{"id":29843,"date":"2026-07-07T13:54:00","date_gmt":"2026-07-07T05:54:00","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=29843"},"modified":"2026-07-07T14:12:51","modified_gmt":"2026-07-07T06:12:51","slug":"spd-cartridge-replacement-guide-for-maintenance-teams-and-panel-builders","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/fr\/spd-cartridge-replacement-guide\/","title":{"rendered":"SPD Cartridge Replacement Guide for Maintenance Teams and Panel Builders"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"29843\" class=\"elementor elementor-29843\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ab0e43e e-flex e-con-boxed e-con e-parent\" data-id=\"ab0e43e\" 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-de3df7e elementor-widget elementor-widget-html\" data-id=\"de3df7e\" 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  .ly-spdcr-wrap {\r\n    max-width: 860px;\r\n    margin: 0 auto;\r\n    padding: 34px 18px 60px;\r\n    color: #1f2937;\r\n    font-size: 16.5px;\r\n    line-height: 1.72;\r\n  }\r\n\r\n  .ly-spdcr-wrap * {\r\n    box-sizing: border-box;\r\n  }\r\n\r\n  .ly-spdcr-wrap a {\r\n    color: #004898;\r\n    text-decoration: none;\r\n    font-weight: 600;\r\n  }\r\n\r\n  .ly-spdcr-wrap a:hover {\r\n    text-decoration: underline;\r\n  }\r\n\r\n  .ly-spdcr-eyebrow {\r\n    display: inline-flex;\r\n    align-items: center;\r\n    gap: 8px;\r\n    margin: 0 0 12px;\r\n    padding: 6px 12px;\r\n    border-radius: 999px;\r\n    background: #eef5ff;\r\n    color: #004898;\r\n    font-size: 13px;\r\n    font-weight: 700;\r\n    letter-spacing: .02em;\r\n  }\r\n\r\n  .ly-spdcr-hero {\r\n    padding: 26px 28px;\r\n    border: 1px solid 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auto;\r\n    border-radius: 16px;\r\n    border: 1px solid #d9e9f8;\r\n    box-shadow: 0 8px 22px rgba(15, 23, 42, .06);\r\n  }\r\n\r\n  .ly-spdcr-figure figcaption {\r\n    margin-top: 9px;\r\n    color: #64748b;\r\n    font-size: 14px;\r\n    line-height: 1.5;\r\n    text-align: center;\r\n  }\r\n\r\n  .ly-spdcr-section {\r\n    margin: 38px 0 0;\r\n  }\r\n\r\n  .ly-spdcr-section h2 {\r\n    margin: 0 0 14px;\r\n    color: #0f172a;\r\n    font-size: 29px;\r\n    line-height: 1.25;\r\n    letter-spacing: -0.01em;\r\n  }\r\n\r\n  .ly-spdcr-section h3 {\r\n    margin: 24px 0 10px;\r\n    color: #0f172a;\r\n    font-size: 22px;\r\n    line-height: 1.3;\r\n  }\r\n\r\n  .ly-spdcr-section p {\r\n    margin: 0 0 14px;\r\n  }\r\n\r\n  .ly-spdcr-note,\r\n  .ly-spdcr-warning,\r\n  .ly-spdcr-cta,\r\n  .ly-spdcr-product-note {\r\n    margin: 24px 0;\r\n    padding: 20px 22px;\r\n    border-radius: 14px;\r\n  }\r\n\r\n  .ly-spdcr-note {\r\n    border: 1px solid #d9e9f8;\r\n    background: #f7fbff;\r\n  }\r\n\r\n  .ly-spdcr-warning {\r\n    border: 1px solid #ffd9b0;\r\n    background: #fff8f0;\r\n  }\r\n\r\n  .ly-spdcr-product-note {\r\n    border: 1px solid #c7ddf3;\r\n    background: #f4f9ff;\r\n  }\r\n\r\n  .ly-spdcr-product-note h3 {\r\n    margin-top: 0;\r\n  }\r\n\r\n  .ly-spdcr-warning strong,\r\n  .ly-spdcr-note strong,\r\n  .ly-spdcr-product-note strong {\r\n    color: #0f172a;\r\n  }\r\n\r\n  .ly-spdcr-table-wrap {\r\n    width: 100%;\r\n    overflow-x: auto;\r\n    margin: 18px 0 24px;\r\n    border: 1px solid #d9e9f8;\r\n    border-radius: 14px;\r\n    background: #fff;\r\n  }\r\n\r\n  .ly-spdcr-table {\r\n    width: 100%;\r\n    min-width: 720px;\r\n    border-collapse: collapse;\r\n  }\r\n\r\n  .ly-spdcr-table th,\r\n  .ly-spdcr-table td {\r\n    padding: 13px 14px;\r\n    border-bottom: 1px solid #e5edf6;\r\n    text-align: left;\r\n    vertical-align: top;\r\n  }\r\n\r\n  .ly-spdcr-table th {\r\n    background: #f1f7ff;\r\n    color: #004898;\r\n    font-size: 14px;\r\n    font-weight: 800;\r\n  }\r\n\r\n  .ly-spdcr-table tr:last-child td {\r\n    border-bottom: none;\r\n  }\r\n\r\n  .ly-spdcr-list {\r\n    margin: 12px 0 0;\r\n    padding-left: 20px;\r\n  }\r\n\r\n  .ly-spdcr-list li {\r\n    margin: 7px 0;\r\n  }\r\n\r\n  .ly-spdcr-checkgrid {\r\n    display: grid;\r\n    grid-template-columns: 1fr 1fr;\r\n    gap: 12px;\r\n    margin: 18px 0 24px;\r\n  }\r\n\r\n  .ly-spdcr-checkitem {\r\n    padding: 14px 15px;\r\n    border: 1px solid #d9e9f8;\r\n    border-radius: 12px;\r\n    background: #fff;\r\n  }\r\n\r\n  .ly-spdcr-checkitem strong {\r\n    display: block;\r\n    margin-bottom: 4px;\r\n    color: #004898;\r\n  }\r\n\r\n  .ly-spdcr-steps {\r\n    counter-reset: step;\r\n    margin: 18px 0 0;\r\n    padding: 0;\r\n    list-style: none;\r\n  }\r\n\r\n  .ly-spdcr-steps li {\r\n    counter-increment: step;\r\n    position: relative;\r\n    margin: 0 0 14px;\r\n    padding: 16px 18px 16px 58px;\r\n    border: 1px solid #d9e9f8;\r\n    border-radius: 13px;\r\n    background: #fff;\r\n  }\r\n\r\n  .ly-spdcr-steps li:before {\r\n    content: counter(step);\r\n    position: absolute;\r\n    left: 18px;\r\n    top: 17px;\r\n    width: 28px;\r\n    height: 28px;\r\n    border-radius: 50%;\r\n    background: #004898;\r\n    color: #fff;\r\n    font-size: 14px;\r\n    font-weight: 800;\r\n    line-height: 28px;\r\n    text-align: center;\r\n  }\r\n\r\n  .ly-spdcr-steps strong {\r\n    display: block;\r\n    margin-bottom: 4px;\r\n    color: #0f172a;\r\n  }\r\n\r\n  .ly-spdcr-cta {\r\n    border: 1px solid #d9e9f8;\r\n    background: #f7fbff;\r\n    text-align: left;\r\n  }\r\n\r\n  .ly-spdcr-cta h2 {\r\n    margin: 0 0 10px;\r\n    color: #0f172a;\r\n    font-size: 25px;\r\n    line-height: 1.28;\r\n  }\r\n\r\n  .ly-spdcr-btnrow {\r\n    display: flex;\r\n    flex-wrap: wrap;\r\n    gap: 12px;\r\n    margin-top: 16px;\r\n  }\r\n\r\n  .ly-spdcr-btn,\r\n  .ly-spdcr-btn:visited,\r\n  .ly-spdcr-btn:hover,\r\n  .ly-spdcr-btn:focus {\r\n    display: inline-flex !important;\r\n    align-items: center !important;\r\n    justify-content: center !important;\r\n    min-height: 44px !important;\r\n    min-width: 260px !important;\r\n    padding: 11px 22px !important;\r\n    border-radius: 999px !important;\r\n    background: #004898 !important;\r\n    color: #ffffff !important;\r\n    border: 1px solid #004898 !important;\r\n    font-size: 15px !important;\r\n    font-weight: 800 !important;\r\n    line-height: 1.2 !important;\r\n    text-decoration: none !important;\r\n    box-shadow: 0 8px 18px rgba(0, 72, 152, .16);\r\n    visibility: visible !important;\r\n    opacity: 1 !important;\r\n    text-align: center !important;\r\n  }\r\n\r\n  .ly-spdcr-btn:hover,\r\n  .ly-spdcr-btn:focus {\r\n    transform: translateY(-1px);\r\n    box-shadow: 0 10px 22px rgba(0, 72, 152, .2);\r\n  }\r\n\r\n  .ly-spdcr-btn span,\r\n  .ly-spdcr-btn:visited span,\r\n  .ly-spdcr-btn:hover span,\r\n  .ly-spdcr-btn:focus span {\r\n    display: inline-block !important;\r\n    color: #ffffff !important;\r\n    visibility: visible !important;\r\n    opacity: 1 !important;\r\n    line-height: 1.2 !important;\r\n    white-space: nowrap !important;\r\n    text-decoration: none !important;\r\n  }\r\n\r\n  .ly-spdcr-btn-secondary,\r\n  .ly-spdcr-btn-secondary:visited,\r\n  .ly-spdcr-btn-secondary:hover,\r\n  .ly-spdcr-btn-secondary:focus {\r\n    display: inline-flex !important;\r\n    align-items: center !important;\r\n    justify-content: center !important;\r\n    min-height: 44px !important;\r\n    padding: 11px 18px !important;\r\n    border-radius: 999px !important;\r\n    background: #ffffff !important;\r\n    color: #004898 !important;\r\n    border: 1px solid #b9d4ef !important;\r\n    font-size: 15px !important;\r\n    font-weight: 800 !important;\r\n    line-height: 1.2 !important;\r\n    text-decoration: none !important;\r\n    visibility: visible !important;\r\n    opacity: 1 !important;\r\n    text-align: center !important;\r\n  }\r\n\r\n  .ly-spdcr-btn-secondary:hover,\r\n  .ly-spdcr-btn-secondary:focus {\r\n    background: #eef5ff !important;\r\n  }\r\n\r\n  .ly-spdcr-btn-secondary span,\r\n  .ly-spdcr-btn-secondary:visited span,\r\n  .ly-spdcr-btn-secondary:hover span,\r\n  .ly-spdcr-btn-secondary:focus span {\r\n    display: inline-block !important;\r\n    color: #004898 !important;\r\n    visibility: visible !important;\r\n    opacity: 1 !important;\r\n    line-height: 1.2 !important;\r\n    white-space: nowrap !important;\r\n    text-decoration: none !important;\r\n  }\r\n\r\n  .ly-spdcr-related {\r\n    display: grid;\r\n    grid-template-columns: 1fr 1fr;\r\n    gap: 12px;\r\n    margin-top: 18px;\r\n  }\r\n\r\n  .ly-spdcr-related a {\r\n    display: block;\r\n    padding: 15px 16px;\r\n    border: 1px solid #d9e9f8;\r\n    border-radius: 13px;\r\n    background: #fff;\r\n    color: #0f172a;\r\n    font-weight: 700;\r\n  }\r\n\r\n  .ly-spdcr-related a span {\r\n    display: block;\r\n    margin-top: 4px;\r\n    color: #64748b;\r\n    font-size: 14px;\r\n    font-weight: 500;\r\n  }\r\n\r\n  .ly-spdcr-faq {\r\n    margin-top: 18px;\r\n    border-top: 1px solid #d9e9f8;\r\n  }\r\n\r\n  .ly-spdcr-faq details {\r\n    border-bottom: 1px solid #d9e9f8;\r\n    padding: 16px 0;\r\n  }\r\n\r\n  .ly-spdcr-faq summary {\r\n    cursor: pointer;\r\n    color: #0f172a;\r\n    font-size: 17px;\r\n    font-weight: 800;\r\n  }\r\n\r\n  .ly-spdcr-faq p {\r\n    margin: 10px 0 0;\r\n    color: #334155;\r\n  }\r\n\r\n  @media (max-width: 768px) {\r\n    .ly-spdcr-wrap {\r\n      padding: 22px 14px 46px;\r\n      font-size: 16px;\r\n      line-height: 1.68;\r\n    }\r\n\r\n    .ly-spdcr-hero {\r\n      padding: 20px 18px;\r\n      border-radius: 16px;\r\n      margin-bottom: 22px;\r\n    }\r\n\r\n    .ly-spdcr-hero h2 {\r\n      font-size: 27px;\r\n      line-height: 1.22;\r\n    }\r\n\r\n    .ly-spdcr-section {\r\n      margin-top: 32px;\r\n    }\r\n\r\n    .ly-spdcr-section h2,\r\n    .ly-spdcr-quick h2 {\r\n      font-size: 24px;\r\n    }\r\n\r\n    .ly-spdcr-section h3 {\r\n      font-size: 20px;\r\n    }\r\n\r\n    .ly-spdcr-quick,\r\n    .ly-spdcr-note,\r\n    .ly-spdcr-warning,\r\n    .ly-spdcr-cta,\r\n    .ly-spdcr-product-note {\r\n      padding: 18px 16px;\r\n      border-radius: 14px;\r\n    }\r\n\r\n    .ly-spdcr-checkgrid,\r\n    .ly-spdcr-related {\r\n      grid-template-columns: 1fr;\r\n    }\r\n\r\n    .ly-spdcr-steps li {\r\n      padding: 15px 15px 15px 54px;\r\n    }\r\n\r\n    .ly-spdcr-btnrow {\r\n      flex-direction: column;\r\n      gap: 10px;\r\n    }\r\n\r\n    .ly-spdcr-btn,\r\n    .ly-spdcr-btn-secondary {\r\n      width: 100% !important;\r\n      min-width: 0 !important;\r\n      min-height: 46px !important;\r\n    }\r\n\r\n    .ly-spdcr-btn span,\r\n    .ly-spdcr-btn-secondary span {\r\n      white-space: normal !important;\r\n      text-align: center !important;\r\n    }\r\n\r\n    .ly-spdcr-table {\r\n      min-width: 680px;\r\n    }\r\n\r\n    .ly-spdcr-table th,\r\n    .ly-spdcr-table td {\r\n      padding: 12px 12px;\r\n      font-size: 14px;\r\n    }\r\n\r\n    .ly-spdcr-figure {\r\n      margin: 22px 0 26px;\r\n    }\r\n\r\n    .ly-spdcr-figure img {\r\n      border-radius: 12px;\r\n    }\r\n\r\n    .ly-spdcr-figure figcaption {\r\n      font-size: 13px;\r\n    }\r\n  }\r\n<\/style>\r\n\r\n<div class=\"ly-spdcr-wrap\">\r\n\r\n  <section class=\"ly-spdcr-hero\">\r\n    <div class=\"ly-spdcr-eyebrow\">Maintenance & Replacement Guide<\/div>\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\/fr\/spd-cartridge-replacement-guide\/#can-you-replace-only-the-spd-cartridge\" >Can you replace only the SPD cartridge?<\/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\/fr\/spd-cartridge-replacement-guide\/#quick-answer\" >Quick answer<\/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\/fr\/spd-cartridge-replacement-guide\/#what-is-an-spd-cartridge\" >What is an 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\/fr\/spd-cartridge-replacement-guide\/#when-should-an-spd-cartridge-be-replaced\" >When should an SPD cartridge be replaced?<\/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\/fr\/spd-cartridge-replacement-guide\/#can-you-replace-only-the-cartridge-and-keep-the-base\" >Can you replace only the cartridge and keep the base?<\/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\/fr\/spd-cartridge-replacement-guide\/#leeyee-plug-in-spd-replacement-module-reference\" >LEEYEE plug-in SPD replacement module reference<\/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\/fr\/spd-cartridge-replacement-guide\/#when-should-the-spd-base-also-be-replaced\" >When should the SPD base also be replaced?<\/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\/fr\/spd-cartridge-replacement-guide\/#replacement-workflow-for-maintenance-teams\" >Replacement workflow for maintenance teams<\/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\/fr\/spd-cartridge-replacement-guide\/#what-to-confirm-before-ordering-replacement-spd-cartridges\" >What to confirm before ordering replacement SPD cartridges<\/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\/fr\/spd-cartridge-replacement-guide\/#need-a-replacement-cartridge-checklist\" >Need a replacement cartridge checklist?<\/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\/fr\/spd-cartridge-replacement-guide\/#replacement-planning-for-panel-builders-and-distributors\" >Replacement planning for panel builders and distributors<\/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\/fr\/spd-cartridge-replacement-guide\/#common-mistakes-to-avoid\" >Common mistakes to avoid<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/spd-cartridge-replacement-guide\/#related-leeyee-pages\" >Related LEEYEE pages<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/spd-cartridge-replacement-guide\/#faq\" >FAQ<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"can-you-replace-only-the-spd-cartridge\"><\/span>Can you replace only the SPD cartridge?