{"id":29517,"date":"2026-06-23T08:45:51","date_gmt":"2026-06-23T00:45:51","guid":{"rendered":"https:\/\/www.cnspd.com\/?page_id=29517"},"modified":"2026-06-23T10:48:56","modified_gmt":"2026-06-23T02:48:56","slug":"29517-2","status":"publish","type":"page","link":"https:\/\/www.cnspd.com\/fr\/type-1-2-spd\/","title":{"rendered":"Type 1+2 SPD: What It Means and When to Use It"},"content":{"rendered":"<section class=\"l-section wpb_row height_large width_full\"><div class=\"l-section-h i-cf\"><div class=\"g-cols vc_row via_grid cols_1 laptops-cols_inherit tablets-cols_inherit mobiles-cols_1 valign_top type_default stacking_default\"><div class=\"wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"w-html us_custom_f15df953\"><style>\n\/* =========================================================\n   LEEYEE TYPE 1+2 SPD PAGE\n   Selection-focused page version\n   Use inside WordPress Custom HTML\n========================================================= 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border: 1px solid var(--line);\n  border-radius: 12px;\n  background: #fff;\n  color: var(--text) !important;\n  font-weight: 800;\n  text-decoration: none !important;\n}\n\n.leeyee-t12-related a:hover {\n  border-color: var(--blue);\n  color: var(--blue) !important;\n}\n\n.leeyee-t12-related span {\n  display: block;\n  margin-top: 5px;\n  color: var(--muted);\n  font-size: 13px;\n  font-weight: 400;\n}\n\n\/* Mobile table cards *\/\n@media (max-width: 767px) {\n  .leeyee-t12-table-wrap {\n    overflow-x: visible !important;\n    border: 0 !important;\n    background: transparent !important;\n  }\n\n  .leeyee-t12-table {\n    display: block !important;\n    min-width: 0 !important;\n    width: 100% !important;\n  }\n\n  .leeyee-t12-table thead {\n    display: none !important;\n  }\n\n  .leeyee-t12-table tbody {\n    display: grid !important;\n    gap: 14px !important;\n  }\n\n  .leeyee-t12-table tr {\n    display: block !important;\n    overflow: hidden !important;\n    border: 1px solid var(--line) !important;\n    border-radius: 12px !important;\n    background: #fff !important;\n  }\n\n  .leeyee-t12-table td {\n    display: block !important;\n    width: 100% !important;\n    padding: 12px 15px !important;\n    border-right: 0 !important;\n    border-bottom: 1px solid var(--line) !important;\n    font-size: 14px !important;\n    text-align: left !important;\n  }\n\n  .leeyee-t12-table td:last-child {\n    border-bottom: 0 !important;\n  }\n\n  .leeyee-t12-table td:first-child {\n    background: var(--blue) !important;\n    color: #fff !important;\n    font-size: 16px !important;\n    font-weight: 800 !important;\n  }\n\n  .leeyee-t12-table td:not(:first-child)::before {\n    display: block !important;\n    margin-bottom: 4px !important;\n    color: var(--blue) !important;\n    font-size: 12px !important;\n    font-weight: 800 !important;\n    text-transform: uppercase !important;\n    letter-spacing: .04em !important;\n  }\n\n  #combined-vs-separate .leeyee-t12-table td:nth-child(2)::before {\n    content: \"Type 1+2 SPD\";\n  }\n\n  #combined-vs-separate .leeyee-t12-table td:nth-child(3)::before {\n    content: \"Separate Type 1 + Type 2\";\n  }\n\n  #selection-guide .leeyee-t12-table td:nth-child(2)::before {\n    content: \"Initial direction\";\n  }\n\n  #ac-vs-pv .leeyee-t12-table td:nth-child(2)::before {\n    content: \"AC Type 1+2 SPD\";\n  }\n\n  #ac-vs-pv .leeyee-t12-table td:nth-child(3)::before {\n    content: \"PV DC Type 1+2 SPD\";\n  }\n}\n\n@media (max-width: 900px) {\n  .leeyee-t12-product-visual {\n    position: static;\n    max-width: 100%;\n    margin-left: 0;\n    margin-top: 0;\n  }\n\n  .leeyee-t12-product-image {\n    min-height: 0;\n    padding: 20px;\n  }\n\n\n  .leeyee-t12-hero-grid,\n  .leeyee-t12-grid-2,\n  .leeyee-t12-grid-3,\n  .leeyee-t12-rating-grid,\n  .leeyee-t12-related {\n    grid-template-columns: 