{"id":25807,"date":"2024-08-30T15:42:41","date_gmt":"2024-08-30T07:42:41","guid":{"rendered":"https:\/\/cnspd.com\/?p=25807"},"modified":"2026-08-26T08:51:24","modified_gmt":"2026-08-26T00:51:24","slug":"type-2-spd","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/id\/spd-tipe-2\/","title":{"rendered":"SPD Tipe 2 (Surge Protective Device): Panduan Pemilihan, Peringkat &#038; Pemasangan"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"25807\" class=\"elementor elementor-25807\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7e874e1d e-con-full e-flex e-con e-parent\" data-id=\"7e874e1d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8c43c67 elementor-widget elementor-widget-html\" data-id=\"8c43c67\" 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>\n  .t2v3 {\n    --blue: #004898;\n    --blue-dark: #00366f;\n    --blue-soft: #eef6ff;\n    --blue-pale: #f7fbff;\n    --text: #1d2939;\n    --muted: #5f6b7a;\n    --border: #d8e5f2;\n    --green: #13795b;\n    --green-soft: #edf9f4;\n    --amber: #9a6700;\n    --amber-soft: #fff8e8;\n    --red: #b42318;\n    --red-soft: #fff2f0;\n    --white: #ffffff;\n    color: var(--text);\n    font-family: inherit;\n    font-size: 16px;\n    line-height: 1.7;\n  }\n\n  .t2v3 *,\n  .t2v3 *::before,\n  .t2v3 *::after {\n    box-sizing: border-box;\n  }\n\n  .t2v3 a {\n    color: var(--blue);\n    text-decoration: none;\n  }\n\n  .t2v3 a:hover {\n    text-decoration: underline;\n  }\n\n  .t2v3 p {\n    margin: 0 0 14px;\n  }\n\n  .t2v3 ul,\n  .t2v3 ol {\n    margin: 11px 0 15px 21px;\n    padding: 0;\n  }\n\n  .t2v3 li {\n    margin: 6px 0;\n  }\n\n  .t2v3-intro {\n    margin: 18px 0 36px;\n    padding: 28px 30px;\n    border: 1px solid 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{\n    padding: 22px;\n    border: 1px solid var(--border);\n    border-radius: 15px;\n    background: #f8fbfe;\n  }\n\n  .t2v3-related h2 {\n    margin-top: 0;\n  }\n\n  .t2v3-related-grid {\n    display: grid;\n    grid-template-columns: repeat(2, minmax(0, 1fr));\n    gap: 10px 20px;\n    margin-top: 15px;\n  }\n\n  .t2v3-related-item {\n    padding-bottom: 9px;\n    border-bottom: 1px solid #dde8f1;\n  }\n\n  .t2v3-related-item strong {\n    display: block;\n  }\n\n  .t2v3-final {\n    margin: 44px 0 20px;\n    padding: 27px;\n    border-radius: 17px;\n    background: var(--blue);\n    color: var(--white);\n  }\n\n  .t2v3-final h2,\n  .t2v3-final p {\n    color: var(--white);\n  }\n\n  .t2v3-final h2 {\n    margin-top: 0;\n  }\n\n  .t2v3-final button.t2v3-btn-primary.leeyee-site-popup-btn {\n    background: #ffffff !important;\n    border-color: #ffffff !important;\n    color: #004898 !important;\n  }\n\n  .t2v3-final button.t2v3-btn-primary.leeyee-site-popup-btn span {\n    color: 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}\n\n    .t2v3-specs {\n      grid-template-columns: 1fr 1fr;\n    }\n\n    .t2v3-table-wrap {\n      margin: 17px 0;\n      overflow: visible;\n      border: 0;\n      background: transparent;\n    }\n\n    .t2v3-table {\n      min-width: 0;\n    }\n\n    .t2v3-table thead {\n      display: none;\n    }\n\n    .t2v3-table,\n    .t2v3-table tbody,\n    .t2v3-table tr,\n    .t2v3-table td {\n      display: block;\n      width: 100%;\n    }\n\n    .t2v3-table tr {\n      margin-bottom: 11px;\n      overflow: hidden;\n      border: 1px solid var(--border);\n      border-radius: 11px;\n      background: var(--white);\n    }\n\n    .t2v3-table td,\n    .t2v3-table tbody tr:nth-child(even) td {\n      position: relative;\n      padding: 9px 12px 9px 41%;\n      border-top: 1px solid #edf2f7;\n      background: var(--white);\n      line-height: 1.5;\n    }\n\n    .t2v3-table td:first-child {\n      border-top: 0;\n    }\n\n    .t2v3-table td::before {\n      content: attr(data-label);\n      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td::before {\n      position: static;\n      display: block;\n      width: auto;\n      margin-bottom: 3px;\n    }\n\n    .t2v3-section {\n      margin: 30px 0;\n    }\n\n    .t2v3-section > h2 {\n      font-size: 23px;\n    }\n  }\n<\/style>\n\n<div class=\"t2v3\">\n\n  <section class=\"t2v3-intro\">\n    <span class=\"t2v3-kicker\">Type 2 Surge Protective Device Guide<\/span>\n\n    <p class=\"t2v3-lead\">\n      A <strong>Type 2 SPD<\/strong> is the most common distribution-level surge protective device used in low-voltage AC systems. It limits transient overvoltages caused by indirect lightning effects, switching operations, motors, transformers and other electrical disturbances before those surges reach downstream equipment.\n    <\/p>\n\n    <div class=\"t2v3-quick\">\n      <strong>Quick answer:<\/strong> In an IEC-based installation, choose a Type 2 SPD when the distribution board or control panel needs protection against induced lightning surges and switching transients but is not required to discharge direct lightning current as a Type 1 SPD. Selection must consider the electrical system, Uc, In, Imax, Up, short-circuit conditions, earthing arrangement, protection mode and installation layout\u2014not only the largest kA number printed on the device.\n    <\/div>\n\n    <div class=\"t2v3-alert t2v3-alert-amber\">\n      <strong>Important for U.S. buyers:<\/strong> an IEC Type 2 SPD and a UL 1449 Type 2 SPD are not automatically equivalent. UL and IEC use different classification and rating frameworks. For a U.S. project, confirm the required UL certification and the exact listed model rather than approving a product from the words \u201cType 2\u201d alone.\n    <\/div>\n\n    <div class=\"t2v3-actions\">\n      <button type=\"button\" class=\"t2v3-btn t2v3-btn-primary leeyee-site-popup-btn\">\n        <span>Ask LEEYEE to Match a Type 2 SPD<\/span>\n      <\/button>\n\n      <a class=\"t2v3-btn t2v3-btn-secondary\" href=\"https:\/\/www.cnspd.com\/shop\/type-2-surge-protective-device\/\">\n        View Type 2 SPD Products\n      <\/a>\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <div id=\"ez-toc-container\" class=\"ez-toc-v2_0_87 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\/id\/spd-tipe-2\/#what-is-a-type-2-spd\" >What Is a Type 2 SPD?<\/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\/id\/spd-tipe-2\/#iec-type-2-vs-ul-1449-type-2\" >IEC Type 2 vs UL 1449 Type 2<\/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\/id\/spd-tipe-2\/#type-1-vs-type-2-vs-type-3-spd\" >Type 1 vs Type 2 vs Type 3 SPD<\/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\/id\/spd-tipe-2\/#where-is-a-type-2-surge-protection-device-installed\" >Where Is a Type 2 Surge Protection Device Installed?<\/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\/id\/spd-tipe-2\/#when-is-type-2-spd-enough\" >When Is Type 2 SPD Enough?<\/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\/id\/spd-tipe-2\/#how-to-select-a-type-2-spd\" >How to Select a Type 2 SPD<\/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\/id\/spd-tipe-2\/#type-2-spd-ratings-uc-in-imax-up-and-short-circuit-capability\" >Type 2 SPD Ratings: Uc, In, Imax, Up and Short-Circuit Capability<\/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\/id\/spd-tipe-2\/#20-ka-40-ka-65-ka-or-80-ka-type-2-spd-which-is-better\" >20 kA, 40 kA, 65 kA or 80 kA Type 2 SPD: Which Is Better?