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      When an SPD indicator window turns red, or a remote signal contact sends an alarm, maintenance teams need a clear answer:\r\n      should the plug-in cartridge be replaced, or does the whole SPD base need to be changed?\r\n    <\/p>\r\n    <p>\r\n      This guide explains when to replace an SPD cartridge, when the base must also be checked, and what information panel builders,\r\n      distributors, and OEM buyers should confirm before ordering replacement modules.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section class=\"ly-spdcr-quick\">\r\n    <h2><span class=\"ez-toc-section\" id=\"quick-answer\"><\/span>Quick answer<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      For many plug-in DIN rail SPDs, the failed cartridge can be replaced without rewiring the base.\r\n      But the replacement module must match the original SPD series, voltage rating, pole configuration, protection type, and base structure.\r\n    <\/p>\r\n    <p>\r\n      If the SPD base has burn marks, loose terminals, damaged clips, poor contact, or signs of overheating, do not replace only the cartridge.\r\n      Inspect the complete SPD assembly and replace the base or full unit if needed.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <figure class=\"ly-spdcr-figure\">\r\n    <img decoding=\"async\" src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/when-to-replace-an-spd-cartridge.webp\" alt=\"Flowchart showing when to replace an SPD cartridge after red indicator or remote signal alarm\" loading=\"lazy\">\r\n    <figcaption>Quick decision flow for maintenance teams: replace the cartridge only when the base is compatible and undamaged.<\/figcaption>\r\n  <\/figure>\r\n\r\n  <div class=\"ly-spdcr-table-wrap\">\r\n    <table class=\"ly-spdcr-table\">\r\n      <thead>\r\n        <tr>\r\n          <th>Condition<\/th>\r\n          <th>What it usually means<\/th>\r\n          <th>Recommended action<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td>Indicator window turns red<\/td>\r\n          <td>The protection module has reached end-of-life or has disconnected internally.<\/td>\r\n          <td>Replace the failed cartridge with the same compatible module.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Remote signal alarm<\/td>\r\n          <td>The SPD status contact has changed state and a module may have failed.<\/td>\r\n          <td>Locate the alarmed SPD, check the visual window, then replace the failed module if confirmed.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>After a lightning event<\/td>\r\n          <td>The SPD may have absorbed surge energy and degraded, even if the panel still works.<\/td>\r\n          <td>Inspect the indicator, wiring, base, and maintenance log. Replace if the indicator shows failure.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Burn marks or melted housing<\/td>\r\n          <td>There may be severe surge stress, overheating, loose connection, or wrong selection.<\/td>\r\n          <td>Check both cartridge and base. Do not only replace the module without inspection.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Repeated early failures<\/td>\r\n          <td>The SPD may be incorrectly selected or exposed to unstable voltage, high TOV, or poor grounding.<\/td>\r\n          <td>Check Uc \/ Ucpv, system voltage, grounding, installation quality, and upstream protection.<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <section class=\"ly-spdcr-section\">\r\n    <h2><span class=\"ez-toc-section\" id=\"what-is-an-spd-cartridge\"><\/span>What is an SPD cartridge?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      In a plug-in surge protective device, the cartridge is the removable protection module.\r\n      It normally contains the surge protection components, such as MOV or GDT elements, together with a thermal disconnector and status indicator.\r\n    <\/p>\r\n    <p>\r\n      The base is the fixed part mounted on the DIN rail. It holds the wiring terminals and receives the plug-in cartridge.\r\n      For maintenance teams, this design reduces downtime because the failed protection module can often be changed without removing the whole wired base.\r\n    <\/p>\r\n\r\n    <div class=\"ly-spdcr-note\">\r\n      <strong>Simple way to understand it:<\/strong>\r\n      the cartridge is the replaceable protection core. The base is the wired holder.\r\n      If the cartridge fails but the base is still healthy and compatible, replacing only the cartridge is usually the fastest maintenance option.\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ly-spdcr-section\">\r\n    <h2><span class=\"ez-toc-section\" id=\"when-should-an-spd-cartridge-be-replaced\"><\/span>When should an SPD cartridge be replaced?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      An SPD cartridge should be replaced when its end-of-life indication shows failure, when a remote signal alarm is confirmed on the device,\r\n      or when inspection after surge activity shows that the module is no longer reliable.\r\n    <\/p>\r\n\r\n    <h3>1. The indicator window turns red<\/h3>\r\n    <p>\r\n      Most modular SPDs use a green \/ red visual indicator. Green normally means the protection module is available.\r\n      Red normally means the module has reached end-of-life and should be replaced.\r\n    <\/p>\r\n    <p>\r\n      A red window is not a resettable alarm. It usually means the internal protection element has been disconnected for safety.\r\n      The load may still have power, but surge protection may no longer be available.\r\n    <\/p>\r\n\r\n    <h3>2. The remote signal contact sends an alarm<\/h3>\r\n    <p>\r\n      Many SPDs used in industrial panels, PV combiner boxes, telecom systems, and large distribution boards include a remote signal contact.\r\n      This contact is often wired to a PLC, BMS, SCADA, alarm relay, or monitoring terminal.\r\n    <\/p>\r\n    <p>\r\n      When the remote signal changes state, the maintenance team should not only silence the alarm.\r\n      They should locate the exact SPD, check the visual indicator, inspect the cartridge and base, and replace the failed module when required.\r\n    <\/p>\r\n\r\n    <h3>3. After a strong lightning event or surge event<\/h3>\r\n    <p>\r\n      After a known lightning strike, switching surge, transformer event, or repeated grid disturbance, the SPD should be inspected.\r\n      The cartridge may still look normal, but the site should record the event and check the indicator window, remote alarm status, and panel condition.