1fr;\n  }\n\n  .leeyee-t12-hero {\n    padding: 66px 0 58px;\n  }\n}\n\n@media (max-width: 600px) {\n  .leeyee-t12 {\n    font-size: 15px;\n  }\n\n  .leeyee-t12-container {\n    width: min(100% - 28px, 1120px);\n  }\n\n  .leeyee-t12-section {\n    padding: 52px 0;\n  }\n\n  .leeyee-t12-hero-card,\n  .leeyee-t12-cta-band {\n    padding: 22px;\n  }\n\n  .leeyee-t12-quick-item {\n    display: block;\n  }\n\n  .leeyee-t12-quick-item b {\n    display: block;\n    margin-bottom: 3px;\n  }\n\n  .leeyee-t12-hero-actions {\n    display: grid;\n  }\n\n  .leeyee-t12-btn {\n    width: 100%;\n  }\n}\n<\/style>\n\n<div class=\"leeyee-t12\">\n\n  <section class=\"leeyee-t12-hero\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-hero-grid\">\n        <div>\n          <div class=\"leeyee-t12-kicker\">Type 1+2 SPD Selection Guide<\/div>\n\n          <h1>Type 1+2 SPD: What It Means and When to Use It<\/h1>\n\n          <p class=\"leeyee-t12-hero-lead\">\n            A Type 1+2 SPD combines Class I lightning-current duty and Class II\n            distribution-level surge protection in one device. It is commonly\n            used at the origin of an installation where both Type 1 and Type 2\n            protection duties are required.\n          <\/p>\n\n          <div class=\"leeyee-t12-hero-actions\">\n            <button type=\"button\" class=\"leeyee-t12-btn leeyee-t12-btn-white leeyee-site-popup-btn\" aria-label=\"Request Type 1+2 SPD Selection\">\n              <span class=\"w-btn-label\">Request Type 1+2 SPD Selection<\/span>\n            <\/button>\n\n            <a class=\"leeyee-t12-btn leeyee-t12-btn-ghost\" href=\"https:\/\/www.cnspd.com\/spd-type1-vs-type2-vs-type-3\/\" target=\"_blank\" rel=\"noopener\">\n              Compare All SPD Types\n            <\/a>\n          <\/div>\n        <\/div>\n\n        <div class=\"leeyee-t12-hero-card\">\n          <div class=\"leeyee-t12-direct\">\n            <strong>Direct answer:<\/strong>\n            Type 1+2 SPD means a surge protective device tested for both Type 1\n            and Type 2 duties. It can discharge partial lightning current and\n            limit surge overvoltage at the main distribution level.\n          <\/div>\n\n          <div class=\"leeyee-t12-quick\">\n            <div class=\"leeyee-t12-quick-item\">\n              <b>Test duty<\/b>\n              <span>Class I + Class II<\/span>\n            <\/div>\n\n            <div class=\"leeyee-t12-quick-item\">\n              <b>Waveforms<\/b>\n              <span>10\/350 \u03bcs and 8\/20 \u03bcs<\/span>\n            <\/div>\n\n            <div class=\"leeyee-t12-quick-item\">\n              <b>Position<\/b>\n              <span>Origin or main distribution board<\/span>\n            <\/div>\n\n            <div class=\"leeyee-t12-quick-item\">\n              <b>Key ratings<\/b>\n              <span>Iimp, In, Imax, Uc and Up<\/span>\n            <\/div>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section\" id=\"what-is\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-eyebrow\">Definition<\/div>\n      <h2 class=\"leeyee-t12-title\">What Is a Type 1+2 SPD?<\/h2>\n\n      <div class=\"leeyee-t12-grid-2\">\n        <div>\n          <p>\n            A <strong>Type 1+2 SPD<\/strong> is a combined surge protective device\n            designed to meet both Type 1 and Type 2 test duties. It is used where\n            an installation may be exposed to partial lightning current and also\n            needs distribution-level surge-voltage limitation.\n          <\/p>\n\n          <p>\n            In IEC-style terminology, Type 1 duty is associated with Class I\n            testing and the 10\/350 \u03bcs impulse current waveform. Type 2 duty is\n            associated with Class II testing and the 8\/20 \u03bcs discharge current\n            waveform.