\r\n\r\n\/* Tablet 820 *\/\r\n\r\n@media (min-width: 820px) and (max-width: 911px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    font-size: 28px;\r\n  }\r\n\r\n  .leeyee-prg-key-grid {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-key-card {\r\n    display: grid;\r\n    grid-template-columns: 40px minmax(0, 1fr);\r\n    column-gap: 13px;\r\n  }\r\n\r\n  .leeyee-prg-key-card > span {\r\n    grid-row: 1 \/ 3;\r\n    margin-bottom: 0;\r\n  }\r\n}\r\n\r\n\/* Tablet 768 *\/\r\n\r\n@media (min-width: 768px) and (max-width: 819px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg {\r\n    font-size: 16.5px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    margin-top: 45px;\r\n    font-size: 27px;\r\n  }\r\n\r\n  .leeyee-prg h3 {\r\n    font-size: 21px;\r\n  }\r\n\r\n  .leeyee-prg-toc ol,\r\n  .leeyee-prg-key-grid,\r\n  .leeyee-prg-check-grid,\r\n  .leeyee-prg-related-grid {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-decision-row {\r\n    grid-template-columns: minmax(145px, 175px) minmax(0, 1fr);\r\n  }\r\n}\r\n\r\n\/* Small tablet 600 *\/\r\n\r\n@media (min-width: 600px) and (max-width: 767px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg {\r\n    font-size: 16px;\r\n    line-height: 1.68;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    margin-top: 42px;\r\n    font-size: 26px;\r\n  }\r\n\r\n  .leeyee-prg h3 {\r\n    font-size: 20.5px;\r\n  }\r\n\r\n  .leeyee-prg-toc ol,\r\n  .leeyee-prg-key-grid,\r\n  .leeyee-prg-check-grid,\r\n  .leeyee-prg-related-grid {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-decision-row {\r\n    grid-template-columns: 1fr;\r\n    gap: 4px;\r\n  }\r\n\r\n  .leeyee-prg-table {\r\n    min-width: 680px;\r\n  }\r\n\r\n  .leeyee-prg-scroll-hint {\r\n    display: block;\r\n  }\r\n}\r\n\r\n\/* Mobile 540 *\/\r\n\r\n@media (min-width: 540px) and (max-width: 599px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg {\r\n    font-size: 16px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    margin-top: 40px;\r\n    font-size: 25px;\r\n  }\r\n\r\n  .leeyee-prg-quick,\r\n  .leeyee-prg-toc,\r\n  .leeyee-prg-decision,\r\n  .leeyee-prg-checklist,\r\n  .leeyee-prg-cta {\r\n    padding: 21px;\r\n  }\r\n\r\n  .leeyee-prg-toc ol,\r\n  .leeyee-prg-key-grid,\r\n  .leeyee-prg-check-grid,\r\n  .leeyee-prg-related-grid {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-decision-row {\r\n    grid-template-columns: 1fr;\r\n    gap: 4px;\r\n  }\r\n\r\n  .leeyee-prg-table {\r\n    min-width: 670px;\r\n  }\r\n\r\n  .leeyee-prg-scroll-hint {\r\n    display: block;\r\n  }\r\n}\r\n\r\n\/* Mobile 480 *\/\r\n\r\n@media (min-width: 480px) and (max-width: 539px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg {\r\n    font-size: 16px;\r\n  }\r\n\r\n  .leeyee-prg-intro p:first-of-type {\r\n    font-size: 18px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    margin-top: 39px;\r\n    font-size: 24.5px;\r\n  }\r\n\r\n  .leeyee-prg-quick,\r\n  .leeyee-prg-toc,\r\n  .leeyee-prg-decision,\r\n  .leeyee-prg-checklist,\r\n  .leeyee-prg-cta {\r\n    padding: 20px;\r\n  }\r\n\r\n  .leeyee-prg-toc ol,\r\n  .leeyee-prg-key-grid,\r\n  .leeyee-prg-check-grid,\r\n  .leeyee-prg-related-grid {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-decision-row {\r\n    grid-template-columns: 1fr;\r\n    gap: 4px;\r\n  }\r\n\r\n  .leeyee-prg-step {\r\n    padding: 62px 19px 20px;\r\n  }\r\n\r\n  .leeyee-prg-step::before {\r\n    top: 18px;\r\n    left: 19px;\r\n  }\r\n\r\n  .leeyee-prg-actions {\r\n    display: grid;\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-btn {\r\n    width: 100% !important;\r\n    max-width: 100%;\r\n    min-width: 0;\r\n  }\r\n\r\n  .leeyee-prg-table {\r\n    min-width: 660px;\r\n  }\r\n\r\n  .leeyee-prg-scroll-hint {\r\n    display: block;\r\n  }\r\n}\r\n\r\n\/* Mobile 430 *\/\r\n\r\n@media (min-width: 430px) and (max-width: 479px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg {\r\n    font-size: 15.8px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    margin-top: 38px;\r\n    font-size: 24px;\r\n  }\r\n\r\n  .leeyee-prg h3 {\r\n    font-size: 19.5px;\r\n  }\r\n\r\n  .leeyee-prg-quick,\r\n  .leeyee-prg-toc,\r\n  .leeyee-prg-decision,\r\n  .leeyee-prg-checklist,\r\n  .leeyee-prg-cta {\r\n    padding: 19px;\r\n  }\r\n\r\n  .leeyee-prg-toc ol,\r\n  .leeyee-prg-key-grid,\r\n  .leeyee-prg-check-grid,\r\n  .leeyee-prg-related-grid {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-decision-row {\r\n    grid-template-columns: 1fr;\r\n    gap: 4px;\r\n  }\r\n\r\n  .leeyee-prg-step {\r\n    padding: 60px 18px 19px;\r\n  }\r\n\r\n  .leeyee-prg-step::before {\r\n    top: 17px;\r\n    left: 18px;\r\n  }\r\n\r\n  .leeyee-prg-actions {\r\n    display: grid;\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-btn {\r\n    width: 100% !important;\r\n    min-width: 0;\r\n  }\r\n\r\n  .leeyee-prg-table {\r\n    min-width: 650px;\r\n  }\r\n\r\n  .leeyee-prg-scroll-hint {\r\n    display: block;\r\n  }\r\n}\r\n\r\n\/* Mobile 414 *\/\r\n\r\n@media (min-width: 414px) and (max-width: 429px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg {\r\n    font-size: 15.7px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    font-size: 23.5px;\r\n  }\r\n\r\n  .leeyee-prg-quick,\r\n  .leeyee-prg-toc,\r\n  .leeyee-prg-decision,\r\n  .leeyee-prg-checklist,\r\n  .leeyee-prg-cta {\r\n    padding: 18px;\r\n  }\r\n\r\n  .leeyee-prg-toc ol,\r\n  .leeyee-prg-key-grid,\r\n  .leeyee-prg-check-grid,\r\n  .leeyee-prg-related-grid {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-decision-row {\r\n    grid-template-columns: 1fr;\r\n    gap: 4px;\r\n  }\r\n\r\n  .leeyee-prg-step {\r\n    padding: 59px 17px 18px;\r\n  }\r\n\r\n  .leeyee-prg-step::before {\r\n    top: 16px;\r\n    left: 17px;\r\n  }\r\n\r\n  .leeyee-prg-actions {\r\n    display: grid;\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-btn {\r\n    width: 100% !important;\r\n    min-width: 0;\r\n  }\r\n\r\n  .leeyee-prg-table {\r\n    min-width: 645px;\r\n  }\r\n\r\n  .leeyee-prg-scroll-hint {\r\n    display: block;\r\n  }\r\n}\r\n\r\n\/* Mobile 390 *\/\r\n\r\n@media (min-width: 390px) and (max-width: 413px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg {\r\n    font-size: 15.5px;\r\n  }\r\n\r\n  .leeyee-prg-intro p:first-of-type {\r\n    font-size: 17.3px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    margin-top: 36px;\r\n    font-size: 23px;\r\n  }\r\n\r\n  .leeyee-prg h3 {\r\n    font-size: 19px;\r\n  }\r\n\r\n  .leeyee-prg-quick,\r\n  .leeyee-prg-toc,\r\n  .leeyee-prg-decision,\r\n  .leeyee-prg-checklist,\r\n  .leeyee-prg-cta,\r\n  .leeyee-prg-note,\r\n  .leeyee-prg-warning,\r\n  .leeyee-prg-danger,\r\n  .leeyee-prg-success {\r\n    padding: 17px;\r\n  }\r\n\r\n  .leeyee-prg-toc ol,\r\n  .leeyee-prg-key-grid,\r\n  .leeyee-prg-check-grid,\r\n  .leeyee-prg-related-grid {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-decision-row {\r\n    grid-template-columns: 