<\/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\/id\/spd-tipe-2\/#type-2-spd-for-tt-tn-s-tn-c-s-tn-c-and-it-systems\" >Type 2 SPD for TT, TN-S, TN-C-S, TN-C and IT Systems<\/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\/id\/spd-tipe-2\/#1pn-2p-3p-3pn-or-4p-type-2-spd\" >1P+N, 2P, 3P, 3P+N or 4P Type 2 SPD?<\/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\/id\/spd-tipe-2\/#how-should-a-type-2-spd-be-installed\" >How Should a Type 2 SPD Be Installed?<\/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\/id\/spd-tipe-2\/#does-a-type-2-spd-need-a-separate-circuit-breaker-or-fuse\" >Does a Type 2 SPD Need a Separate Circuit Breaker or Fuse?<\/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\/id\/spd-tipe-2\/#current-iec-standards-for-type-2-ac-spd\" >Current IEC Standards for Type 2 AC SPD<\/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\/id\/spd-tipe-2\/#type-2-spd-features-that-matter-to-panel-builders-and-oem-buyers\" >Type 2 SPD Features That Matter to Panel Builders and OEM Buyers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-tipe-2\/#recommended-leeyee-type-2-spd-direction\" >Recommended LEEYEE Type 2 SPD Direction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-tipe-2\/#type-2-spd-buyer-checklist\" >Type 2 SPD Buyer Checklist<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-tipe-2\/#common-type-2-spd-selection-mistakes\" >Common Type 2 SPD Selection Mistakes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-tipe-2\/#type-2-spd-faq\" >Type 2 SPD FAQ<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-tipe-2\/#continue-the-type-2-spd-selection-process\" >Continue the Type 2 SPD Selection Process<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-tipe-2\/#need-a-type-2-spd-for-a-distribution-board-or-oem-panel\" >Need a Type 2 SPD for a Distribution Board or OEM Panel?<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"what-is-a-type-2-spd\"><\/span>What Is a Type 2 SPD?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <div class=\"t2v3-answer\">\n      <strong>A Type 2 SPD is a surge protective device designed to limit transient overvoltage in low-voltage power distribution systems.<\/strong> Under the IEC framework, Type 2 testing uses the 8\/20 \u03bcs discharge-current waveform. Type 2 SPDs are commonly installed in main or sub-distribution boards, commercial panels, machine cabinets and industrial control panels.\n    <\/div>\n\n    <p>\n      The device is normally connected in parallel with the power circuit. During normal operation it has very high impedance. When a short-duration surge raises the voltage above the SPD operating threshold, the protective components conduct surge current away from the protected circuit and limit the voltage seen downstream.\n    <\/p>\n\n    <p>\n      Most DIN-rail Type 2 SPDs use voltage-limiting components such as MOVs. Some multi-pole designs also use a voltage-switching N-PE component, particularly in 1+1 or 3+1 configurations.\n    <\/p>\n\n    <div class=\"t2v3-grid\">\n      <div class=\"t2v3-card\">\n        <h3>Indirect lightning<\/h3>\n        <p>Nearby lightning can induce transient voltages into power conductors even when lightning does not directly enter the installation.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Switching transients<\/h3>\n        <p>Motors, transformers, contactors, capacitor banks, HVAC equipment and network switching can generate repetitive transient overvoltages.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Residual surge energy<\/h3>\n        <p>Where a Type 1 or Type 1+2 SPD is installed upstream, a downstream Type 2 SPD can further reduce the voltage stress reaching sensitive loads.<\/p>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"iec-type-2-vs-ul-1449-type-2\"><\/span>IEC Type 2 vs UL 1449 Type 2<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <p>\n      Buyers often search for \u201cType 2 surge protection device\u201d without specifying the standard. The same Type number appears in both IEC and North American documentation, but the classification logic is different.\n    <\/p>\n\n    <div class=\"t2v3-standard\">\n      <div class=\"t2v3-standard-box t2v3-iec\">\n        <h3>IEC Type 2 SPD<\/h3>\n        <ul>\n          <li>Used in IEC-based low-voltage power installations.<\/li>\n          <li>Type 2 duty is associated with an 8\/20 \u03bcs discharge-current waveform.<\/li>\n          <li>Commonly applied at distribution and sub-distribution level.<\/li>\n          <li>Key ratings include Uc, In, Imax and Up.<\/li>\n          <li>Earthing system and protection mode are important selection inputs.<\/li>\n        <\/ul>\n      <\/div>\n\n      <div class=\"t2v3-standard-box t2v3-ul\">\n        <h3>UL 1449 Type 2 SPD<\/h3>\n        <ul>\n          <li>Used within the North American UL certification framework.<\/li>\n          <li>Type 2 installation is on the load side of the service overcurrent protective device.<\/li>\n          <li>Typical rating terminology includes MCOV, VPR, In and SCCR.<\/li>\n          <li>Installation and overcurrent protection must follow the listed product instructions.<\/li>\n          <li>The exact UL listing must cover the quoted model and application.<\/li>\n        <\/ul>\n      <\/div>\n    <\/div>\n\n    <div class=\"t2v3-alert t2v3-alert-blue\">\n      <strong>Procurement rule:<\/strong> \u201cIEC Type 2\u201d does not prove \u201cUL Type 2,\u201d and UL Type 2 does not prove IEC Type 2 compliance. If a specification contains UL 1449, MCOV, VPR or a U.S. service requirement, review the certification separately. See the\n      <a href=\"https:\/\/www.cnspd.com\/ul-1449-vs-iec-61643-spd\/\">UL 1449 vs IEC 61643 SPD guide<\/a>.\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"type-1-vs-type-2-vs-type-3-spd\"><\/span>Type 1 vs Type 2 vs Type 3 SPD<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <p>\n      Type selection starts with surge duty and installation position. Type 2 is not automatically better or weaker than another SPD type; each type has a different test duty and role in coordinated surge protection.\n    <\/p>\n\n    <div class=\"t2v3-table-wrap\">\n      <table class=\"t2v3-table\">\n        <thead>\n          <tr>\n            <th>SPD type<\/th>\n            <th>Main role<\/th>\n            <th>Typical position<\/th>\n            <th>Key IEC test concept<\/th>\n            <th>Buyer question<\/th>\n          <\/tr>\n        <\/thead>\n        <tbody>\n          <tr>\n            <td data-label=\"SPD type\"><strong>Type 1<\/strong><\/td>\n            <td data-label=\"Main role\">Lightning-current protection where partial lightning current can enter the installation.<\/td>\n            <td data-label=\"Typical position\">Origin or incoming distribution level when required by the lightning protection design.<\/td>\n            <td data-label=\"Key IEC test concept\">Lightning impulse-current duty commonly associated with 10\/350 \u03bcs.<\/td>\n            <td data-label=\"Buyer question\">Can lightning current enter this installation?