\n          <\/p>\n\n          <p>\n            A Type 1+2 SPD does not mean \u201cbetter than every Type 2 SPD\u201d in every\n            project. It means the product has been designed and tested for two\n            different surge protection duties.\n          <\/p>\n\n          <div class=\"leeyee-t12-note\">\n            Need the full difference between SPD classes? Read the\n            <a href=\"https:\/\/www.cnspd.com\/spd-type1-vs-type2-vs-type-3\/\" target=\"_blank\" rel=\"noopener\">\n              Type 1 vs Type 2 vs Type 3 SPD guide\n            <\/a>.\n          <\/div>\n        <\/div>\n\n        <div class=\"leeyee-t12-product-visual\">\n          <a class=\"leeyee-t12-product-image\"\n             href=\"https:\/\/www.cnspd.com\/ly1-12-54spluggable-multi-pole-spd-product\/\"\n             target=\"_blank\"\n             rel=\"noopener\"\n             aria-label=\"View LEEYEE LY1-12 5-4S pluggable multi-pole SPD product page\">\n            <img decoding=\"async\"\n              src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/05\/ac-t12.webp\"\n              alt=\"LEEYEE AC Type 1+2 surge protective device\"\n              loading=\"lazy\"\n            \/>\n          <\/a>\n          <div class=\"leeyee-t12-product-caption\">\n            <span>AC Type 1+2 SPD<\/span>\n            <span>Class I + II<\/span>\n            <span>10\/350 \u03bcs + 8\/20 \u03bcs<\/span>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section leeyee-t12-soft\" id=\"how-it-works\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-eyebrow\">Working Principle<\/div>\n      <h2 class=\"leeyee-t12-title\">How a Type 1+2 SPD Works<\/h2>\n\n      <p class=\"leeyee-t12-intro\">\n        A Type 1+2 SPD is designed to respond to both high-energy impulse\n        current and lower-energy distribution surges.\n      <\/p>\n\n      <div class=\"leeyee-t12-grid-3\">\n        <div class=\"leeyee-t12-card\">\n          <div class=\"leeyee-t12-number\">1<\/div>\n          <h3>Surge enters the system<\/h3>\n          <p>\n            A lightning-related impulse or switching surge appears on the power\n            system and raises the voltage above the normal operating level.\n          <\/p>\n        <\/div>\n\n        <div class=\"leeyee-t12-card\">\n          <div class=\"leeyee-t12-number\">2<\/div>\n          <h3>SPD conducts surge current<\/h3>\n          <p>\n            The internal protection elements become conductive and divert surge\n            current toward the bonding or earthing system.\n          <\/p>\n        <\/div>\n\n        <div class=\"leeyee-t12-card\">\n          <div class=\"leeyee-t12-number\">3<\/div>\n          <h3>Voltage is limited<\/h3>\n          <p>\n            The SPD reduces the transient voltage reaching downstream equipment\n            according to its voltage protection level and installation conditions.\n          <\/p>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section\" id=\"combined-vs-separate\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-eyebrow\">Comparison<\/div>\n      <h2 class=\"leeyee-t12-title\">Type 1+2 SPD vs Separate Type 1 + Type 2 SPDs<\/h2>\n\n      <p class=\"leeyee-t12-intro\">\n        A combined Type 1+2 SPD and a separate Type 1 plus Type 2 arrangement can\n        both be valid. The better choice depends on installation space, project\n        design, coordination requirements and the manufacturer's tested solution.