1fr;\r\n    gap: 4px;\r\n  }\r\n\r\n  .leeyee-prg-step {\r\n    padding: 58px 16px 17px;\r\n  }\r\n\r\n  .leeyee-prg-step::before {\r\n    top: 15px;\r\n    left: 16px;\r\n  }\r\n\r\n  .leeyee-prg-actions {\r\n    display: grid;\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-btn {\r\n    width: 100% !important;\r\n    min-width: 0;\r\n  }\r\n\r\n  .leeyee-prg-table {\r\n    min-width: 640px;\r\n  }\r\n\r\n  .leeyee-prg-scroll-hint {\r\n    display: block;\r\n  }\r\n}\r\n\r\n\/* Mobile 375 *\/\r\n\r\n@media (min-width: 375px) and (max-width: 389px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg {\r\n    font-size: 15.4px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    font-size: 22.5px;\r\n  }\r\n\r\n  .leeyee-prg-quick,\r\n  .leeyee-prg-toc,\r\n  .leeyee-prg-decision,\r\n  .leeyee-prg-checklist,\r\n  .leeyee-prg-cta,\r\n  .leeyee-prg-note,\r\n  .leeyee-prg-warning,\r\n  .leeyee-prg-danger,\r\n  .leeyee-prg-success {\r\n    padding: 16px;\r\n  }\r\n\r\n  .leeyee-prg-toc ol,\r\n  .leeyee-prg-key-grid,\r\n  .leeyee-prg-check-grid,\r\n  .leeyee-prg-related-grid {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-decision-row {\r\n    grid-template-columns: 1fr;\r\n    gap: 4px;\r\n  }\r\n\r\n  .leeyee-prg-step {\r\n    padding: 57px 15px 16px;\r\n  }\r\n\r\n  .leeyee-prg-step::before {\r\n    top: 14px;\r\n    left: 15px;\r\n  }\r\n\r\n  .leeyee-prg-actions {\r\n    display: grid;\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-btn {\r\n    width: 100% !important;\r\n    min-width: 0;\r\n  }\r\n\r\n  .leeyee-prg-table {\r\n    min-width: 635px;\r\n  }\r\n\r\n  .leeyee-prg-scroll-hint {\r\n    display: block;\r\n  }\r\n}\r\n\r\n\/* Mobile 360 *\/\r\n\r\n@media (min-width: 360px) and (max-width: 374px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg {\r\n    font-size: 15.2px;\r\n  }\r\n\r\n  .leeyee-prg-intro p:first-of-type {\r\n    font-size: 16.9px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    font-size: 22px;\r\n  }\r\n\r\n  .leeyee-prg h3 {\r\n    font-size: 18.5px;\r\n  }\r\n\r\n  .leeyee-prg-quick,\r\n  .leeyee-prg-toc,\r\n  .leeyee-prg-decision,\r\n  .leeyee-prg-checklist,\r\n  .leeyee-prg-cta,\r\n  .leeyee-prg-note,\r\n  .leeyee-prg-warning,\r\n  .leeyee-prg-danger,\r\n  .leeyee-prg-success {\r\n    padding: 15px;\r\n  }\r\n\r\n  .leeyee-prg-toc ol,\r\n  .leeyee-prg-key-grid,\r\n  .leeyee-prg-check-grid,\r\n  .leeyee-prg-related-grid {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-decision-row {\r\n    grid-template-columns: 1fr;\r\n    gap: 4px;\r\n  }\r\n\r\n  .leeyee-prg-step {\r\n    padding: 56px 14px 15px;\r\n  }\r\n\r\n  .leeyee-prg-step::before {\r\n    top: 13px;\r\n    left: 14px;\r\n  }\r\n\r\n  .leeyee-prg-actions {\r\n    display: grid;\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-btn {\r\n    width: 100% !important;\r\n    min-width: 0;\r\n    padding: 11px 13px;\r\n  }\r\n\r\n  .leeyee-prg-table {\r\n    min-width: 630px;\r\n  }\r\n\r\n  .leeyee-prg-scroll-hint {\r\n    display: block;\r\n  }\r\n}\r\n\r\n\/* Mobile 320 *\/\r\n\r\n@media (max-width: 359px) {\r\n  .leeyee-prg-container {\r\n    width: 100%;\r\n    max-width: 850px;\r\n  }\r\n\r\n  .leeyee-prg {\r\n    font-size: 15px;\r\n    line-height: 1.64;\r\n  }\r\n\r\n  .leeyee-prg-eyebrow {\r\n    font-size: 11.5px;\r\n  }\r\n\r\n  .leeyee-prg-intro p:first-of-type {\r\n    font-size: 16.5px;\r\n  }\r\n\r\n  .leeyee-prg h2 {\r\n    margin-top: 34px;\r\n    font-size: 21px;\r\n  }\r\n\r\n  .leeyee-prg h3 {\r\n    font-size: 18px;\r\n  }\r\n\r\n  .leeyee-prg-quick,\r\n  .leeyee-prg-toc,\r\n  .leeyee-prg-decision,\r\n  .leeyee-prg-checklist,\r\n  .leeyee-prg-cta,\r\n  .leeyee-prg-note,\r\n  .leeyee-prg-warning,\r\n  .leeyee-prg-danger,\r\n  .leeyee-prg-success {\r\n    padding: 14px;\r\n  }\r\n\r\n  .leeyee-prg-toc ol,\r\n  .leeyee-prg-key-grid,\r\n  .leeyee-prg-check-grid,\r\n  .leeyee-prg-related-grid {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-decision-row {\r\n    grid-template-columns: 1fr;\r\n    gap: 4px;\r\n  }\r\n\r\n  .leeyee-prg-step {\r\n    padding: 54px 13px 14px;\r\n  }\r\n\r\n  .leeyee-prg-step::before {\r\n    top: 12px;\r\n    left: 13px;\r\n    width: 34px;\r\n    height: 34px;\r\n  }\r\n\r\n  .leeyee-prg-table {\r\n    min-width: 620px;\r\n  }\r\n\r\n  .leeyee-prg-table th,\r\n  .leeyee-prg-table td {\r\n    padding: 12px;\r\n    font-size: 14px;\r\n  }\r\n\r\n  .leeyee-prg-actions {\r\n    display: grid;\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  .leeyee-prg-btn {\r\n    width: 100% !important;\r\n    min-width: 0;\r\n    padding: 10px 11px;\r\n  }\r\n\r\n  .leeyee-prg-faq summary {\r\n    padding-right: 34px;\r\n    font-size: 16.5px;\r\n  }\r\n\r\n  .leeyee-prg-faq-answer {\r\n    padding-right: 24px;\r\n  }\r\n\r\n  .leeyee-prg-scroll-hint {\r\n    display: block;\r\n  }\r\n}\r\n<\/style>\r\n\r\n<article class=\"leeyee-prg\">\r\n  <div class=\"leeyee-prg-container\">\r\n\r\n    <section class=\"leeyee-prg-intro\">\r\n      <span class=\"leeyee-prg-eyebrow\">Pluggable SPD Replacement Guide<\/span>\r\n\r\n      <p>\r\n        In many pluggable SPDs, the removable protection module can be replaced without disconnecting and rewiring the base\u2014but only when the existing base is undamaged and the replacement cartridge is fully compatible.\r\n      <\/p>\r\n\r\n      <p>\r\n        The correct procedure is to isolate the relevant circuit, verify absence of voltage, record the original module, remove it according to the manufacturer\u2019s release mechanism, inspect the base, install the matched replacement and confirm the local and remote status.\r\n      <\/p>\r\n\r\n      <p>\r\n        This guide focuses on <strong>how to replace a pluggable SPD module<\/strong>. For guidance on failure indicators and deciding when a cartridge has reached end of life, see the\r\n        <a href=\"https:\/\/www.cnspd.com\/spd-cartridge-replacement\/\">SPD Cartridge Replacement Guide<\/a>.\r\n      <\/p>\r\n    <\/section>\r\n\r\n    <section class=\"leeyee-prg-quick\" aria-label=\"Quick answer\">\r\n      <span class=\"leeyee-prg-label\">Quick Answer<\/span>\r\n      <p>\r\n        De-energize the relevant circuit and verify absence of voltage unless the exact manufacturer documentation and approved site procedure explicitly permit another method. Record the original model and pole position, release and remove the cartridge as instructed, inspect the base and terminals, compare the complete electrical and mechanical specification, insert the compatible replacement fully, then verify the indicator and remote alarm.\r\n      <\/p>\r\n    <\/section>\r\n\r\n    <div class=\"leeyee-prg-key-grid\">\r\n      <div class=\"leeyee-prg-key-card\">\r\n        <span>1<\/span>\r\n        <strong>Isolate Safely<\/strong>\r\n        <p>\u201cPluggable\u201d describes the construction. It does not automatically mean hot-swappable.