<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"SPD type\"><strong>Type 2<\/strong><\/td>\n            <td data-label=\"Main role\">Limits induced lightning surges, switching surges and residual transient overvoltages.<\/td>\n            <td data-label=\"Typical position\">Main DB where permitted, sub-DB, industrial panel, machine panel or control cabinet.<\/td>\n            <td data-label=\"Key IEC test concept\">8\/20 \u03bcs discharge-current duty.<\/td>\n            <td data-label=\"Buyer question\">What surge protection is required at this distribution level?<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"SPD type\"><strong>Type 3<\/strong><\/td>\n            <td data-label=\"Main role\">Fine protection close to particularly sensitive terminal equipment.<\/td>\n            <td data-label=\"Typical position\">Near the protected load and normally coordinated with upstream protection.<\/td>\n            <td data-label=\"Key IEC test concept\">Lower-energy combination-wave duty.<\/td>\n            <td data-label=\"Buyer question\">Does sensitive equipment need additional local protection?<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n\n    <p>\n      For a deeper comparison, use the dedicated\n      <a href=\"https:\/\/www.cnspd.com\/spd-type1-vs-type2-vs-type-3\/\">Type 1 vs Type 2 vs Type 3 SPD guide<\/a>.\n    <\/p>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"where-is-a-type-2-surge-protection-device-installed\"><\/span>Where Is a Type 2 Surge Protection Device Installed?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <p>\n      Type 2 SPDs are commonly installed where power is distributed toward downstream equipment. Exact location depends on lightning exposure, upstream protection, earthing arrangement, local electrical rules and the required protection level.\n    <\/p>\n\n    <div class=\"t2v3-table-wrap\">\n      <table class=\"t2v3-table\">\n        <thead>\n          <tr>\n            <th>Installation point<\/th>\n            <th>Typical application<\/th>\n            <th>Type 2 role<\/th>\n            <th>What to check<\/th>\n          <\/tr>\n        <\/thead>\n        <tbody>\n          <tr>\n            <td data-label=\"Installation point\"><strong>Main distribution board<\/strong><\/td>\n            <td data-label=\"Typical application\">Commercial or industrial incoming panel<\/td>\n            <td data-label=\"Type 2 role\">Can provide main surge protection where Type 1 lightning-current duty is not required.<\/td>\n            <td data-label=\"What to check\">Lightning exposure, external LPS, incoming supply, earthing system and local rules.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"Installation point\"><strong>Sub-distribution board<\/strong><\/td>\n            <td data-label=\"Typical application\">Floor DB, workshop DB, machine zone<\/td>\n            <td data-label=\"Type 2 role\">Common secondary surge-protection position.<\/td>\n            <td data-label=\"What to check\">Uc, In, Imax, Up, poles, protection mode and upstream SPD coordination.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"Installation point\"><strong>Industrial control panel<\/strong><\/td>\n            <td data-label=\"Typical application\">PLC, VFD, automation or process-control cabinet<\/td>\n            <td data-label=\"Type 2 role\">Limits transient stress on sensitive electronics and control power circuits.<\/td>\n            <td data-label=\"What to check\">Low Up, wiring length, grounding and monitoring requirements.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"Installation point\"><strong>OEM electrical assembly<\/strong><\/td>\n            <td data-label=\"Typical application\">Machine panel, power cabinet or packaged equipment<\/td>\n            <td data-label=\"Type 2 role\">Integrates surge protection into the finished assembly.<\/td>\n            <td data-label=\"What to check\">DIN-rail space, terminal size, remote signal, certificate scope and replacement method.<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n\n    <p>\n      If the main question is which SPD belongs in an MDB, sub-board or control cabinet, see\n      <a href=\"https:\/\/www.cnspd.com\/spd-for-distribution-board\/\">SPD for Distribution Board<\/a>.\n    <\/p>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"when-is-type-2-spd-enough\"><\/span>When Is Type 2 SPD Enough?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <div class=\"t2v3-grid t2v3-grid-2\">\n      <div class=\"t2v3-card\">\n        <h3>Type 2 may be appropriate when<\/h3>\n        <ul>\n          <li>The installation mainly needs protection from induced lightning and switching transients.<\/li>\n          <li>The board is downstream of a Type 1 or Type 1+2 protection stage.<\/li>\n          <li>The SPD at that position is not required to discharge partial direct lightning current.<\/li>\n          <li>The applicable installation rules permit Type 2 at the selected board position.<\/li>\n        <\/ul>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Type 2 alone may not be enough when<\/h3>\n        <ul>\n          <li>An external lightning protection system creates a lightning-current entry risk.<\/li>\n          <li>An exposed or overhead supply requires higher lightning-current duty.<\/li>\n          <li>The project specification explicitly requires Type 1 or Type 1+2.<\/li>\n          <li>The installation position requires direct lightning-current coordination.<\/li>\n        <\/ul>\n      <\/div>\n    <\/div>\n\n    <div class=\"t2v3-alert t2v3-alert-red\">\n      <strong>Do not select SPD Type only from building size or breaker current.<\/strong> A larger switchboard does not automatically require Type 1, and a smaller board does not automatically make Type 2 sufficient. Start with lightning-current exposure, installation position and the applicable electrical rules.\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"how-to-select-a-type-2-spd\"><\/span>How to Select a Type 2 SPD<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <p>\n      For panel builders, distributors and OEM buyers, the safest approach is to approve the SPD in a fixed sequence rather than starting with a single kA value.\n    <\/p>\n\n    <ol class=\"t2v3-decision\">\n      <li>\n        <strong>Confirm the power system.<\/strong><br>\n        Record nominal voltage, frequency, single-phase or three-phase arrangement, neutral availability and earthing system.\n      <\/li>\n      <li>\n        <strong>Confirm Type 2 is the correct SPD duty.<\/strong><br>\n        Check board position, lightning exposure and whether Type 1 or Type 1+2 protection is required upstream.\n      <\/li>\n      <li>\n        <strong>Select Uc for the actual protection mode.<\/strong><br>\n        Maximum continuous operating voltage must suit circuit voltage, expected variation and temporary overvoltage conditions.\n      <\/li>\n      <li>\n        <strong>Check In and Imax separately.<\/strong><br>\n        Nominal discharge current and maximum discharge current describe different parts of Type 2 surge-current performance.\n      <\/li>\n      <li>\n        <strong>Check Up against the protected equipment.