\r\n    <\/p>\r\n\r\n    <h3>4. When modules fail earlier than expected<\/h3>\r\n    <p>\r\n      If a replacement cartridge fails again within a short period, do not treat it as a simple spare-part issue.\r\n      Check whether the Uc \/ Ucpv rating matches the real system voltage, whether the grounding path is reliable, and whether the SPD type is suitable for the installation position.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section class=\"ly-spdcr-section\">\r\n    <h2><span class=\"ez-toc-section\" id=\"can-you-replace-only-the-cartridge-and-keep-the-base\"><\/span>Can you replace only the cartridge and keep the base?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      Yes, in many plug-in SPD designs, only the cartridge can be replaced if the base is still in good condition.\r\n      This is one reason modular SPDs are popular in distribution boards, industrial cabinets, and OEM panel production.\r\n    <\/p>\r\n\r\n    <div class=\"ly-spdcr-warning\">\r\n      <strong>Do not order an SPD cartridge only by shape or color.<\/strong>\r\n      The replacement module must match the original series, Uc or Ucpv rating, SPD type, pole configuration, remote signal version, and base compatibility.\r\n      A cartridge that looks similar may still be electrically or mechanically incompatible.\r\n    <\/div>\r\n\r\n    <div class=\"ly-spdcr-table-wrap\">\r\n      <table class=\"ly-spdcr-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Can you replace only the cartridge?<\/th>\r\n            <th>When it is acceptable<\/th>\r\n            <th>When it is not acceptable<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>Usually yes<\/td>\r\n            <td>Same brand or confirmed compatible series, same voltage rating, same protection type, same pole configuration, healthy base.<\/td>\r\n            <td>Unknown series, damaged base, loose terminals, wrong voltage, AC\/DC mismatch, or different internal protection mode.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Be careful with older installations<\/td>\r\n            <td>Replacement part numbers are still available and the manufacturer confirms compatibility.<\/td>\r\n            <td>Legacy bases may not accept new cartridge designs, even if the appearance is similar.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Do not mix randomly<\/td>\r\n            <td>Only use cross-reference replacements when tested and confirmed by the supplier.<\/td>\r\n            <td>Do not mix different brands or series just because the cartridge appears to fit.<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ly-spdcr-section\">\r\n    <h2><span class=\"ez-toc-section\" id=\"leeyee-plug-in-spd-replacement-module-reference\"><\/span>LEEYEE plug-in SPD replacement module reference<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      The table below is a reference for maintenance teams, distributors, and panel builders when requesting LEEYEE replacement SPD modules.\r\n      Exact spare module selection should be confirmed by the original product label, system voltage, pole configuration, and project requirement.\r\n    <\/p>\r\n\r\n    <div class=\"ly-spdcr-table-wrap\">\r\n      <table class=\"ly-spdcr-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>LEEYEE SPD series<\/th>\r\n            <th>Typical application<\/th>\r\n            <th>Key details to confirm<\/th>\r\n            <th>Replacement note<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>\r\n              <a href=\"https:\/\/www.cnspd.com\/ly1-c40-surge-protection-device-product\/\" target=\"_blank\" rel=\"noopener\">LY1-C40 Type 2 AC SPD<\/a>\r\n            <\/td>\r\n            <td>AC distribution boards, sub-distribution panels, commercial and industrial cabinets.<\/td>\r\n            <td>Uc rating, pole number, In \/ Imax, remote signal requirement, original label photo.<\/td>\r\n            <td>Use the same compatible plug-in module series. Do not change voltage rating without confirmation.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>\r\n              <a href=\"https:\/\/www.cnspd.com\/ly1-c40m4spluggable-multi-pole-spd-product\/\" target=\"_blank\" rel=\"noopener\">LY1-C40M multi-pole plug-in SPD<\/a>\r\n            <\/td>\r\n            <td>Multi-pole AC panel designs, OEM electrical cabinets, repeated panel production.<\/td>\r\n            <td>1P \/ 2P \/ 3P \/ 4P \/ 3P+N arrangement, base compatibility, remote signal option.<\/td>\r\n            <td>For OEM panels, keep the complete SPD series and spare cartridge part logic consistent across the BOM.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>\r\n              <a href=\"https:\/\/www.cnspd.com\/ly1-c40pv3s-600v-pluggable-multi-pole-spd-product\/\" target=\"_blank\" rel=\"noopener\">LY1-C40PV 600V DC SPD<\/a>\r\n            <\/td>\r\n            <td>PV combiner boxes, DC side protection, solar equipment panels.<\/td>\r\n            <td>Ucpv rating, DC polarity, pole configuration, PV system voltage, certification requirement.<\/td>\r\n            <td>Do not replace DC PV cartridges with AC SPD modules. Confirm Ucpv before ordering.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>\r\n              <a href=\"https:\/\/www.cnspd.com\/ly1-c40pv2s1000v-pluggable-dc-spd-product\/\" target=\"_blank\" rel=\"noopener\">LY1-C40PV 1000V DC SPD<\/a>\r\n            <\/td>\r\n            <td>1000V DC PV systems, inverter cabinets, combiner box suppliers.<\/td>\r\n            <td>1000V DC rating, 2P \/ multi-pole layout, original product label, spare quantity.<\/td>\r\n            <td>Use matching PV SPD cartridges for the same base series and voltage class.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>\r\n              <a href=\"https:\/\/www.cnspd.com\/ly1-c40pv3s-1500vd4-pluggable-multi-pole-spd-product\/\" target=\"_blank\" rel=\"noopener\">LY1-C40PV 1500V DC SPD<\/a>\r\n            <\/td>\r\n            <td>1500V PV combiner boxes, utility-scale solar PV DC protection panels.<\/td>\r\n            <td>1500V DC rating, protection mode, pole configuration, certification and project document requirement.<\/td>\r\n            <td>For 1500V PV projects, confirm voltage class and base compatibility before stocking replacement modules.<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <div class=\"ly-spdcr-product-note\">\r\n      <h3>For replacement support, send the original label first<\/h3>\r\n      <p>\r\n        The fastest way to match a replacement SPD cartridge is to send a clear photo of the original SPD label.\r\n        Please include the panel voltage, AC or DC application, pole configuration, remote signal requirement, and required quantity.