\n      <\/p>\n\n      <div class=\"leeyee-t12-table-wrap\">\n        <table class=\"leeyee-t12-table\">\n          <thead>\n            <tr>\n              <th>Comparison item<\/th>\n              <th>Type 1+2 SPD<\/th>\n              <th>Separate Type 1 + Type 2<\/th>\n            <\/tr>\n          <\/thead>\n          <tbody>\n            <tr>\n              <td>Basic concept<\/td>\n              <td>Two test duties in one combined device<\/td>\n              <td>Two separate SPD stages installed and coordinated<\/td>\n            <\/tr>\n            <tr>\n              <td>Panel space<\/td>\n              <td>Usually more compact<\/td>\n              <td>Usually requires more space<\/td>\n            <\/tr>\n            <tr>\n              <td>Coordination<\/td>\n              <td>Internal coordination depends on product design and testing<\/td>\n              <td>External coordination must be checked between devices<\/td>\n            <\/tr>\n            <tr>\n              <td>Installation simplicity<\/td>\n              <td>Often simpler at one main board location<\/td>\n              <td>May allow more flexible stage separation<\/td>\n            <\/tr>\n            <tr>\n              <td>Typical use<\/td>\n              <td>Main incoming board with both Type 1 and Type 2 duties<\/td>\n              <td>Larger installations with separate protection zones or panel distances<\/td>\n            <\/tr>\n            <tr>\n              <td>Selection risk<\/td>\n              <td>Must verify both Iimp and Type 2 ratings<\/td>\n              <td>Must verify distance, coordination and protection level between stages<\/td>\n            <\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n\n      <div class=\"leeyee-t12-warning\">\n        Do not choose a Type 1+2 SPD only because the name looks stronger.\n        Confirm the actual system voltage, test ratings, short-circuit conditions,\n        installation position and downstream equipment sensitivity.\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section\" id=\"when-needed\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-eyebrow\">Applications<\/div>\n      <h2 class=\"leeyee-t12-title\">When Do You Need a Type 1+2 SPD?<\/h2>\n\n      <p class=\"leeyee-t12-intro\">\n        Type 1+2 SPDs are commonly considered when Type 1 lightning-current duty\n        and Type 2 distribution protection are both needed at the same point.\n      <\/p>\n\n      <div class=\"leeyee-t12-checklist\">\n        <div class=\"leeyee-t12-check\">\n          <div>\n            <b>Building with external lightning protection<\/b>\n            <span>When partial lightning current may enter the low-voltage installation.<\/span>\n          <\/div>\n        <\/div>\n\n        <div class=\"leeyee-t12-check\">\n          <div>\n            <b>Main incoming distribution board<\/b>\n            <span>When the origin of the installation needs a compact combined SPD stage.<\/span>\n          <\/div>\n        <\/div>\n\n        <div class=\"leeyee-t12-check\">\n          <div>\n            <b>Industrial or commercial electrical panels<\/b>\n            <span>When reliability matters and the project design requires Class I + Class II surge protection.<\/span>\n          <\/div>\n        <\/div>\n\n        <div class=\"leeyee-t12-check\">\n          <div>\n            <b>Solar PV AC or DC protection concept<\/b>\n            <span>When the system design requires an SPD tested for both lightning-current and distribution surge duties.<\/span>\n          <\/div>\n        <\/div>\n\n        <div class=\"leeyee-t12-check\">\n          <div>\n            <b>Limited panel space<\/b>\n            <span>When a combined solution is preferred instead of two separate SPD stages.<\/span>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section leeyee-t12-soft\" id=\"when-type2-enough\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-eyebrow\">Avoid Overspecification<\/div>\n      <h2 class=\"leeyee-t12-title\">When Is a Type 2 SPD Enough?<\/h2>\n\n      <p>\n        Not every installation needs a Type 1+2 SPD. A Type 2 SPD may be enough\n        where Type 1 lightning-current duty is not required and the installation\n        mainly needs distribution-level surge protection.