<\/p>\r\n      <\/div>\r\n\r\n      <div class=\"leeyee-prg-key-card\">\r\n        <span>2<\/span>\r\n        <strong>Match the Full Specification<\/strong>\r\n        <p>Do not select a replacement only by its housing shape, color or Imax value.<\/p>\r\n      <\/div>\r\n\r\n      <div class=\"leeyee-prg-key-card\">\r\n        <span>3<\/span>\r\n        <strong>Inspect the Base<\/strong>\r\n        <p>A new cartridge cannot correct burned contacts, loose terminals or a damaged latch.<\/p>\r\n      <\/div>\r\n    <\/div>\r\n\r\n    <nav class=\"leeyee-prg-toc\" aria-label=\"Table of contents\">\r\n      <strong>In This Guide<\/strong>\r\n      <ol>\r\n        <li><a href=\"#replace-only-module\">Can only the module be replaced?<\/a><\/li>\r\n        <li><a href=\"#replacement-procedure\">Step-by-step replacement procedure<\/a><\/li>\r\n        <li><a href=\"#match-replacement\">How to match the replacement cartridge<\/a><\/li>\r\n        <li><a href=\"#inspect-base\">How to inspect the SPD base<\/a><\/li>\r\n        <li><a href=\"#confirm-replacement\">Checks after replacement<\/a><\/li>\r\n        <li><a href=\"#complete-spd\">When to replace the complete SPD<\/a><\/li>\r\n        <li><a href=\"#ac-dc\">AC versus PV DC replacement<\/a><\/li>\r\n        <li><a href=\"#ordering\">Bulk replacement-module ordering<\/a><\/li>\r\n        <li><a href=\"#faq\">Frequently asked questions<\/a><\/li>\r\n      <\/ol>\r\n    <\/nav>\r\n\r\n    <section id=\"replace-only-module\">\r\n      <div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/#can-you-replace-only-the-pluggable-spd-module\" >Can You Replace Only the Pluggable SPD Module?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/#how-to-replace-a-pluggable-spd-module-step-by-step\" >How to Replace a Pluggable SPD Module Step by Step<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/#how-to-match-the-correct-replacement-spd-cartridge\" >How to Match the Correct Replacement SPD Cartridge<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/#how-to-inspect-the-existing-spd-base\" >How to Inspect the Existing SPD Base<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/#how-to-confirm-the-replacement-was-successful\" >How to Confirm the Replacement Was Successful<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/#when-must-the-complete-spd-be-replaced\" >When Must the Complete SPD Be Replaced?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/#ac-spd-vs-solar-pv-dc-spd-replacement\" >AC SPD vs Solar PV DC SPD Replacement<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/#what-to-confirm-when-ordering-replacement-spd-modules\" >What to Confirm When Ordering Replacement SPD Modules<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/#need-help-matching-a-replacement-spd-module\" >Need Help Matching a Replacement SPD Module?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/#pluggable-spd-replacement-faq\" >Pluggable SPD Replacement FAQ<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/#related-spd-guides\" >Related SPD Guides<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/#planning-replacement-stock-for-multiple-panels\" >Planning Replacement Stock for Multiple Panels?<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"can-you-replace-only-the-pluggable-spd-module\"><\/span>Can You Replace Only the Pluggable SPD Module?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n      <p>\r\n        In many modular surge protective devices, yes. The removable cartridge is designed to be replaced while the wired base remains installed on the DIN rail.\r\n      <\/p>\r\n\r\n      <p>\r\n        Module-only replacement is appropriate only when the original base, terminals, internal contacts, locking mechanism and surrounding conductors remain in serviceable condition.\r\n      <\/p>\r\n\r\n      <div class=\"leeyee-prg-decision\">\r\n        <strong>Module, Base or Complete SPD?<\/strong>\r\n\r\n        <div class=\"leeyee-prg-decision-row\">\r\n          <strong>Replace only the module<\/strong>\r\n          <div>\r\n            The base is clean and undamaged, terminals remain secure, the cartridge slot and contacts are normal, and an approved compatible replacement is available.\r\n          <\/div>\r\n        <\/div>\r\n\r\n        <div class=\"leeyee-prg-decision-row\">\r\n          <strong>Replace the complete SPD<\/strong>\r\n          <div>\r\n            The base is burned, cracked, melted, corroded, deformed, loose or unable to retain the new cartridge correctly.\r\n          <\/div>\r\n        <\/div>\r\n\r\n        <div class=\"leeyee-prg-decision-row\">\r\n          <strong>Stop and investigate<\/strong>\r\n          <div>\r\n            The cartridge fails repeatedly, the upstream protective device trips, abnormal heating is present, or the cause of damage is unclear.\r\n          <\/div>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"leeyee-prg-warning\">\r\n        <strong>Do not confuse \u201cpluggable\u201d with \u201csafe to remove while energized.\u201d<\/strong>\r\n        <p>\r\n          Follow the exact product instructions, approved electrical safety procedure and applicable local requirements. Where manufacturer instructions require a specific release tool or extraction point, use only the documented method.\r\n        <\/p>\r\n      <\/div>\r\n    <\/section>\r\n\r\n    <section id=\"replacement-procedure\">\r\n      <h2><span class=\"ez-toc-section\" id=\"how-to-replace-a-pluggable-spd-module-step-by-step\"><\/span>How to Replace a Pluggable SPD Module Step by Step<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n      <p>\r\n        The precise latch, release point and extraction method vary by product series. The following is a general replacement sequence for modular DIN-rail SPDs and does not replace the manufacturer\u2019s instructions.\r\n      <\/p>\r\n\r\n      <div class=\"leeyee-prg-steps\">\r\n\r\n        <div class=\"leeyee-prg-step\">\r\n          <h3>Identify and Isolate the Relevant Supply<\/h3>\r\n          <p>\r\n            Identify the circuit feeding the SPD. Open the correct isolator, circuit breaker, fuse switch, PV DC isolator or dedicated backup protective device according to the approved site procedure.\r\n          <\/p>\r\n        <\/div>\r\n\r\n        <div class=\"leeyee-prg-step\">\r\n          <h3>Prevent Unintended Re-Energization<\/h3>\r\n          <p>\r\n            Apply lockout and tagout where required. In PV applications, remember that illuminated modules can continue producing DC voltage even when the inverter AC supply is switched off.\r\n          <\/p>\r\n        <\/div>\r\n\r\n        <div class=\"leeyee-prg-step\">\r\n          <h3>Verify Absence of Voltage<\/h3>\r\n          <p>\r\n            Use an appropriate verified test method at the relevant points. Do not rely only on an open switch handle, a dark indicator window or an inactive downstream load.