<\/strong><br>\n        A low protection level is useful only when installed wiring also keeps additional lead voltage under control.\n      <\/li>\n      <li>\n        <strong>Check short-circuit and backup protection conditions.<\/strong><br>\n        Verify available fault current, SPD short-circuit capability and permitted upstream or dedicated protection.\n      <\/li>\n      <li>\n        <strong>Select the correct poles and protection modes.<\/strong><br>\n        Do not choose 1P, 2P, 3P, 3P+N or 4P from phase count alone. Earthing arrangement and internal circuit matter.\n      <\/li>\n      <li>\n        <strong>Confirm maintenance and procurement requirements.<\/strong><br>\n        Decide whether the project needs pluggable cartridges, visual indication, remote signaling, replacement modules, certificates or OEM labeling.\n      <\/li>\n    <\/ol>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"type-2-spd-ratings-uc-in-imax-up-and-short-circuit-capability\"><\/span>Type 2 SPD Ratings: Uc, In, Imax, Up and Short-Circuit Capability<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <p>\n      A Type 2 SPD should not be selected from the largest surge-current number alone. Voltage suitability, surge-current duty, residual voltage and safe fault-current coordination all matter.\n    <\/p>\n\n    <div class=\"t2v3-table-wrap\">\n      <table class=\"t2v3-table\">\n        <thead>\n          <tr>\n            <th>Rating<\/th>\n            <th>Meaning<\/th>\n            <th>Buyer should confirm<\/th>\n            <th>Common mistake<\/th>\n          <\/tr>\n        <\/thead>\n        <tbody>\n          <tr>\n            <td data-label=\"Rating\"><span class=\"t2v3-tag\">Uc<\/span><\/td>\n            <td data-label=\"Meaning\">Maximum continuous operating voltage under the IEC framework.<\/td>\n            <td data-label=\"Buyer should confirm\">System voltage, protection mode, voltage tolerance and TOV conditions.<\/td>\n            <td data-label=\"Common mistake\">Choosing Uc from nominal voltage alone.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"Rating\"><span class=\"t2v3-tag\">In<\/span><\/td>\n            <td data-label=\"Meaning\">Nominal discharge current for Type 2 8\/20 \u03bcs duty.<\/td>\n            <td data-label=\"Buyer should confirm\">Project requirement and expected repeated surge duty.<\/td>\n            <td data-label=\"Common mistake\">Confusing In with Imax.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"Rating\"><span class=\"t2v3-tag\">Imax<\/span><\/td>\n            <td data-label=\"Meaning\">Maximum discharge current under the Type 2 8\/20 \u03bcs framework.<\/td>\n            <td data-label=\"Buyer should confirm\">The exact model declaration and applicable standard.<\/td>\n            <td data-label=\"Common mistake\">Assuming higher Imax always means better system protection.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"Rating\"><span class=\"t2v3-tag\">Up<\/span><\/td>\n            <td data-label=\"Meaning\">Declared voltage protection level.<\/td>\n            <td data-label=\"Buyer should confirm\">Equipment impulse withstand and installed connection length.<\/td>\n            <td data-label=\"Common mistake\">Ignoring additional voltage from long conductors.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"Rating\"><span class=\"t2v3-tag\">SCCR \/ ISCCR<\/span><\/td>\n            <td data-label=\"Meaning\">Short-circuit capability terminology depends on the applicable standard framework.<\/td>\n            <td data-label=\"Buyer should confirm\">Prospective short-circuit current, coordination data and backup protection.<\/td>\n            <td data-label=\"Common mistake\">Installing without checking fault-current conditions.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"Rating\"><span class=\"t2v3-tag\">TOV<\/span><\/td>\n            <td data-label=\"Meaning\">Temporary overvoltage behaviour.<\/td>\n            <td data-label=\"Buyer should confirm\">System conditions and declared manufacturer performance.<\/td>\n            <td data-label=\"Common mistake\">Treating every abnormal voltage as a short transient surge.<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n\n    <div class=\"t2v3-alert t2v3-alert-green\">\n      <strong>Better procurement question:<\/strong> instead of asking only \u201cDo you have a 40 kA Type 2 SPD?\u201d, send the supplier the system voltage, earthing system, pole configuration, required Uc, In, Imax, Up, short-circuit condition and certification requirement.\n    <\/div>\n\n    <p>\n      For deeper parameter selection, continue with\n      <a href=\"https:\/\/www.cnspd.com\/spd-uc-selection-guide\/\">SPD Uc Selection<\/a>\n      and\n      <a href=\"https:\/\/www.cnspd.com\/spd-up-voltage-protection-level\/\">SPD Up Voltage Protection Level<\/a>.\n    <\/p>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"20-ka-40-ka-65-ka-or-80-ka-type-2-spd-which-is-better\"><\/span>20 kA, 40 kA, 65 kA or 80 kA Type 2 SPD: Which Is Better?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <div class=\"t2v3-answer\">\n      <strong>There is no universal best kA rating.<\/strong> A Type 2 SPD should be selected from the complete specification, not from Imax alone. A lower-kA SPD with correct Uc, appropriate Up and proper short-circuit coordination may be more suitable than a higher-kA device selected only from its headline current value.\n    <\/div>\n\n    <div class=\"t2v3-grid\">\n      <div class=\"t2v3-card\">\n        <h3>In matters<\/h3>\n        <p>In represents nominal Type 2 discharge-current duty. Check it independently from the maximum Imax value.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Up matters<\/h3>\n        <p>Protected equipment sees voltage stress, so voltage limitation and installed connection layout matter as much as surge-current capacity.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>System coordination matters<\/h3>\n        <p>The SPD must remain safe under available fault current and the declared upstream or backup protection arrangement.<\/p>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"type-2-spd-for-tt-tn-s-tn-c-s-tn-c-and-it-systems\"><\/span>Type 2 SPD for TT, TN-S, TN-C-S, TN-C and IT Systems<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <p>\n      Earthing arrangement changes available conductors and required surge-protection paths. Two Type 2 SPDs with the same Uc and kA rating may therefore not be interchangeable.\n    <\/p>\n\n    <div class=\"t2v3-table-wrap\">\n      <table class=\"t2v3-table\">\n        <thead>\n          <tr>\n            <th>System<\/th>\n            <th>Selection issue<\/th>\n            <th>Typical direction<\/th>\n            <th>Buyer warning<\/th>\n          <\/tr>\n        <\/thead>\n        <tbody>\n          <tr>\n            <td data-label=\"System\"><strong>TT<\/strong><\/td>\n            <td data-label=\"Selection issue\">Neutral and PE are separate; N-PE protection is important.<\/td>\n            <td data-label=\"Typical direction\">1+1 or 3+1 arrangements are common where suitable.<\/td>\n            <td data-label=\"Buyer warning\">Check N-PE component type, RCD coordination and manufacturer wiring.