\n      <\/p>\n\n      <p>A Type 2 SPD may be considered when:<\/p>\n\n      <ul>\n        <li>The project does not require Type 1\/Class I duty;<\/li>\n        <li>No partial lightning current is expected at the installation origin;<\/li>\n        <li>The building does not have external lightning protection requiring Type 1 SPD selection;<\/li>\n        <li>The applicable standard, design or risk assessment only requires Type 2 protection;<\/li>\n        <li>The SPD is installed in a sub-distribution board or equipment panel.<\/li>\n      <\/ul>\n\n      <div class=\"leeyee-t12-note\">\n        For distribution-board selection, see the\n        <a href=\"https:\/\/www.cnspd.com\/type-2-spd\/\" target=\"_blank\" rel=\"noopener\">\n          Type 2 SPD guide\n        <\/a>.\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section\" id=\"selection-guide\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-eyebrow\">Selection Guide<\/div>\n      <h2 class=\"leeyee-t12-title\">How to Select a Type 1+2 SPD<\/h2>\n\n      <p class=\"leeyee-t12-intro\">\n        Select a Type 1+2 SPD by checking the full rating set, not only the kA\n        value printed on the product.\n      <\/p>\n\n      <div class=\"leeyee-t12-table-wrap\">\n        <table class=\"leeyee-t12-table\">\n          <thead>\n            <tr>\n              <th>Selection item<\/th>\n              <th>Initial direction<\/th>\n            <\/tr>\n          <\/thead>\n          <tbody>\n            <tr>\n              <td>System type<\/td>\n              <td>Confirm AC, PV DC, telecom, signal or special application.<\/td>\n            <\/tr>\n            <tr>\n              <td>Nominal voltage<\/td>\n              <td>Choose Uc or Ucpv according to the real operating voltage and system arrangement.<\/td>\n            <\/tr>\n            <tr>\n              <td>Installation position<\/td>\n              <td>Confirm whether it is installed at the origin, main board or another protection zone transition.<\/td>\n            <\/tr>\n            <tr>\n              <td>Earthing system<\/td>\n              <td>Confirm TN-S, TN-C, TT, IT or the relevant PV DC grounding arrangement.<\/td>\n            <\/tr>\n            <tr>\n              <td>Iimp<\/td>\n              <td>Check impulse current rating for Type 1\/Class I duty.<\/td>\n            <\/tr>\n            <tr>\n              <td>In and Imax<\/td>\n              <td>Check discharge current ratings for Type 2\/Class II duty.<\/td>\n            <\/tr>\n            <tr>\n              <td>Up<\/td>\n              <td>Check whether the voltage protection level is suitable for downstream equipment.<\/td>\n            <\/tr>\n            <tr>\n              <td>Short-circuit rating<\/td>\n              <td>Verify prospective short-circuit current and required backup protection.<\/td>\n            <\/tr>\n            <tr>\n              <td>Poles and protection mode<\/td>\n              <td>Confirm 1P, 2P, 3P, 4P, N-PE or PV pole configuration.<\/td>\n            <\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n\n      <div class=\"leeyee-t12-rating-grid\">\n        <div class=\"leeyee-t12-rating\">\n          <strong>Iimp<\/strong>\n          <span>Impulse discharge current for Type 1 lightning-current duty.<\/span>\n        <\/div>\n\n        <div class=\"leeyee-t12-rating\">\n          <strong>In \/ Imax<\/strong>\n          <span>Discharge current values associated with Type 2 duty.<\/span>\n        <\/div>\n\n        <div class=\"leeyee-t12-rating\">\n          <strong>Uc \/ Ucpv<\/strong>\n          <span>Maximum continuous operating voltage for AC or PV DC systems.<\/span>\n        <\/div>\n\n        <div class=\"leeyee-t12-rating\">\n          <strong>Up<\/strong>\n          <span>Voltage protection level under defined test conditions.<\/span>\n        <\/div>\n\n        <div class=\"leeyee-t12-rating\">\n          <strong>ISCCR<\/strong>\n          <span>Short-circuit current rating or relevant fault-current withstand condition.