\r\n          <\/p>\r\n        <\/div>\r\n\r\n        <div class=\"leeyee-prg-step\">\r\n          <h3>Record the Original Cartridge<\/h3>\r\n          <p>\r\n            Photograph the complete SPD, front label, cartridge model, electrical ratings, status indicator and pole position before removal. Record whether it is L1, L2, L3, N, positive or negative where applicable.\r\n          <\/p>\r\n        <\/div>\r\n\r\n        <div class=\"leeyee-prg-step\">\r\n          <h3>Release the Retaining Mechanism<\/h3>\r\n          <p>\r\n            Release the latch, retaining tab or manufacturer-specified locking feature. Do not pry the cartridge with a tool unless the documented procedure specifies the tool and the correct release point.\r\n          <\/p>\r\n        <\/div>\r\n\r\n        <div class=\"leeyee-prg-step\">\r\n          <h3>Remove the Old Module<\/h3>\r\n          <p>\r\n            Pull the cartridge along the intended guide direction. Avoid excessive twisting, lateral movement, pulling on conductors or using the indicator window as a handle.\r\n          <\/p>\r\n        <\/div>\r\n\r\n        <div class=\"leeyee-prg-step\">\r\n          <h3>Inspect the Base and Surrounding Installation<\/h3>\r\n          <p>\r\n            Check the cartridge slot, internal contacts, locking mechanism, terminals, DIN-rail mounting and nearby conductor insulation for burns, deformation, corrosion, looseness or contamination.\r\n          <\/p>\r\n        <\/div>\r\n\r\n        <div class=\"leeyee-prg-step\">\r\n          <h3>Compare the Replacement Cartridge<\/h3>\r\n          <p>\r\n            Compare the full product code, application, Uc or Ucpv, SPD Type, discharge-current ratings, Up, protection mode, pole position, dimensions, contacts and mechanical keying.\r\n          <\/p>\r\n        <\/div>\r\n\r\n        <div class=\"leeyee-prg-step\">\r\n          <h3>Insert and Lock the New Module<\/h3>\r\n          <p>\r\n            Align the compatible cartridge with the guide and correct position. Insert it evenly until it is fully seated and the retaining mechanism engages. Stop if unusual force is required.\r\n          <\/p>\r\n        <\/div>\r\n\r\n        <div class=\"leeyee-prg-step\">\r\n          <h3>Restore Power and Verify Operation<\/h3>\r\n          <p>\r\n            Re-energize according to the approved procedure. Confirm that the local indicator shows the expected normal state and verify the wired remote alarm or PLC input where fitted.\r\n          <\/p>\r\n        <\/div>\r\n\r\n      <\/div>\r\n\r\n      <div class=\"leeyee-prg-danger\">\r\n        <strong>Do not force an apparently similar cartridge into the base.<\/strong>\r\n        <p>\r\n          A module can look similar while having different contact geometry, voltage rating, protection mode or approved base combination. Resistance during insertion is a reason to stop and recheck compatibility.\r\n        <\/p>\r\n      <\/div>\r\n    <\/section>\r\n\r\n    <section id=\"match-replacement\">\r\n      <h2><span class=\"ez-toc-section\" id=\"how-to-match-the-correct-replacement-spd-cartridge\"><\/span>How to Match the Correct Replacement SPD Cartridge<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n      <p>\r\n        The safest replacement is the cartridge specified for the original SPD base and product series. Mechanical fit alone does not prove electrical compatibility.\r\n      <\/p>\r\n\r\n      <div class=\"leeyee-prg-table-wrap\">\r\n        <table class=\"leeyee-prg-table\">\r\n          <thead>\r\n            <tr>\r\n              <th>Parameter<\/th>\r\n              <th>What to Confirm<\/th>\r\n              <th>Why It Matters<\/th>\r\n            <\/tr>\r\n          <\/thead>\r\n          <tbody>\r\n            <tr>\r\n              <td>Manufacturer and series<\/td>\r\n              <td>Original base family, cartridge code and approved replacement code<\/td>\r\n              <td>Different series may use different contacts, keying, indication and tested assemblies.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>AC or DC application<\/td>\r\n              <td>AC distribution, PV DC, battery DC or another dedicated circuit<\/td>\r\n              <td>AC and PV DC replacement cartridges are not interchangeable.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Uc or Ucpv<\/td>\r\n              <td>The original continuous operating-voltage rating<\/td>\r\n              <td>A different rating may alter reliability and protection performance.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>SPD Type<\/td>\r\n              <td>Type 1, Type 2 or Type 1+2<\/td>\r\n              <td>The replacement must preserve the intended surge-current function.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>In, Imax and Iimp<\/td>\r\n              <td>All applicable discharge-current ratings<\/td>\r\n              <td>Similar-looking cartridges may have different surge-handling capability.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Up<\/td>\r\n              <td>The voltage protection level<\/td>\r\n              <td>Changing Up may affect coordination with protected equipment.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Protection mode<\/td>\r\n              <td>L-N, L-PE, N-PE, positive-to-earth or negative-to-earth<\/td>\r\n              <td>An N-PE cartridge may differ from a phase or PV cartridge.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Pole position<\/td>\r\n              <td>L1, L2, L3, N, positive or negative<\/td>\r\n              <td>Not every position in a multi-pole SPD necessarily uses an identical module.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Mechanical compatibility<\/td>\r\n              <td>Width, pins, guide rails, latch and keying<\/td>\r\n              <td>The cartridge must seat and lock without modification or excessive force.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Remote indication<\/td>\r\n              <td>Compatibility with the base\u2019s local and remote status mechanism<\/td>\r\n              <td>The cartridge may fit while the alarm mechanism does not operate correctly.<\/td>\r\n            <\/tr>\r\n          <\/tbody>\r\n        <\/table>\r\n      <\/div>\r\n\r\n      <p class=\"leeyee-prg-scroll-hint\">Swipe horizontally to view the complete table.<\/p>\r\n\r\n      <div class=\"leeyee-prg-warning\">\r\n        <strong>A higher Uc or Ucpv is not automatically a better replacement.<\/strong>\r\n        <p>\r\n          Changing the voltage rating may also change Up and the tested performance of the complete SPD. If a different rating appears necessary, review the original SPD selection rather than treating it as a routine cartridge swap.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <h3>Can You Replace Only One Pole?<\/h3>\r\n\r\n      <p>\r\n        Individual cartridge replacement may be possible when the manufacturer permits it and the remaining modules and base are undamaged. Record the exact failed position and inspect the other modules before returning the assembly to service.