\r\n      <\/p>\r\n      <div class=\"ly-spdcr-btnrow\">\r\n        <a class=\"ly-spdcr-btn leeyee-site-popup-btn\" href=\"javascript:void(0);\"><span>Check LEEYEE Replacement Module<\/span><\/a>\r\n        <a class=\"ly-spdcr-btn-secondary\" href=\"https:\/\/www.cnspd.com\/contact\/\" target=\"_blank\" rel=\"noopener\"><span>Send Label Photo<\/span><\/a>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ly-spdcr-section\">\r\n    <h2><span class=\"ez-toc-section\" id=\"when-should-the-spd-base-also-be-replaced\"><\/span>When should the SPD base also be replaced?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      The base should be checked every time a cartridge is replaced.\r\n      In many cases it can stay in service, but there are situations where replacing only the cartridge is not enough.\r\n    <\/p>\r\n\r\n    <div class=\"ly-spdcr-checkgrid\">\r\n      <div class=\"ly-spdcr-checkitem\">\r\n        <strong>Burn marks<\/strong>\r\n        Soot, dark plastic, or melted areas suggest severe stress or overheating.\r\n      <\/div>\r\n      <div class=\"ly-spdcr-checkitem\">\r\n        <strong>Loose terminals<\/strong>\r\n        A loose or damaged terminal can cause heat and unreliable protection.\r\n      <\/div>\r\n      <div class=\"ly-spdcr-checkitem\">\r\n        <strong>Damaged locking clip<\/strong>\r\n        If the cartridge cannot lock firmly, contact may be unstable.\r\n      <\/div>\r\n      <div class=\"ly-spdcr-checkitem\">\r\n        <strong>Remote contact fault<\/strong>\r\n        If the alarm terminal does not reset after cartridge replacement, inspect the base and signal wiring.\r\n      <\/div>\r\n      <div class=\"ly-spdcr-checkitem\">\r\n        <strong>Mechanical deformation<\/strong>\r\n        Cracked housing, warped plastic, or poor fit means the base should not be reused blindly.\r\n      <\/div>\r\n      <div class=\"ly-spdcr-checkitem\">\r\n        <strong>Series incompatibility<\/strong>\r\n        If the old base cannot accept the new cartridge series, replace the matching complete SPD assembly.\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ly-spdcr-section\">\r\n    <h2><span class=\"ez-toc-section\" id=\"replacement-workflow-for-maintenance-teams\"><\/span>Replacement workflow for maintenance teams<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      SPD replacement should be handled by qualified electrical personnel according to local electrical safety rules.\r\n      The following workflow is written for maintenance planning and spare-part control, not for untrained live work.\r\n    <\/p>\r\n\r\n    <ol class=\"ly-spdcr-steps\">\r\n      <li>\r\n        <strong>De-energize and verify safety<\/strong>\r\n        Follow site lockout \/ tagout procedures. Verify that the working area is safe before touching the SPD or panel wiring.\r\n      <\/li>\r\n      <li>\r\n        <strong>Record the original SPD information<\/strong>\r\n        Take a photo of the label. Record model number, Uc or Ucpv, Type 1 \/ Type 2 \/ Type 1+2, In, Imax, Iimp, pole configuration, and remote signal option.\r\n      <\/li>\r\n      <li>\r\n        <strong>Inspect the cartridge and the base<\/strong>\r\n        Check the indicator window, housing, terminal condition, locking clip, wire color change, and signs of overheating.\r\n      <\/li>\r\n      <li>\r\n        <strong>Replace with the same compatible cartridge<\/strong>\r\n        Use a confirmed replacement module from the same series or a supplier-approved equivalent.\r\n        Do not change voltage rating or protection type without engineering confirmation.\r\n      <\/li>\r\n      <li>\r\n        <strong>Re-energize and confirm status<\/strong>\r\n        After replacement, confirm that the indicator returns to normal and that the remote alarm clears if remote signaling is used.\r\n      <\/li>\r\n      <li>\r\n        <strong>Update the maintenance log<\/strong>\r\n        Record replacement date, panel location, reason for replacement, cartridge model, and any abnormal findings.\r\n        This helps future spare-part planning and root-cause analysis.\r\n      <\/li>\r\n    <\/ol>\r\n  <\/section>\r\n\r\n  <section class=\"ly-spdcr-section\">\r\n    <h2><span class=\"ez-toc-section\" id=\"what-to-confirm-before-ordering-replacement-spd-cartridges\"><\/span>What to confirm before ordering replacement SPD cartridges<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      For panel builders, distributors, and project maintenance teams, the biggest mistake is ordering cartridges only by appearance.\r\n      A correct replacement order should be based on the original SPD label and the actual system requirement.\r\n    <\/p>\r\n\r\n    <figure class=\"ly-spdcr-figure\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/before-ordering-spd-replacement-modules.webp\" alt=\"Checklist before ordering SPD replacement cartridges for electrical panels\" loading=\"lazy\">\r\n      <figcaption>Before ordering replacement SPD modules, confirm the original model, voltage rating, pole configuration, and project stock requirement.<\/figcaption>\r\n    <\/figure>\r\n\r\n    <div class=\"ly-spdcr-table-wrap\">\r\n      <table class=\"ly-spdcr-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Information to confirm<\/th>\r\n            <th>Why it matters<\/th>\r\n            <th>Example<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>Original model or series<\/td>\r\n            <td>Confirms whether the new cartridge fits the existing base.<\/td>\r\n            <td>LY1-C40 series, LY1-C40PV series, or other project model<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>AC or DC application<\/td>\r\n            <td>AC and DC SPDs are not interchangeable.<\/td>\r\n            <td>230\/400V AC distribution board or 1000V DC PV combiner box<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Uc \/ Ucpv rating<\/td>\r\n            <td>Wrong continuous operating voltage can cause early failure or unsuitable protection.<\/td>\r\n            <td>275V, 320V, 385V, 440V AC; 600V, 1000V, 1500V DC<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>SPD type<\/td>\r\n            <td>Type 1, Type 2, and Type 1+2 have different discharge duties.<\/td>\r\n            <td>Type 2 for distribution board; Type 1+2 near service entrance<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Discharge current rating<\/td>\r\n            <td>The replacement module should match the original protection level and project specification.<\/td>\r\n            <td>In 20kA, Imax 40kA, Iimp 12.5kA<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Pole configuration<\/td>\r\n            <td>The cartridge arrangement depends on 1P, 2P, 3P, 4P, or 3P+N design.