<\/span>\n        <\/div>\n\n        <div class=\"leeyee-t12-rating\">\n          <strong>Mode<\/strong>\n          <span>L-N, L-PE, N-PE, L-L or PV-specific protection configuration.<\/span>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section\" id=\"installation\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-eyebrow\">Installation Notes<\/div>\n      <h2 class=\"leeyee-t12-title\">Installation and Coordination Notes<\/h2>\n\n      <div class=\"leeyee-t12-grid-3\">\n        <div class=\"leeyee-t12-card\">\n          <h3>Keep leads short<\/h3>\n          <p>\n            Long connection conductors increase residual voltage. Keep SPD\n            connection paths as short and straight as practical.\n          <\/p>\n        <\/div>\n\n        <div class=\"leeyee-t12-card\">\n          <h3>Check backup protection<\/h3>\n          <p>\n            Verify required fuse or breaker coordination according to the SPD\n            datasheet and project short-circuit conditions.\n          <\/p>\n        <\/div>\n\n        <div class=\"leeyee-t12-card\">\n          <h3>Coordinate downstream<\/h3>\n          <p>\n            A Type 1+2 SPD at the main board may not eliminate the need for\n            downstream Type 2 or Type 3 protection near sensitive equipment.\n          <\/p>\n        <\/div>\n      <\/div>\n\n      <div class=\"leeyee-t12-warning\">\n        Type 1+2 does not automatically mean the whole installation is fully\n        protected. Cable length, equipment sensitivity, downstream panels and\n        protection zones still matter.\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section leeyee-t12-soft\" id=\"ac-vs-pv\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-eyebrow\">AC and PV DC<\/div>\n      <h2 class=\"leeyee-t12-title\">AC Type 1+2 SPD vs PV DC Type 1+2 SPD<\/h2>\n\n      <p class=\"leeyee-t12-intro\">\n        AC and PV DC SPDs are not interchangeable. A Type 1+2 classification\n        must still be matched with the correct application and voltage system.\n      <\/p>\n\n      <div class=\"leeyee-t12-table-wrap\">\n        <table class=\"leeyee-t12-table\">\n          <thead>\n            <tr>\n              <th>Comparison item<\/th>\n              <th>AC Type 1+2 SPD<\/th>\n              <th>PV DC Type 1+2 SPD<\/th>\n            <\/tr>\n          <\/thead>\n          <tbody>\n            <tr>\n              <td>Application<\/td>\n              <td>Low-voltage AC distribution system<\/td>\n              <td>Photovoltaic DC circuits and inverter DC side<\/td>\n            <\/tr>\n            <tr>\n              <td>Voltage rating<\/td>\n              <td>Uc selected for AC system voltage<\/td>\n              <td>Ucpv selected for PV string or array voltage<\/td>\n            <\/tr>\n            <tr>\n              <td>Arc behaviour<\/td>\n              <td>AC current naturally crosses zero<\/td>\n              <td>DC current requires PV-specific disconnection design<\/td>\n            <\/tr>\n            <tr>\n              <td>Common use<\/td>\n              <td>Main incoming boards and AC distribution panels<\/td>\n              <td>PV combiner boxes, inverter DC input and PV protection panels<\/td>\n            <\/tr>\n            <tr>\n              <td>Selection warning<\/td>\n              <td>Match earthing system and protection mode<\/td>\n              <td>Do not use ordinary AC SPD on PV DC circuits<\/td>\n            <\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n\n      <div class=\"leeyee-t12-note\">\n        For photovoltaic applications, see\n        <a href=\"https:\/\/www.cnspd.com\/solar-spd\/\" target=\"_blank\" rel=\"noopener\">Solar SPD<\/a>\n        and\n        <a href=\"https:\/\/www.cnspd.com\/dc-spd-up-to-1500v\/\" target=\"_blank\" rel=\"noopener\">1500V DC SPD<\/a>.