\r\n      <\/p>\r\n\r\n      <p>\r\n        In 3+1 arrangements, do not confuse the dedicated N-PE module with the phase modules. They may use different internal protection elements and ratings.\r\n      <\/p>\r\n    <\/section>\r\n\r\n    <section id=\"inspect-base\">\r\n      <h2><span class=\"ez-toc-section\" id=\"how-to-inspect-the-existing-spd-base\"><\/span>How to Inspect the Existing SPD Base<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n      <p>\r\n        The base carries the wiring terminals and forms part of the cartridge contact system. It should not be reused automatically simply because it remains attached to the DIN rail.\r\n      <\/p>\r\n\r\n      <div class=\"leeyee-prg-table-wrap\">\r\n        <table class=\"leeyee-prg-table\">\r\n          <thead>\r\n            <tr>\r\n              <th>Inspection Point<\/th>\r\n              <th>Reusable Condition<\/th>\r\n              <th>Replace or Investigate If<\/th>\r\n            <\/tr>\r\n          <\/thead>\r\n          <tbody>\r\n            <tr>\r\n              <td>Cartridge slot<\/td>\r\n              <td>Clean, correctly shaped and free from contamination<\/td>\r\n              <td>The slot is melted, cracked, carbonized or deformed.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Internal contacts<\/td>\r\n              <td>Aligned and free from visible burning or severe oxidation<\/td>\r\n              <td>Contacts show pitting, arcing, discoloration, looseness or corrosion.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Locking mechanism<\/td>\r\n              <td>Engages securely and holds the cartridge firmly<\/td>\r\n              <td>The latch is broken, weak, jammed or unable to retain the module.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Terminal area<\/td>\r\n              <td>No overheating, loose parts or damaged insulation<\/td>\r\n              <td>There are burn marks, softened plastic, loose terminals or conductor discoloration.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>DIN-rail mounting<\/td>\r\n              <td>The base remains straight and securely fixed<\/td>\r\n              <td>The base is loose, tilted, cracked or partly released from the rail.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Environment<\/td>\r\n              <td>Dry, clean and within the intended enclosure condition<\/td>\r\n              <td>Water, condensation, conductive dust, oil, salt or corrosion is present.<\/td>\r\n            <\/tr>\r\n          <\/tbody>\r\n        <\/table>\r\n      <\/div>\r\n\r\n      <p class=\"leeyee-prg-scroll-hint\">Swipe horizontally to view the complete table.<\/p>\r\n\r\n      <div class=\"leeyee-prg-danger\">\r\n        <strong>A new cartridge cannot repair a damaged base.<\/strong>\r\n        <p>\r\n          Installing a replacement into burned, loose, corroded or mechanically damaged contacts can create unreliable connection and further heating. Replace the complete assembly if base integrity cannot be confirmed.\r\n        <\/p>\r\n      <\/div>\r\n    <\/section>\r\n\r\n    <section id=\"confirm-replacement\">\r\n      <h2><span class=\"ez-toc-section\" id=\"how-to-confirm-the-replacement-was-successful\"><\/span>How to Confirm the Replacement Was Successful<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n      <p>\r\n        A normal indicator is necessary, but it is not the only post-replacement check.\r\n      <\/p>\r\n\r\n      <div class=\"leeyee-prg-checklist\">\r\n        <strong>Post-Replacement Checklist<\/strong>\r\n\r\n        <div class=\"leeyee-prg-check-grid\">\r\n          <div class=\"leeyee-prg-check\">The cartridge is in the correct pole position.<\/div>\r\n          <div class=\"leeyee-prg-check\">The module is fully inserted and sits flush.<\/div>\r\n          <div class=\"leeyee-prg-check\">The latch or retaining clip is engaged.<\/div>\r\n          <div class=\"leeyee-prg-check\">The local status indicator shows normal condition.<\/div>\r\n          <div class=\"leeyee-prg-check\">The NC \/ COM \/ NO alarm state is correct.<\/div>\r\n          <div class=\"leeyee-prg-check\">The PLC, BMS or monitoring alarm has reset.<\/div>\r\n          <div class=\"leeyee-prg-check\">There is no unusual smell, sound or visible heating.<\/div>\r\n          <div class=\"leeyee-prg-check\">The upstream protective device remains normal.<\/div>\r\n          <div class=\"leeyee-prg-check\">The panel or combiner box is closed correctly.<\/div>\r\n          <div class=\"leeyee-prg-check\">The maintenance and stock records are updated.<\/div>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"leeyee-prg-note\">\r\n        <strong>What does a green indicator confirm?<\/strong>\r\n        <p>\r\n          A green or normal window generally indicates that the cartridge has not shown internal disconnection. It does not by itself prove that grounding, connection length, backup protection, system voltage or the complete surge-protection design is correct.\r\n        <\/p>\r\n      <\/div>\r\n    <\/section>\r\n\r\n    <section id=\"complete-spd\">\r\n      <h2><span class=\"ez-toc-section\" id=\"when-must-the-complete-spd-be-replaced\"><\/span>When Must the Complete SPD Be Replaced?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n      <p>Replace the base and cartridge together when:<\/p>\r\n\r\n      <ul>\r\n        <li>the base is burned, melted, cracked, carbonized or deformed;<\/li>\r\n        <li>contacts show severe arcing, pitting, corrosion or heat discoloration;<\/li>\r\n        <li>the terminal area or conductor insulation has overheated;<\/li>\r\n        <li>the locking mechanism cannot retain the cartridge securely;<\/li>\r\n        <li>the DIN-rail clip is damaged or unstable;<\/li>\r\n        <li>the replacement cartridge cannot seat fully without force;<\/li>\r\n        <li>water, conductive dust or corrosion has entered the base;<\/li>\r\n        <li>the remote-contact mechanism no longer changes state correctly;<\/li>\r\n        <li>the original series is discontinued and compatibility cannot be confirmed;<\/li>\r\n        <li>the manufacturer requires a matched base-and-cartridge replacement.<\/li>\r\n      <\/ul>\r\n    <\/section>\r\n\r\n    <section id=\"ac-dc\">\r\n      <h2><span class=\"ez-toc-section\" id=\"ac-spd-vs-solar-pv-dc-spd-replacement\"><\/span>AC SPD vs Solar PV DC SPD Replacement<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n      <div class=\"leeyee-prg-table-wrap\">\r\n        <table class=\"leeyee-prg-table\">\r\n          <thead>\r\n            <tr>\r\n              <th>Replacement Point<\/th>\r\n              <th>AC Distribution SPD<\/th>\r\n              <th>Solar PV DC SPD<\/th>\r\n            <\/tr>\r\n          <\/thead>\r\n          <tbody>\r\n            <tr>\r\n              <td>Main voltage parameter<\/td>\r\n              <td>Confirm Uc and the AC system arrangement.