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"System\"><strong>TN-S<\/strong><\/td>\n            <td data-label=\"Selection issue\">N and PE are separate conductors.<\/td>\n            <td data-label=\"Typical direction\">3+1 or 4+0 designs may both appear depending on the protection concept.<\/td>\n            <td data-label=\"Buyer warning\">Do not assume TN-S automatically means one pole configuration.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"System\"><strong>TN-C-S<\/strong><\/td>\n            <td data-label=\"Selection issue\">PEN is combined upstream and split into N and PE downstream.<\/td>\n            <td data-label=\"Typical direction\">SPD choice changes depending on whether installation is before or after the PEN split.<\/td>\n            <td data-label=\"Buyer warning\">Installation position must be identified before ordering.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"System\"><strong>TN-C<\/strong><\/td>\n            <td data-label=\"Selection issue\">There is a PEN conductor but no separate N and PE at the installation point.<\/td>\n            <td data-label=\"Typical direction\">Three-pole protection to PEN is common for three-phase systems.<\/td>\n            <td data-label=\"Buyer warning\">Do not specify a 3P+N structure before separate N and PE exist.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"System\"><strong>IT<\/strong><\/td>\n            <td data-label=\"Selection issue\">System voltage to earth and fault behaviour require special consideration.<\/td>\n            <td data-label=\"Typical direction\">Use an SPD specifically declared for the intended IT system.<\/td>\n            <td data-label=\"Buyer warning\">Do not copy a TT or TN selection without checking the project design.<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n\n    <p>\n      For three-phase pole selection, see\n      <a href=\"https:\/\/www.cnspd.com\/3pn-spd-vs-4p-spd\/\">3P+N SPD vs 4P SPD<\/a>.\n    <\/p>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"1pn-2p-3p-3pn-or-4p-type-2-spd\"><\/span>1P+N, 2P, 3P, 3P+N or 4P Type 2 SPD?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <p>\n      Pole count should follow the electrical system and internal protection circuit. The physical number of modules does not by itself tell you whether the SPD uses L-N, L-PE, N-PE, 3+1 or 4+0 protection.\n    <\/p>\n\n    <div class=\"t2v3-grid\">\n      <div class=\"t2v3-card\">\n        <h3>Single-phase<\/h3>\n        <p>1P+N and 2P Type 2 SPDs are both used. Confirm whether the design requires an N-PE switching path and which protection mode is specified.<\/p>\n        <p><a href=\"https:\/\/www.cnspd.com\/single-phase-spd-wiring-diagram\/\">See single-phase SPD wiring<\/a>.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Three-phase without separate neutral<\/h3>\n        <p>A 3P arrangement may be suitable where L1, L2 and L3 require protection according to the network design.<\/p>\n        <p><a href=\"https:\/\/www.cnspd.com\/three-phase-spd-wiring-diagram\/\">See three-phase SPD wiring<\/a>.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Three-phase with neutral<\/h3>\n        <p>3P+N \/ 3+1 and 4P \/ 4+0 structures can look similar externally but may have different N-PE protection behaviour.<\/p>\n        <p><a href=\"https:\/\/www.cnspd.com\/3pn-spd-vs-4p-spd\/\">Compare 3+1 and 4+0<\/a>.<\/p>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"how-should-a-type-2-spd-be-installed\"><\/span>How Should a Type 2 SPD Be Installed?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <p>\n      Correct SPD selection can still result in poor protection if panel layout creates long surge-current paths. Installation geometry is part of the protection system.\n    <\/p>\n\n    <div class=\"t2v3-grid\">\n      <div class=\"t2v3-card\">\n        <div class=\"t2v3-number\">1<\/div>\n        <h3>Keep the surge path short<\/h3>\n        <p>Keep conductors between supply connection, SPD and PE\/PEN connection as short and straight as practical.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <div class=\"t2v3-number\">2<\/div>\n        <h3>Avoid unnecessary loops<\/h3>\n        <p>Do not route SPD conductors around the enclosure for appearance or service loops.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <div class=\"t2v3-number\">3<\/div>\n        <h3>Coordinate overcurrent protection<\/h3>\n        <p>Confirm whether the SPD relies on upstream protection or requires a dedicated fuse or breaker.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <div class=\"t2v3-number\">4<\/div>\n        <h3>Check the earth connection<\/h3>\n        <p>The SPD needs a low-impedance route to the applicable PE, PEN or equipotential-bonding point.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <div class=\"t2v3-number\">5<\/div>\n        <h3>Check RCD coordination<\/h3>\n        <p>SPD position relative to an RCD depends on network configuration, protection arrangement and applicable installation rules.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <div class=\"t2v3-number\">6<\/div>\n        <h3>Allow replacement access<\/h3>\n        <p>Commercial and industrial panels should provide enough space for status inspection and cartridge replacement.<\/p>\n      <\/div>\n    <\/div>\n\n    <div class=\"t2v3-alert t2v3-alert-blue\">\n      <strong>The 0.5 m principle:<\/strong> IEC-based installation guidance commonly uses an approximately 0.5 m combined connection-path target for conventional SPD wiring where practicable. This is the complete relevant surge-current path\u2014not automatically 0.5 m for every individual conductor.\n      Read the\n      <a href=\"https:\/\/www.cnspd.com\/spd-cable-length-0-5m\/\">SPD cable length and 0.5 m guide<\/a>.\n    <\/div>\n\n    <p>\n      For a complete Clause 534 workflow covering position, cable length, backup protection, RCD coordination and earthing systems, see\n      <a href=\"https:\/\/www.cnspd.com\/iec-60364-5-534-spd-installation\/\">IEC 60364-5-53 Clause 534 SPD Installation Guide<\/a>.\n    <\/p>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"does-a-type-2-spd-need-a-separate-circuit-breaker-or-fuse\"><\/span>Does a Type 2 SPD Need a Separate Circuit Breaker or Fuse?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <div class=\"t2v3-answer\">\n      <strong>Not every Type 2 SPD automatically needs the same separate breaker or fuse.<\/strong> The correct arrangement depends on SPD design, internal disconnection, manufacturer backup-protection limits, upstream OCPD and prospective short-circuit current.\n    <\/div>\n\n    <p>\n      A dedicated protective device may be required in one installation while another SPD can coordinate with the existing upstream fuse or circuit breaker. The selected arrangement must remain within the manufacturer\u2019s declared conditions.\n    <\/p>\n\n    <div class=\"t2v3-alert t2v3-alert-red\">\n      <strong>Do not choose the backup breaker from SPD Imax.<\/strong> Surge-current ratings such as In and Imax are not the normal 50\/60 Hz overcurrent rating of the branch circuit.