\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section\" id=\"mistakes\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-eyebrow\">Selection Mistakes<\/div>\n      <h2 class=\"leeyee-t12-title\">Common Type 1+2 SPD Selection Mistakes<\/h2>\n\n      <div class=\"leeyee-t12-grid-3\">\n        <div class=\"leeyee-t12-card\">\n          <h3>Choosing by kA only<\/h3>\n          <p>\n            A high current number is not enough. Check waveform, rating type,\n            Uc, Up, protection mode and short-circuit conditions.\n          <\/p>\n        <\/div>\n\n        <div class=\"leeyee-t12-card\">\n          <h3>Ignoring Iimp<\/h3>\n          <p>\n            If Type 1 duty is required, the Iimp rating and 10\/350 \u03bcs test duty\n            must be checked, not only Imax.\n          <\/p>\n        <\/div>\n\n        <div class=\"leeyee-t12-card\">\n          <h3>Using AC SPD on PV DC<\/h3>\n          <p>\n            PV DC circuits require PV-specific voltage and disconnection\n            characteristics. AC products should not be substituted.\n          <\/p>\n        <\/div>\n\n        <div class=\"leeyee-t12-card\">\n          <h3>Forgetting downstream panels<\/h3>\n          <p>\n            A main-board Type 1+2 SPD may still need downstream coordinated\n            SPDs when loads are far away.\n          <\/p>\n        <\/div>\n\n        <div class=\"leeyee-t12-card\">\n          <h3>Wrong earthing assumption<\/h3>\n          <p>\n            Protection mode and pole configuration must match the actual TN, TT,\n            IT or PV grounding arrangement.\n          <\/p>\n        <\/div>\n\n        <div class=\"leeyee-t12-card\">\n          <h3>No backup protection check<\/h3>\n          <p>\n            The SPD and upstream protective device must be compatible with the\n            prospective short-circuit current.\n          <\/p>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section leeyee-t12-soft\" id=\"leeyee-support\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-eyebrow\">LEEYEE Support<\/div>\n      <h2 class=\"leeyee-t12-title\">Type 1+2 SPD Support from LEEYEE<\/h2>\n\n      <p class=\"leeyee-t12-intro\">\n        LEEYEE is a specialized surge protection and low-voltage protection\n        supplier, trusted for solar PV, power distribution, telecom, industrial,\n        and OEM applications.\n      <\/p>\n\n      <div class=\"leeyee-t12-grid-3\">\n        <div class=\"leeyee-t12-card\">\n          <h3>Model selection<\/h3>\n          <p>\n            Support for selecting AC or PV DC Type 1+2 SPD by system voltage,\n            pole configuration, protection mode and project environment.\n          <\/p>\n        <\/div>\n\n        <div class=\"leeyee-t12-card\">\n          <h3>OEM and project supply<\/h3>\n          <p>\n            Support for OEM labels, project documentation, packaging and bulk\n            supply for distributors, contractors and equipment builders.\n          <\/p>\n        <\/div>\n\n        <div class=\"leeyee-t12-card\">\n          <h3>Application documents<\/h3>\n          <p>\n            Support with datasheets, product images, installation references and\n            basic selection communication for B2B buyers.\n          <\/p>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section\" id=\"related\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-eyebrow\">Related Guides<\/div>\n      <h2 class=\"leeyee-t12-title\">Continue Your SPD Selection<\/h2>\n\n      <div class=\"leeyee-t12-related\">\n        <a href=\"https:\/\/www.cnspd.com\/spd-type1-vs-type2-vs-type-3\/\" target=\"_blank\" rel=\"noopener\">\n          Type 1 vs Type 2 vs Type 3 SPD\n          <span>Compare SPD classes by position, waveform and protection role.<\/span>\n        <\/a>\n\n        <a href=\"https:\/\/www.cnspd.com\/type-2-spd\/\" target=\"_blank\" rel=\"noopener\">\n          Type 2 SPD\n          <span>Learn distribution-level SPD selection and applications.