<\/td>\r\n              <td>Confirm Ucpv against the maximum PV array voltage.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Isolation<\/td>\r\n              <td>Isolate the relevant AC supply and verify absence of voltage.<\/td>\r\n              <td>Account for voltage produced by illuminated PV modules and isolate the DC source correctly.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Module position<\/td>\r\n              <td>Confirm L, N, PE, L-N, L-PE or N-PE position.<\/td>\r\n              <td>Confirm positive, negative, earth and the specified PV protection arrangement.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Replacement cartridge<\/td>\r\n              <td>Match the original AC series, Uc, Type and protection mode.<\/td>\r\n              <td>Use a PV DC cartridge approved for the original base and Ucpv.<\/td>\r\n            <\/tr>\r\n            <tr>\r\n              <td>Common error<\/td>\r\n              <td>Mixing phase cartridges with dedicated N-PE modules.<\/td>\r\n              <td>Using an AC cartridge, wrong Ucpv or incorrect polarity position.<\/td>\r\n            <\/tr>\r\n          <\/tbody>\r\n        <\/table>\r\n      <\/div>\r\n\r\n      <p class=\"leeyee-prg-scroll-hint\">Swipe horizontally to view the complete table.<\/p>\r\n\r\n      <div class=\"leeyee-prg-warning\">\r\n        <strong>Do not install an AC cartridge in a PV DC base because it appears to fit.<\/strong>\r\n        <p>\r\n          PV replacement cartridges must match the original PV SPD design, Ucpv, protection arrangement, surge ratings, product series and mechanical interface.\r\n        <\/p>\r\n      <\/div>\r\n    <\/section>\r\n\r\n    <section id=\"ordering\">\r\n      <h2><span class=\"ez-toc-section\" id=\"what-to-confirm-when-ordering-replacement-spd-modules\"><\/span>What to Confirm When Ordering Replacement SPD Modules<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n      <p>\r\n        For accurate compatibility checking, send more than a front-view photograph or a request for a \u201c40kA replacement cartridge.\u201d\r\n      <\/p>\r\n\r\n      <div class=\"leeyee-prg-checklist\">\r\n        <strong>Information to Send the Supplier<\/strong>\r\n\r\n        <div class=\"leeyee-prg-check-grid\">\r\n          <div class=\"leeyee-prg-check\">Complete manufacturer and model number<\/div>\r\n          <div class=\"leeyee-prg-check\">Base code and cartridge code<\/div>\r\n          <div class=\"leeyee-prg-check\">Clear front-label photograph<\/div>\r\n          <div class=\"leeyee-prg-check\">Photo of the empty base and cartridge contacts<\/div>\r\n          <div class=\"leeyee-prg-check\">AC or DC application<\/div>\r\n          <div class=\"leeyee-prg-check\">Nominal voltage or maximum PV voltage<\/div>\r\n          <div class=\"leeyee-prg-check\">Uc or Ucpv<\/div>\r\n          <div class=\"leeyee-prg-check\">SPD Type and discharge-current ratings<\/div>\r\n          <div class=\"leeyee-prg-check\">Pole and protection-mode configuration<\/div>\r\n          <div class=\"leeyee-prg-check\">Remote signal requirement<\/div>\r\n          <div class=\"leeyee-prg-check\">Cartridge only or complete SPD set<\/div>\r\n          <div class=\"leeyee-prg-check\">Quantity, packaging and OEM requirements<\/div>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"leeyee-prg-cta\">\r\n        <h2><span class=\"ez-toc-section\" id=\"need-help-matching-a-replacement-spd-module\"><\/span>Need Help Matching a Replacement SPD Module?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n        <p>\r\n          Send the complete SPD label, cartridge and base photographs, system voltage, application and required quantity. LEEYEE can help check whether you need replacement cartridges or complete matched SPD assemblies.\r\n        <\/p>\r\n\r\n        <div class=\"leeyee-prg-actions\">\r\n          <button\r\n            type=\"button\"\r\n            class=\"leeyee-prg-btn leeyee-prg-btn-primary leeyee-site-popup-btn\"\r\n            aria-label=\"Request replacement SPD module recommendation\">\r\n            <span>Request Module Recommendation<\/span>\r\n          <\/button>\r\n\r\n          <a\r\n            class=\"leeyee-prg-btn leeyee-prg-btn-secondary\"\r\n            href=\"https:\/\/www.cnspd.com\/pluggable-surge-protective-device\/\">\r\n            <span>View Pluggable SPD Options<\/span>\r\n          <\/a>\r\n        <\/div>\r\n      <\/div>\r\n    <\/section>\r\n\r\n    <section id=\"faq\">\r\n      <h2><span class=\"ez-toc-section\" id=\"pluggable-spd-replacement-faq\"><\/span>Pluggable SPD Replacement FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n      <div class=\"leeyee-prg-faq\">\r\n\r\n        <details>\r\n          <summary>Can I replace only the pluggable SPD cartridge?<\/summary>\r\n          <div class=\"leeyee-prg-faq-answer\">\r\n            <p>\r\n              In many modular SPDs, yes. The wired base may remain installed if it is clean, undamaged, mechanically secure and compatible with the exact replacement cartridge.\r\n            <\/p>\r\n          <\/div>\r\n        <\/details>\r\n\r\n        <details>\r\n          <summary>Must the circuit be de-energized before replacement?<\/summary>\r\n          <div class=\"leeyee-prg-faq-answer\">\r\n            <p>\r\n              The relevant circuit should normally be isolated and absence of voltage verified unless the exact product documentation and approved site procedure explicitly permit another method. Pluggable does not automatically mean hot-swappable.\r\n            <\/p>\r\n          <\/div>\r\n        <\/details>\r\n\r\n        <details>\r\n          <summary>Can I use a replacement cartridge from another brand?<\/summary>\r\n          <div class=\"leeyee-prg-faq-answer\">\r\n            <p>\r\n              Do not assume cross-brand compatibility. Similar-looking cartridges may have different contacts, keying, voltage ratings, protection modes and tested base combinations.\r\n            <\/p>\r\n          <\/div>\r\n        <\/details>\r\n\r\n        <details>\r\n          <summary>Can I install a higher-Uc module in the same base?<\/summary>\r\n          <div class=\"leeyee-prg-faq-answer\">\r\n            <p>\r\n              Not as an automatic substitute. Changing Uc may also affect Up and the tested performance of the assembly. Review the full SPD selection before changing the voltage rating.\r\n            <\/p>\r\n          <\/div>\r\n        <\/details>\r\n\r\n        <details>\r\n          <summary>Can only one pole be replaced?<\/summary>\r\n          <div class=\"leeyee-prg-faq-answer\">\r\n            <p>\r\n              Often yes, when individual cartridges are manufacturer-replaceable and the remaining modules and base are undamaged. Confirm the exact pole position and protection mode before installation.