\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"current-iec-standards-for-type-2-ac-spd\"><\/span>Current IEC Standards for Type 2 AC SPD<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <p>\n      Many older pages still cite only earlier IEC editions. Current procurement should check the standard edition actually required by the destination market and project specification.\n    <\/p>\n\n    <div class=\"t2v3-table-wrap\">\n      <table class=\"t2v3-table\">\n        <thead>\n          <tr>\n            <th>Standard<\/th>\n            <th>Relevance<\/th>\n            <th>Buyer meaning<\/th>\n          <\/tr>\n        <\/thead>\n        <tbody>\n          <tr>\n            <td data-label=\"Standard\"><strong>IEC 61643-01:2024<\/strong><\/td>\n            <td data-label=\"Relevance\">Common requirements and test methods for low-voltage SPDs.<\/td>\n            <td data-label=\"Buyer meaning\">General requirements used together with application-specific IEC 61643 parts.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"Standard\"><strong>IEC 61643-11:2025<\/strong><\/td>\n            <td data-label=\"Relevance\">AC low-voltage surge protective devices.<\/td>\n            <td data-label=\"Buyer meaning\">Current IEC AC SPD requirements are applied together with IEC 61643-01.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"Standard\"><strong>IEC 60364-5-53, Clause 534<\/strong><\/td>\n            <td data-label=\"Relevance\">Selection and erection of SPDs within electrical installations.<\/td>\n            <td data-label=\"Buyer meaning\">Covers installation-level decisions that a product datasheet alone cannot answer.<\/td>\n          <\/tr>\n          <tr>\n            <td data-label=\"Standard\"><strong>UL 1449<\/strong><\/td>\n            <td data-label=\"Relevance\">North American SPD product certification framework.<\/td>\n            <td data-label=\"Buyer meaning\">UL projects should verify the exact listed model and permitted installation conditions.<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n\n    <div class=\"t2v3-alert t2v3-alert-amber\">\n      <strong>Certificate note:<\/strong> a new IEC publication does not mean every national standard, EN adoption, project specification or existing certificate changes on the same day. Confirm the edition required by the destination market and project documents.\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"type-2-spd-features-that-matter-to-panel-builders-and-oem-buyers\"><\/span>Type 2 SPD Features That Matter to Panel Builders and OEM Buyers<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <div class=\"t2v3-grid\">\n      <div class=\"t2v3-card\">\n        <h3>Pluggable cartridge<\/h3>\n        <p>Allows replacement of a failed protection module without replacing the complete base, where supported by the product design.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Visual status indicator<\/h3>\n        <p>Gives maintenance teams a quick indication of whether the protection module remains serviceable.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Remote signal contact<\/h3>\n        <p>Useful in unmanned panels, industrial automation and projects requiring remote SPD status monitoring.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Replaceable N-PE module<\/h3>\n        <p>Important in 1+1 or 3+1 assemblies where the N-PE protection path differs from phase protection modules.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Clear terminal data<\/h3>\n        <p>Terminal capacity, conductor range and tightening torque affect real panel assembly and production QC.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Documented backup coordination<\/h3>\n        <p>Panel builders need backup fuse or breaker limits and short-circuit data before final approval.<\/p>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"recommended-leeyee-type-2-spd-direction\"><\/span>Recommended LEEYEE Type 2 SPD Direction<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <p>\n      LEEYEE supplies Type 2 DIN-rail surge protective devices for distribution boards, industrial panels, control cabinets and OEM electrical assemblies. Final model selection should be based on the actual electrical system rather than a generic \u201cType 2\u201d request.\n    <\/p>\n\n    <div class=\"t2v3-product\">\n      <div class=\"t2v3-product-head\">\n        <div>\n          <span class=\"t2v3-tag\">Type 2 \/ AC \/ 3P+N<\/span>\n          <h3>LY1-C40\/3(S)+1 Pluggable Multi-Pole SPD<\/h3>\n        <\/div>\n\n        <a class=\"t2v3-btn t2v3-btn-secondary\" href=\"https:\/\/www.cnspd.com\/ly1-c403s1pluggable-multi-pole-spd-product\/\">\n          View Product\n        <\/a>\n      <\/div>\n\n      <p>\n        A DIN-rail Type 2 SPD option for three-phase distribution boards and electrical panels using a 3P+N \/ 3+1 protection arrangement.\n      <\/p>\n\n      <div class=\"t2v3-specs\">\n        <div class=\"t2v3-spec\">\n          <strong>SPD Type<\/strong>\n          Type 2\n        <\/div>\n        <div class=\"t2v3-spec\">\n          <strong>In<\/strong>\n          20 kA\n        <\/div>\n        <div class=\"t2v3-spec\">\n          <strong>Imax<\/strong>\n          40 kA\n        <\/div>\n        <div class=\"t2v3-spec\">\n          <strong>Mounting<\/strong>\n          DIN rail\n        <\/div>\n      <\/div>\n\n      <p class=\"t2v3-small\">\n        Exact Uc, pole configuration, protection mode, certificate scope and backup-protection requirements must be confirmed for the required model and project.\n      <\/p>\n    <\/div>\n\n    <div class=\"t2v3-actions\">\n      <button type=\"button\" class=\"t2v3-btn t2v3-btn-primary leeyee-site-popup-btn\">\n        <span>Request Type 2 Model Selection<\/span>\n      <\/button>\n\n      <a class=\"t2v3-btn t2v3-btn-secondary\" href=\"https:\/\/www.cnspd.com\/type-2-din-rail-surge-protector\/\">\n        Type 2 DIN Rail SPD Series\n      <\/a>\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"type-2-spd-buyer-checklist\"><\/span>Type 2 SPD Buyer Checklist<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <p>\n      Send these details when requesting a quotation or technical model match. They reduce back-and-forth and help prevent incorrect substitutions.\n    <\/p>\n\n    <ul class=\"t2v3-checklist\">\n      <li>Destination market and required standard<\/li>\n      <li>Main DB, sub-DB, control panel or OEM assembly<\/li>\n      <li>Nominal AC system voltage<\/li>\n      <li>Single-phase or three-phase<\/li>\n      <li>TT, TN-S, TN-C-S, TN-C or IT system<\/li>\n      <li>1P+N, 2P, 3P, 3P+N or 4P requirement<\/li>\n      <li>Required Uc or system voltage condition<\/li>\n      <li>Required In and Imax<\/li>\n      <li>Required Up<\/li>\n      <li>Prospective short-circuit current if known<\/li>\n      <li>Backup fuse or breaker condition<\/li>\n      <li>Visual indicator or remote signal requirement<\/li>\n      <li>Pluggable or monoblock construction<\/li>\n      <li>Certificate and test-report requirement<\/li>\n      <li>OEM logo, packaging or labeling requirement<\/li>\n      <li>Order quantity and delivery schedule<\/li>\n    <\/ul>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"common-type-2-spd-selection-mistakes\"><\/span>Common Type 2 SPD Selection Mistakes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <div class=\"t2v3-grid t2v3-grid-2\">\n      <div class=\"t2v3-card\">\n        <h3>Choosing only by Imax<\/h3>\n        <p>A high Imax cannot compensate for incorrect Uc, poor Up coordination, unsuitable protection mode or inadequate short-circuit coordination.