<\/td>\r\n            <td>1P cartridge, N-PE module, 3P+N replacement set<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Remote signal requirement<\/td>\r\n            <td>Some projects need remote status monitoring through NO\/NC\/COM contacts.<\/td>\r\n            <td>Remote signal version for BMS \/ PLC \/ SCADA alarm<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Certification requirement<\/td>\r\n            <td>Project documents may require CE, TUV, CB, or IEC-related documentation.<\/td>\r\n            <td>CE \/ TUV \/ CB file for project approval or OEM documentation<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Maintenance stock quantity<\/td>\r\n            <td>Spare cartridges reduce downtime for repeated panel designs or large installed bases.<\/td>\r\n            <td>10 pcs, 50 pcs, 100 pcs for maintenance stock<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <div class=\"ly-spdcr-cta\">\r\n      <h2><span class=\"ez-toc-section\" id=\"need-a-replacement-cartridge-checklist\"><\/span>Need a replacement cartridge checklist?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n      <p>\r\n        You can request a checklist PDF for internal maintenance, distributor stock planning, or OEM panel spare-part control.\r\n        Send us your SPD label photo and panel requirement, and we can help check the correct replacement module.\r\n      <\/p>\r\n      <div class=\"ly-spdcr-btnrow\">\r\n        <a class=\"ly-spdcr-btn leeyee-site-popup-btn\" href=\"javascript:void(0);\"><span>Request Checklist PDF<\/span><\/a>\r\n        <a class=\"ly-spdcr-btn-secondary\" href=\"https:\/\/www.cnspd.com\/contact\/\" target=\"_blank\" rel=\"noopener\"><span>Send Panel Requirement<\/span><\/a>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ly-spdcr-section\">\r\n    <h2><span class=\"ez-toc-section\" id=\"replacement-planning-for-panel-builders-and-distributors\"><\/span>Replacement planning for panel builders and distributors<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      For one-off maintenance, replacing a failed cartridge may be enough.\r\n      For panel builders, industrial maintenance companies, and SPD distributors, the better approach is to build a small spare-part system.\r\n    <\/p>\r\n\r\n    <div class=\"ly-spdcr-table-wrap\">\r\n      <table class=\"ly-spdcr-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Buyer type<\/th>\r\n            <th>Recommended spare strategy<\/th>\r\n            <th>Business value<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>Maintenance team<\/td>\r\n            <td>Keep spare cartridges for the most common installed SPD models and voltages.<\/td>\r\n            <td>Faster recovery after red indicator or remote alarm.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Panel builder<\/td>\r\n            <td>Use consistent SPD series across repeated cabinet designs.<\/td>\r\n            <td>Easier after-sales service and fewer compatibility mistakes.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Industrial facility<\/td>\r\n            <td>Stock cartridges for critical panels, production lines, telecom rooms, and automation cabinets.<\/td>\r\n            <td>Reduced downtime risk after lightning or grid disturbance.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Distributor<\/td>\r\n            <td>Stock common AC and DC replacement modules by voltage and series.<\/td>\r\n            <td>Higher repeat orders from local electricians, contractors, and maintenance companies.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>OEM buyer<\/td>\r\n            <td>Define both complete SPD and replacement cartridge part numbers in the BOM.<\/td>\r\n            <td>Cleaner long-term procurement and easier private-label support.<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ly-spdcr-section\">\r\n    <h2><span class=\"ez-toc-section\" id=\"common-mistakes-to-avoid\"><\/span>Common mistakes to avoid<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <ul class=\"ly-spdcr-list\">\r\n      <li>Continuing to use an SPD after the indicator window has turned red.<\/li>\r\n      <li>Replacing the cartridge only by appearance without checking Uc \/ Ucpv.<\/li>\r\n      <li>Using an AC cartridge in a DC PV SPD, or a DC cartridge in an AC distribution board.<\/li>\r\n      <li>Mixing different brands or series without confirmed base compatibility.<\/li>\r\n      <li>Replacing the module without checking burn marks, terminal tightness, and base condition.<\/li>\r\n      <li>Changing from 275V to 385V or 440V only because the voltage looks \u201csafer.\u201d<\/li>\r\n      <li>Ignoring remote signal alarms after the monitoring system reports an SPD fault.<\/li>\r\n      <li>Not recording the original model, causing confusion in future maintenance orders.<\/li>\r\n    <\/ul>\r\n\r\n    <div class=\"ly-spdcr-warning\">\r\n      <strong>Do not treat cartridge replacement as only a spare-part job.<\/strong>\r\n      If the same SPD position fails repeatedly, check system voltage, grounding, installation method, upstream protection,\r\n      and whether the selected SPD type is suitable for the panel location.\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ly-spdcr-section\">\r\n    <h2><span class=\"ez-toc-section\" id=\"related-leeyee-pages\"><\/span>Related LEEYEE pages<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      These pages can help if you also need to check voltage rating, discharge current, remote signal function, or compatible SPD products.\r\n    <\/p>\r\n\r\n    <div class=\"ly-spdcr-related\">\r\n      <a href=\"https:\/\/www.cnspd.com\/spd-uc-selection\/\" target=\"_blank\" rel=\"noopener\">\r\n        SPD Uc Selection Guide\r\n        <span>Choose 275V, 320V, 385V, or 440V for AC distribution boards.<\/span>\r\n      <\/a>\r\n      <a href=\"https:\/\/www.cnspd.com\/spd-in-rating-selection\/\" target=\"_blank\" rel=\"noopener\">\r\n        SPD In Rating Selection\r\n        <span>Understand nominal discharge current for different panel applications.<\/span>\r\n      <\/a>\r\n      <a href=\"https:\/\/www.cnspd.com\/spd-imax-selection\/\" target=\"_blank\" rel=\"noopener\">\r\n        SPD Imax Selection Guide\r\n        <span>Compare Imax ratings before choosing a surge protection model.<\/span>\r\n      <\/a>\r\n      <a href=\"https:\/\/www.cnspd.com\/surge-protective-device-with-remote-signal\/\" target=\"_blank\" rel=\"noopener\">\r\n        SPD with Remote Signal Contact\r\n        <span>Learn how NO \/ NC \/ COM alarm contacts support panel monitoring.<\/span>\r\n      <\/a>\r\n      <a href=\"https:\/\/www.cnspd.com\/ly1-c40-surge-protection-device-product\/\" target=\"_blank\" rel=\"noopener\">\r\n        LY1-C40 Type 2 SPD\r\n        <span>DIN rail AC surge protective device for distribution board applications.