\r\n            <\/p>\r\n          <\/div>\r\n        <\/details>\r\n\r\n        <details>\r\n          <summary>What should I do if the new cartridge does not fit?<\/summary>\r\n          <div class=\"leeyee-prg-faq-answer\">\r\n            <p>\r\n              Stop and recheck the complete product code, product revision, Uc or Ucpv, protection mode, dimensions, contact arrangement and mechanical keying. Do not modify or force the cartridge.\r\n            <\/p>\r\n          <\/div>\r\n        <\/details>\r\n\r\n        <details>\r\n          <summary>When should the complete SPD base be replaced?<\/summary>\r\n          <div class=\"leeyee-prg-faq-answer\">\r\n            <p>\r\n              Replace the complete SPD when the base has burns, cracks, melting, corrosion, damaged contacts, loose terminals, a broken latch, water ingress or unreliable cartridge seating.\r\n            <\/p>\r\n          <\/div>\r\n        <\/details>\r\n\r\n        <details>\r\n          <summary>Can an AC cartridge be used in a solar PV DC SPD?<\/summary>\r\n          <div class=\"leeyee-prg-faq-answer\">\r\n            <p>\r\n              No. A PV DC replacement must match the original PV design, Ucpv, protection arrangement, surge ratings, product series and base interface.\r\n            <\/p>\r\n          <\/div>\r\n        <\/details>\r\n\r\n        <details>\r\n          <summary>Does a green indicator prove that the entire SPD system is correct?<\/summary>\r\n          <div class=\"leeyee-prg-faq-answer\">\r\n            <p>\r\n              No. It generally indicates that the cartridge has not shown internal disconnection. It does not prove that grounding, backup protection, wiring or voltage selection is correct.\r\n            <\/p>\r\n          <\/div>\r\n        <\/details>\r\n\r\n        <details>\r\n          <summary>What should I do if the new module fails again?<\/summary>\r\n          <div class=\"leeyee-prg-faq-answer\">\r\n            <p>\r\n              Do not continue replacing cartridges without investigation. Check the actual system voltage, original SPD selection, backup protection, terminals, grounding, enclosure condition and event history. See the\r\n              <a href=\"https:\/\/www.cnspd.com\/check-spd-failure\/\">SPD Failure Inspection Guide<\/a>.\r\n            <\/p>\r\n          <\/div>\r\n        <\/details>\r\n\r\n      <\/div>\r\n    <\/section>\r\n\r\n    <section class=\"leeyee-prg-related\">\r\n      <h2><span class=\"ez-toc-section\" id=\"related-spd-guides\"><\/span>Related SPD Guides<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n      <div class=\"leeyee-prg-related-grid\">\r\n\r\n        <a class=\"leeyee-prg-related-link\" href=\"https:\/\/www.cnspd.com\/spd-cartridge-replacement\/\">\r\n          <strong>SPD Cartridge Replacement Guide<\/strong>\r\n          <span>Learn when a cartridge should be replaced and what the failure indicator means.<\/span>\r\n        <\/a>\r\n\r\n        <a class=\"leeyee-prg-related-link\" href=\"https:\/\/www.cnspd.com\/check-spd-failure\/\">\r\n          <strong>How to Check SPD Failure<\/strong>\r\n          <span>Inspect suspected SPD failure in distribution boards and solar combiner boxes.<\/span>\r\n        <\/a>\r\n\r\n        <a class=\"leeyee-prg-related-link\" href=\"https:\/\/www.cnspd.com\/visual-indicator-spd\/\">\r\n          <strong>SPD Indicator Window Guide<\/strong>\r\n          <span>Understand green and red visual status indicators.<\/span>\r\n        <\/a>\r\n\r\n        <a class=\"leeyee-prg-related-link\" href=\"https:\/\/www.cnspd.com\/spd-remote-alarm-plc\/\">\r\n          <strong>SPD Remote Alarm to PLC<\/strong>\r\n          <span>Connect and verify NC, COM and NO monitoring contacts.<\/span>\r\n        <\/a>\r\n\r\n        <a class=\"leeyee-prg-related-link\" href=\"https:\/\/www.cnspd.com\/pluggable-surge-protective-device\/\">\r\n          <strong>Pluggable Surge Protective Devices<\/strong>\r\n          <span>Compare modular AC and DC SPD structures for panel and OEM applications.<\/span>\r\n        <\/a>\r\n\r\n        <a class=\"leeyee-prg-related-link\" href=\"https:\/\/www.cnspd.com\/spd-selection-guide\/\">\r\n          <strong>SPD Selection Guide<\/strong>\r\n          <span>Confirm voltage, SPD Type, discharge-current rating and application.<\/span>\r\n        <\/a>\r\n\r\n      <\/div>\r\n    <\/section>\r\n\r\n    <div class=\"leeyee-prg-cta\">\r\n      <h2><span class=\"ez-toc-section\" id=\"planning-replacement-stock-for-multiple-panels\"><\/span>Planning Replacement Stock for Multiple Panels?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n      <p>\r\n        Send your installed SPD list, label photographs, annual demand and document requirements. We can help organize compatible cartridges, complete SPD sets, OEM labels and batch packaging.\r\n      <\/p>\r\n\r\n      <div class=\"leeyee-prg-actions\">\r\n        <button\r\n          type=\"button\"\r\n          class=\"leeyee-prg-btn leeyee-prg-btn-primary leeyee-site-popup-btn\"\r\n          aria-label=\"Send replacement SPD requirements\">\r\n          <span>Send Replacement Requirements<\/span>\r\n        <\/button>\r\n      <\/div>\r\n    <\/div>\r\n\r\n    <p class=\"leeyee-prg-disclaimer\">\r\n      Safety note: This article explains general replacement principles for pluggable surge protective devices. The product manufacturer\u2019s instructions, electrical design documents, applicable regulations and approved site safety procedure take priority. Work inside electrical equipment should only be performed by appropriately qualified personnel.\r\n    <\/p>\r\n\r\n  <\/div>\r\n<\/article>\r\n\r\n<script>\r\ndocument.addEventListener('DOMContentLoaded', function () {\r\n  var popupButtons = document.querySelectorAll('.leeyee-site-popup-btn');\r\n\r\n  popupButtons.forEach(function (button) {\r\n    button.addEventListener('click', function (event) {\r\n      event.preventDefault();\r\n\r\n      var realPopupTrigger = document.querySelector(\r\n        '.w-popup.ush_popup_1 .w-popup-trigger'\r\n      );\r\n\r\n      if (realPopupTrigger) {\r\n        realPopupTrigger.click();\r\n      } else {\r\n        window.open(\r\n          'https:\/\/www.cnspd.com\/contact\/',\r\n          '_blank',\r\n          'noopener'\r\n        );\r\n      }\r\n    });\r\n  });\r\n});\r\n<\/script>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"Article\",\r\n  \"headline\": \"Pluggable SPD Replacement: How to Replace the Module Safely\",\r\n  \"description\": \"Learn how to replace a pluggable SPD module safely, inspect the existing base, match the correct cartridge, verify the indicator and order compatible replacement modules.\",\r\n  \"author\": {\r\n    \"@type\": \"Organization\",\r\n    \"name\": \"LEEYEE\"\r\n  },\r\n  \"publisher\": {\r\n    \"@type\": \"Organization\",\r\n    \"name\": \"LEEYEE\",\r\n    \"url\": \"https:\/\/www.cnspd.com\/\"\r\n  },\r\n  \"mainEntityOfPage\": {\r\n    \"@type\": \"WebPage\",\r\n    \"@id\": \"https:\/\/www.cnspd.com\/pluggable-spd-replacement\/\"\r\n  }\r\n}\r\n<\/script>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"FAQPage\",\r\n  \"mainEntity\": [\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can I replace only the pluggable SPD cartridge?