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Assuming Type 2 means the same worldwide<\/h3>\n        <p>IEC Type 2 and UL Type 2 belong to different standards frameworks. Certification must be checked separately.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Choosing pole count from phase count alone<\/h3>\n        <p>A four-module SPD can use different internal circuits. Check 3+1 versus 4+0 and the N-PE protection path.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Ignoring conductor length<\/h3>\n        <p>Declared SPD Up is not automatically the voltage seen by the load after long wiring adds inductive voltage.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Adding a random backup MCB<\/h3>\n        <p>Backup protection should come from manufacturer coordination data, not a generic SPD-to-breaker formula.<\/p>\n      <\/div>\n\n      <div class=\"t2v3-card\">\n        <h3>Using an AC SPD on PV DC<\/h3>\n        <p>PV DC protection requires an SPD specifically designed and rated for the photovoltaic DC circuit.<\/p>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <h2><span class=\"ez-toc-section\" id=\"type-2-spd-faq\"><\/span>Type 2 SPD FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <div class=\"t2v3-faq\">\n\n      <details>\n        <summary>What does Type 2 SPD mean?<\/summary>\n        <div class=\"t2v3-faq-body\">\n          <p>In the IEC framework, a Type 2 SPD is a surge protective device with Type 2 surge-current test duty based on an 8\/20 \u03bcs waveform. It is commonly used at distribution and sub-distribution level to limit induced lightning and switching transient overvoltages.<\/p>\n        <\/div>\n      <\/details>\n\n      <details>\n        <summary>Is a Type 2 SPD the same as a Class II SPD?<\/summary>\n        <div class=\"t2v3-faq-body\">\n          <p>IEC and EN product catalogs often use Class II wording for devices associated with Type 2 8\/20 \u03bcs duty. For procurement, verify the actual standard and test declaration rather than relying only on the Class II label.<\/p>\n        <\/div>\n      <\/details>\n\n      <details>\n        <summary>Where should a Type 2 SPD be installed?<\/summary>\n        <div class=\"t2v3-faq-body\">\n          <p>Type 2 SPDs are commonly installed in main distribution boards where Type 1 duty is not required, sub-distribution boards, industrial panels, machine cabinets and control panels.<\/p>\n        <\/div>\n      <\/details>\n\n      <details>\n        <summary>Can a Type 2 SPD be used without a Type 1 SPD?<\/summary>\n        <div class=\"t2v3-faq-body\">\n          <p>Yes, where Type 1 lightning-current protection is not required at that installation point and applicable electrical rules permit Type 2 protection. If partial direct lightning current may enter the installation, Type 1 or Type 1+2 protection may be required upstream.<\/p>\n        <\/div>\n      <\/details>\n\n      <details>\n        <summary>What kA rating should a Type 2 SPD have?<\/summary>\n        <div class=\"t2v3-faq-body\">\n          <p>There is no universal kA value for every installation. Compare In and Imax separately and also check Uc, Up, earthing system, protection mode, short-circuit conditions and project requirements.<\/p>\n        <\/div>\n      <\/details>\n\n      <details>\n        <summary>Is 40 kA better than 20 kA for a Type 2 SPD?<\/summary>\n        <div class=\"t2v3-faq-body\">\n          <p>A higher discharge-current rating can provide greater surge-current capacity under its defined test conditions, but it does not automatically make the SPD better for a specific installation. Voltage compatibility, Up, repeated-duty performance, wiring and short-circuit coordination also matter.<\/p>\n        <\/div>\n      <\/details>\n\n      <details>\n        <summary>Does a Type 2 SPD need a circuit breaker?<\/summary>\n        <div class=\"t2v3-faq-body\">\n          <p>It depends on the SPD and installation. Some designs coordinate with the existing upstream protective device, while others require a dedicated fuse or breaker. Follow manufacturer backup-protection and short-circuit coordination instructions.<\/p>\n        <\/div>\n      <\/details>\n\n      <details>\n        <summary>What is the difference between Uc and Up?<\/summary>\n        <div class=\"t2v3-faq-body\">\n          <p>Uc is the maximum continuous operating voltage for an IEC SPD. Up is the declared voltage protection level during surge operation. Uc determines continuous voltage suitability, while Up helps evaluate transient voltage reaching downstream equipment.<\/p>\n        <\/div>\n      <\/details>\n\n      <details>\n        <summary>What is the difference between In and Imax?<\/summary>\n        <div class=\"t2v3-faq-body\">\n          <p>In is the nominal discharge current used for defined Type 2 duty testing. Imax is the maximum discharge current declared for the Type 2 SPD under the applicable test framework.<\/p>\n        <\/div>\n      <\/details>\n\n      <details>\n        <summary>Can I use an IEC Type 2 SPD in a U.S. project?<\/summary>\n        <div class=\"t2v3-faq-body\">\n          <p>Only if the project and authority having jurisdiction accept the actual product certification and installation conditions. IEC Type 2 wording does not establish UL 1449 Type 2 certification.<\/p>\n        <\/div>\n      <\/details>\n\n      <details>\n        <summary>Can a Type 2 SPD protect against a direct lightning strike?<\/summary>\n        <div class=\"t2v3-faq-body\">\n          <p>A standard IEC Type 2 SPD is not a substitute for Type 1 lightning-current protection where partial direct lightning current can enter the electrical installation. Type 2 normally addresses induced, switching and residual surge energy.<\/p>\n        <\/div>\n      <\/details>\n\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-section\">\n    <div class=\"t2v3-related\">\n      <h2><span class=\"ez-toc-section\" id=\"continue-the-type-2-spd-selection-process\"><\/span>Continue the Type 2 SPD Selection Process<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n      <div class=\"t2v3-related-grid\">\n        <div class=\"t2v3-related-item\">\n          <strong><a href=\"https:\/\/www.cnspd.com\/shop\/type-2-surge-protective-device\/\">Type 2 SPD Products<\/a><\/strong>\n          Compare Type 2 product options for procurement and OEM requirements.\n        <\/div>\n\n        <div class=\"t2v3-related-item\">\n          <strong><a href=\"https:\/\/www.cnspd.com\/type-2-din-rail-surge-protector\/\">Type 2 DIN Rail Surge Protector<\/a><\/strong>\n          DIN-rail construction, panel integration and product-family selection.\n        <\/div>\n\n        <div class=\"t2v3-related-item\">\n          <strong><a href=\"https:\/\/www.cnspd.com\/spd-for-distribution-board\/\">SPD for Distribution Board<\/a><\/strong>\n          Decide where Type 2 or Type 1+2 belongs in an MDB or sub-DB.