<\/span>\r\n      <\/a>\r\n      <a href=\"https:\/\/www.cnspd.com\/ly1-c40m4spluggable-multi-pole-spd-product\/\" target=\"_blank\" rel=\"noopener\">\r\n        LY1-C40M 4P Pluggable SPD\r\n        <span>Multi-pole plug-in SPD option for panel builders and OEM projects.<\/span>\r\n      <\/a>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ly-spdcr-section\">\r\n    <h2><span class=\"ez-toc-section\" id=\"faq\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <div class=\"ly-spdcr-faq\">\r\n      <details>\r\n        <summary>Does a red SPD indicator mean the cartridge must be replaced?<\/summary>\r\n        <p>\r\n          In most modular SPDs, yes. A red indicator usually means the protection module has reached end-of-life\r\n          or has disconnected internally. The failed cartridge should be replaced with a compatible module.\r\n        <\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Can I replace only the SPD cartridge?<\/summary>\r\n        <p>\r\n          Yes, if the SPD is a plug-in modular design and the base is still healthy.\r\n          The replacement cartridge must match the original series, voltage rating, protection type, pole configuration, and base structure.\r\n        <\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>How do I identify the correct replacement SPD module?<\/summary>\r\n        <p>\r\n          Start with the original SPD label. Confirm the brand or series, model number, Uc or Ucpv rating, SPD type,\r\n          pole configuration, discharge current rating, remote signal option, and base compatibility before ordering.\r\n        <\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Can different SPD brands use the same replacement cartridge?<\/summary>\r\n        <p>\r\n          Do not assume they can. Even if the cartridge looks similar, the base keying, contact design, thermal disconnection structure,\r\n          and remote signal mechanism may be different. Use only confirmed compatible replacements.\r\n        <\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>When should the SPD base also be replaced?<\/summary>\r\n        <p>\r\n          Replace or further inspect the base if there are burn marks, terminal damage, loose contacts, melted plastic,\r\n          broken clips, remote contact problems, or confirmed incompatibility with the new cartridge series.\r\n        <\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>What should I do when the remote signal alarm is triggered?<\/summary>\r\n        <p>\r\n          Locate the SPD connected to the alarm circuit, check the local indicator window, inspect the cartridge and base,\r\n          and replace the failed module if confirmed. After replacement, verify that the alarm signal resets correctly.\r\n        <\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Can a 385V cartridge replace a 275V cartridge?<\/summary>\r\n        <p>\r\n          Not blindly. The Uc rating must match the actual system voltage and protection requirement.\r\n          A higher Uc may tolerate more voltage fluctuation, but it can also change the protection level.\r\n          Confirm the system condition before changing voltage ratings.\r\n        <\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Can LEEYEE support spare SPD modules for OEM panels?<\/summary>\r\n        <p>\r\n          Yes. For OEM or repeated panel designs, LEEYEE can help check suitable spare SPD modules based on the original SPD series,\r\n          voltage rating, pole configuration, remote signal requirement, and project quantity.\r\n        <\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Should SPDs be checked after lightning?<\/summary>\r\n        <p>\r\n          Yes. After a lightning event or major surge, inspect the SPD indicator, remote alarm status, wiring,\r\n          grounding condition, and panel condition. Replace the cartridge if the device shows failure or damage.\r\n        <\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Do DC PV SPDs also have replaceable cartridges?<\/summary>\r\n        <p>\r\n          Many DC PV SPDs use plug-in modules, but replacement must match the DC voltage rating, Ucpv, polarity,\r\n          protection structure, and base series. AC and DC cartridges should not be mixed.\r\n        <\/p>\r\n      <\/details>\r\n    <\/div>\r\n  <\/section>\r\n\r\n<\/div>\r\n\r\n<script>\r\n  document.addEventListener('DOMContentLoaded', function () {\r\n    var popupButtons = document.querySelectorAll('.leeyee-site-popup-btn');\r\n\r\n    popupButtons.forEach(function (btn) {\r\n      btn.addEventListener('click', function (e) {\r\n        e.preventDefault();\r\n\r\n        var popupTrigger = document.querySelector('.w-popup.ush_popup_1 .w-popup-trigger');\r\n\r\n        if (popupTrigger) {\r\n          popupTrigger.click();\r\n        } else {\r\n          window.open('https:\/\/www.cnspd.com\/contact\/', '_blank');\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\": \"FAQPage\",\r\n  \"mainEntity\": [\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Does a red SPD indicator mean the cartridge must be replaced?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"In most modular SPDs, yes. A red indicator usually means the protection module has reached end-of-life or has disconnected internally. The failed cartridge should be replaced with a compatible module.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can I replace only the SPD cartridge?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Yes, if the SPD is a plug-in modular design and the base is still healthy. The replacement cartridge must match the original series, voltage rating, protection type, pole configuration, and base structure.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"How do I identify the correct replacement SPD module?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Start with the original SPD label. Confirm the brand or series, model number, Uc or Ucpv rating, SPD type, pole configuration, discharge current rating, remote signal option, and base compatibility before ordering.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can different SPD brands use the same replacement cartridge?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Do not assume they can. Even if the cartridge looks similar, the base keying, contact design, thermal disconnection structure, and remote signal mechanism may be different. Use only confirmed compatible replacements.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"When should the SPD base also be replaced?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Replace or further inspect the base if there are burn marks, terminal damage, loose contacts, melted plastic, broken clips, remote contact problems, or confirmed incompatibility with the new cartridge series.