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"In many modular SPDs, the wired base may remain installed if it is clean, undamaged, mechanically secure and compatible with the exact replacement cartridge.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Must the circuit be de-energized before replacement?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"The relevant circuit should normally be isolated and absence of voltage verified unless the exact product documentation and approved site procedure explicitly permit another method.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can I use a replacement cartridge from another brand?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Do not assume cross-brand compatibility. Similar-looking cartridges may have different contacts, keying, voltage ratings, protection modes and tested base combinations.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can I install a higher-Uc module in the same base?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Not as an automatic substitute. Changing Uc may also affect Up and the tested performance of the complete SPD assembly.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can only one pole be replaced?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Often yes, when individual cartridges are manufacturer-replaceable and the remaining modules and base are undamaged.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What should I do if the replacement cartridge does not fit?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Stop and recheck the complete product code, voltage rating, protection mode, product revision, contact arrangement and mechanical keying. Do not modify or force the cartridge.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"When should the complete SPD base be replaced?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Replace the complete SPD when the base has burns, cracks, melting, corrosion, damaged contacts, loose terminals, a broken latch, water ingress or unreliable cartridge seating.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can an AC cartridge be used in a solar PV DC SPD?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"No. A PV DC replacement must match the original PV design, Ucpv, protection arrangement, surge ratings, product series and base interface.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Does a green indicator prove that the entire SPD system is correct?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"No. A normal indicator does not prove that grounding, backup protection, wiring or voltage selection is correct.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What should I do if the new module fails again?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Do not continue replacing cartridges without investigation. Check the actual system voltage, SPD selection, backup protection, terminals, grounding, enclosure condition and event history.\"\r\n      }\r\n    }\r\n  ]\r\n}\r\n<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Pluggable SPD Replacement Guide In many pluggable SPDs, the removable protection module can be replaced without disconnecting and rewiring the base\u2014but only when the existing base is undamaged and the replacement cartridge is fully compatible. The correct procedure is to isolate the relevant circuit, verify absence of voltage, record the original module, remove it according&#8230;<\/p>","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-29963","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pluggable SPD Replacement Guide | Replace the Module Safely<\/title>\n<meta name=\"description\" content=\"Learn how to replace a pluggable SPD module safely, inspect the existing base, match the correct cartridge, verify the indicator and order compatible replacement modules.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pluggable SPD Replacement Guide | Replace the Module Safely\" \/>\n<meta property=\"og:description\" content=\"Learn how to replace a pluggable SPD module safely, inspect the existing base, match the correct cartridge, verify the indicator and order compatible replacement modules.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cnspd.com\/pt\/pluggable-spd-replacement\/\" \/>\n<meta property=\"og:site_name\" content=\"Surge Protector, Surge Arrestor, Isolating Switch - LEEYEE\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-10T02:46:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-10T02:46:59+00:00\" \/>\n<meta name=\"author\" content=\"Devin Ling\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Devin Ling\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"11 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pluggable-spd-replacement\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pluggable-spd-replacement\\\/\"},\"author\":{\"name\":\"Devin Ling\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#\\\/schema\\\/person\\\/f49dbafe62c5b47100ad2d9f88af92d3\"},\"headline\":\"Pluggable SPD Replacement: How to Replace the Module Safely\",\"datePublished\":\"2026-07-10T02:46:50+00:00\",\"dateModified\":\"2026-07-10T02:46:59+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pluggable-spd-replacement\\\/\"},\"wordCount\":2434,\"articleSection\":[\"News\"],\"inLanguage\":\"pt-PT\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pluggable-spd-replacement\\\/\",\"url\":\"https:\\\/\\\/www.cnspd.com\\\/pluggable-spd-replacement\\\/\",\"name\":\"Pluggable SPD Replacement Guide | Replace the Module Safely\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#website\"},\"datePublished\":\"2026-07-10T02:46:50+00:00\",\"dateModified\":\"2026-07-10T02:46:59+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#\\\/schema\\\/person\\\/f49dbafe62c5b47100ad2d9f88af92d3\"},\"description\":\"Learn how to replace a pluggable SPD module safely, inspect the existing base, match the correct cartridge, verify the indicator and order compatible replacement modules.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pluggable-spd-replacement\\\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.cnspd.com\\\/pluggable-spd-replacement\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pluggable-spd-replacement\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.cnspd.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Pluggable SPD Replacement: How to Replace the Module Safely\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#website\",\"url\":\"https:\\\/\\\/www.cnspd.com\\\/\",\"name\":\"Surge Protector, Surge Arrestor, Isolating Switch - 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