\n        <\/div>\n\n        <div class=\"t2v3-related-item\">\n          <strong><a href=\"https:\/\/www.cnspd.com\/spd-type1-vs-type2-vs-type-3\/\">Type 1 vs Type 2 vs Type 3<\/a><\/strong>\n          Compare SPD types without mixing their search intents.\n        <\/div>\n\n        <div class=\"t2v3-related-item\">\n          <strong><a href=\"https:\/\/www.cnspd.com\/spd-uc-selection-guide\/\">SPD Uc Selection<\/a><\/strong>\n          Compare Uc selection logic for AC systems.\n        <\/div>\n\n        <div class=\"t2v3-related-item\">\n          <strong><a href=\"https:\/\/www.cnspd.com\/spd-up-voltage-protection-level\/\">SPD Up Voltage Protection Level<\/a><\/strong>\n          Understand residual voltage and equipment coordination.\n        <\/div>\n\n        <div class=\"t2v3-related-item\">\n          <strong><a href=\"https:\/\/www.cnspd.com\/spd-cable-length-0-5m\/\">SPD 0.5 m Cable Length Rule<\/a><\/strong>\n          Apply correct connection-length practice inside panels.\n        <\/div>\n\n        <div class=\"t2v3-related-item\">\n          <strong><a href=\"https:\/\/www.cnspd.com\/ul-1449-vs-iec-61643-spd\/\">UL 1449 vs IEC 61643<\/a><\/strong>\n          Avoid incorrect UL-to-IEC Type and rating conversions.\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"t2v3-final\">\n    <h2><span class=\"ez-toc-section\" id=\"need-a-type-2-spd-for-a-distribution-board-or-oem-panel\"><\/span>Need a Type 2 SPD for a Distribution Board or OEM Panel?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n    <p>\n      Send LEEYEE the system voltage, phase arrangement, earthing system, installation position, required Uc, In, Imax, Up, pole configuration and certification requirement. We can help narrow the suitable Type 2 SPD before quotation.\n    <\/p>\n\n    <div class=\"t2v3-actions\">\n      <button type=\"button\" class=\"t2v3-btn t2v3-btn-primary leeyee-site-popup-btn\">\n        <span>Get a Type 2 SPD Recommendation<\/span>\n      <\/button>\n\n      <a class=\"t2v3-btn t2v3-btn-secondary\" href=\"https:\/\/www.cnspd.com\/shop\/type-2-surge-protective-device\/\">\n        View Type 2 SPD Range\n      <\/a>\n    <\/div>\n  <\/section>\n\n<\/div>\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does Type 2 SPD mean?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"In the IEC framework, a Type 2 SPD is a surge protective device with Type 2 surge-current test duty based on an 8\/20 microsecond waveform. It is commonly used at distribution and sub-distribution level to limit induced lightning and switching transient overvoltages.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can a Type 2 SPD be used without a Type 1 SPD?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, where Type 1 lightning-current protection is not required at that installation point and applicable electrical rules permit Type 2 protection. If partial direct lightning current can enter the installation, Type 1 or Type 1+2 protection may be required upstream.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What kA rating should a Type 2 SPD have?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"There is no universal kA value for every installation. In and Imax should be checked together with Uc, Up, earthing system, protection mode, short-circuit conditions and project requirements.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does a Type 2 SPD need a circuit breaker?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"It depends on the SPD and installation. Some SPDs coordinate with the existing upstream protective device while others require a dedicated fuse or breaker. Follow the exact manufacturer's backup-protection and short-circuit coordination instructions.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is an IEC Type 2 SPD the same as a UL 1449 Type 2 SPD?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. IEC and UL use different Type classification and rating frameworks. An IEC Type 2 declaration does not establish UL 1449 Type 2 certification, and the exact listed model must be verified where UL certification is required.\"\n      }\n    }\n  ]\n}\n<\/script>\n\n<script>\n(function () {\n  document.addEventListener('click', function (event) {\n    var button = event.target.closest('.leeyee-site-popup-btn');\n    if (!button) return;\n\n    event.preventDefault();\n\n    var trigger = document.querySelector('.w-popup.ush_popup_1 .w-popup-trigger');\n\n    if (trigger) {\n      trigger.click();\n    }\n  });\n})();\n<\/script>\t\t\t\t<\/div>\n\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>Type 2 Surge Protective Device GuideA Type 2 SPD is the most common distribution-level surge protective device used in low-voltage AC systems. It limits transient overvoltages caused by indirect lightning effects, switching operations, motors, transformers and other electrical disturbances before those surges reach downstream equipment. Quick answer: In an IEC-based installation, choose a Type 2&#8230;<\/p>","protected":false},"author":18,"featured_media":26085,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,488,422],"tags":[],"class_list":["post-25807","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-surge-protection","category-industry-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Type 2 SPD Guide: Selection, Ratings &amp; Installation | LEEYEE<\/title>\n<meta name=\"description\" content=\"Learn how to select a Type 2 SPD for AC distribution boards, including IEC vs UL terminology, Uc, In, Imax, Up, earthing systems, wiring and backup protection.\" \/>\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\/id\/spd-tipe-2\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Type 2 SPD Guide: Selection, Ratings &amp; Installation | LEEYEE\" \/>\n<meta property=\"og:description\" content=\"Learn how to select a Type 2 SPD for AC distribution boards, including IEC vs UL terminology, Uc, In, Imax, Up, earthing systems, wiring and backup protection.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cnspd.com\/id\/spd-tipe-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Surge Protector, Surge Arrestor, Isolating Switch - LEEYEE\" \/>\n<meta property=\"article:published_time\" content=\"2024-08-30T07:42:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-26T00:51:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2024\/08\/0.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"530\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Devin Ling\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Ditulis oleh\" \/>\n\t<meta name=\"twitter:data1\" content=\"Devin Ling\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimasi waktu membaca\" \/>\n\t<meta name=\"twitter:data2\" content=\"16 menit\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/type-2-spd\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/type-2-spd\\\/\"},\"author\":{\"name\":\"Devin Ling\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#\\\/schema\\\/person\\\/f49dbafe62c5b47100ad2d9f88af92d3\"},\"headline\":\"Type 2 SPD (Surge Protective Device): Selection, Ratings &#038; 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