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What should I do when the remote signal alarm is triggered?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Locate the SPD connected to the alarm circuit, check the local indicator window, inspect the cartridge and base, and replace the failed module if confirmed. After replacement, verify that the alarm signal resets correctly.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can a 385V cartridge replace a 275V cartridge?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Not blindly. The Uc rating must match the actual system voltage and protection requirement. A higher Uc may tolerate more voltage fluctuation, but it can also change the protection level. Confirm the system condition before changing voltage ratings.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Can LEEYEE support spare SPD modules for OEM panels?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Yes. For OEM or repeated panel designs, LEEYEE can help check suitable spare SPD modules based on the original SPD series, voltage rating, pole configuration, remote signal requirement, and project quantity.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Should SPDs be checked after lightning?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Yes. After a lightning event or major surge, inspect the SPD indicator, remote alarm status, wiring, grounding condition, and panel condition. Replace the cartridge if the device shows failure or damage.\"\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Do DC PV SPDs also have replaceable cartridges?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"Many DC PV SPDs use plug-in modules, but replacement must match the DC voltage rating, Ucpv, polarity, protection structure, and base series. AC and DC cartridges should not be mixed.\"\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>Maintenance &#038; Replacement Guide Can you replace only the SPD cartridge? When an SPD indicator window turns red, or a remote signal contact sends an alarm, maintenance teams need a clear answer: should the plug-in cartridge be replaced, or does the whole SPD base need to be changed? This guide explains when to replace an&#8230;<\/p>","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,488,422],"tags":[],"class_list":["post-29843","post","type-post","status-publish","format-standard","hentry","category-news","category-surge-protection","category-industry-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SPD Cartridge Replacement Guide | Plug-in SPD Module &amp; Spare Parts<\/title>\n<meta name=\"description\" content=\"Learn when to replace an SPD cartridge, whether you can keep the base, and what model, voltage, remote signal, and compatibility details to confirm before ordering spare SPD 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\/fr\/spd-cartridge-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SPD Cartridge Replacement Guide | Plug-in SPD Module &amp; Spare Parts\" \/>\n<meta property=\"og:description\" content=\"Learn when to replace an SPD cartridge, whether you can keep the base, and what model, voltage, remote signal, and compatibility details to confirm before ordering spare SPD modules.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cnspd.com\/fr\/spd-cartridge-replacement-guide\/\" \/>\n<meta property=\"og:site_name\" content=\"Surge Protector, Surge Arrestor, Isolating Switch - LEEYEE\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-07T05:54:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-07T06:12:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/when-to-replace-an-spd-cartridge.webp\" \/>\n<meta name=\"author\" content=\"Devin Ling\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Devin Ling\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"13 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-cartridge-replacement-guide\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-cartridge-replacement-guide\\\/\"},\"author\":{\"name\":\"Devin Ling\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#\\\/schema\\\/person\\\/f49dbafe62c5b47100ad2d9f88af92d3\"},\"headline\":\"SPD Cartridge Replacement Guide for Maintenance Teams and Panel Builders\",\"datePublished\":\"2026-07-07T05:54:00+00:00\",\"dateModified\":\"2026-07-07T06:12:51+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-cartridge-replacement-guide\\\/\"},\"wordCount\":2690,\"image\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-cartridge-replacement-guide\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.cnspd.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/when-to-replace-an-spd-cartridge.webp\",\"articleSection\":[\"News\",\"Surge Protection\",\"Technical Guides\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-cartridge-replacement-guide\\\/\",\"url\":\"https:\\\/\\\/www.cnspd.com\\\/spd-cartridge-replacement-guide\\\/\",\"name\":\"SPD Cartridge Replacement Guide | Plug-in SPD Module & Spare Parts\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-cartridge-replacement-guide\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-cartridge-replacement-guide\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.cnspd.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/when-to-replace-an-spd-cartridge.webp\",\"datePublished\":\"2026-07-07T05:54:00+00:00\",\"dateModified\":\"2026-07-07T06:12:51+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#\\\/schema\\\/person\\\/f49dbafe62c5b47100ad2d9f88af92d3\"},\"description\":\"Learn when to replace an SPD cartridge, whether you can keep the base, and what model, voltage, remote signal, and compatibility details to confirm before ordering spare SPD modules.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-cartridge-replacement-guide\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.cnspd.com\\\/spd-cartridge-replacement-guide\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-cartridge-replacement-guide\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.cnspd.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/when-to-replace-an-spd-cartridge.webp\",\"contentUrl\":\"https:\\\/\\\/www.cnspd.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/when-to-replace-an-spd-cartridge.webp\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-cartridge-replacement-guide\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.cnspd.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"SPD Cartridge Replacement Guide for Maintenance Teams and Panel Builders\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#website\",\"url\":\"https:\\\/\\\/www.cnspd.com\\\/\",\"name\":\"Surge Protector, Surge Arrestor, Isolating Switch - 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