<\/span>\n        <\/a>\n\n        <a href=\"https:\/\/www.cnspd.com\/shop\/surge-protective-device\/\" target=\"_blank\" rel=\"noopener\">\n          Surge Protective Devices\n          <span>Browse AC, DC, solar PV and signal surge protection products.<\/span>\n        <\/a>\n\n        <a href=\"https:\/\/www.cnspd.com\/solar-spd\/\" target=\"_blank\" rel=\"noopener\">\n          Solar SPD\n          <span>Understand surge protection for photovoltaic systems.<\/span>\n        <\/a>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section\" id=\"faq\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-eyebrow\">FAQ<\/div>\n      <h2 class=\"leeyee-t12-title\">Type 1+2 SPD FAQ<\/h2>\n\n      <div class=\"leeyee-t12-faq\">\n        <details>\n          <summary>What does Type 1+2 SPD mean?<\/summary>\n          <div class=\"leeyee-t12-faq-body\">\n            <p>Type 1+2 SPD means a surge protective device tested for both Type 1\/Class I and Type 2\/Class II duties. It can handle lightning-current impulse duty and distribution-level surge protection in one device.<\/p>\n          <\/div>\n        <\/details>\n\n        <details>\n          <summary>Is Type 1+2 SPD the same as Type 1 SPD?<\/summary>\n          <div class=\"leeyee-t12-faq-body\">\n            <p>No. A Type 1 SPD is tested for Type 1 duty, while a Type 1+2 SPD is tested for both Type 1 and Type 2 duties. The actual product ratings must still be checked.<\/p>\n          <\/div>\n        <\/details>\n\n        <details>\n          <summary>Is Type 1+2 SPD better than Type 2 SPD?<\/summary>\n          <div class=\"leeyee-t12-faq-body\">\n            <p>Not always. Type 1+2 is suitable when Type 1 duty is required. If the installation only needs distribution-level surge protection, a correctly selected Type 2 SPD may be enough.<\/p>\n          <\/div>\n        <\/details>\n\n        <details>\n          <summary>Where is a Type 1+2 SPD installed?<\/summary>\n          <div class=\"leeyee-t12-faq-body\">\n            <p>It is commonly installed at the origin of the installation or in the main distribution board, depending on the system design and protection concept.<\/p>\n          <\/div>\n        <\/details>\n\n        <details>\n          <summary>Does a Type 1+2 SPD remove the need for downstream SPDs?<\/summary>\n          <div class=\"leeyee-t12-faq-body\">\n            <p>Not always. Long cable runs, downstream distribution boards and sensitive equipment may still require coordinated Type 2 or Type 3 protection.<\/p>\n          <\/div>\n        <\/details>\n\n        <details>\n          <summary>Can an AC Type 1+2 SPD be used on PV DC circuits?<\/summary>\n          <div class=\"leeyee-t12-faq-body\">\n            <p>No. PV DC circuits require PV-specific SPDs with suitable DC voltage and disconnection characteristics.<\/p>\n          <\/div>\n        <\/details>\n\n        <details>\n          <summary>What information is needed to select a Type 1+2 SPD?<\/summary>\n          <div class=\"leeyee-t12-faq-body\">\n            <p>Provide AC or DC application, nominal voltage, earthing system, installation position, poles, required Iimp, In or Imax, Up, short-circuit conditions and project quantity.<\/p>\n          <\/div>\n        <\/details>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <section class=\"leeyee-t12-section\" id=\"request-selection\">\n    <div class=\"leeyee-t12-container\">\n      <div class=\"leeyee-t12-cta-band\">\n        <h2>Need Help Selecting a Type 1+2 SPD?<\/h2>\n\n        <p>\n          Send your AC or PV DC application, system voltage, earthing arrangement,\n          installation position, poles, required ratings and project quantity.\n          LEEYEE will help identify a suitable Type 1+2 surge protection option.\n        <\/p>\n\n        <button type=\"button\" class=\"leeyee-t12-btn leeyee-t12-btn-white leeyee-site-popup-btn\" aria-label=\"Request Type 1+2 SPD Selection\">\n          <span class=\"w-btn-label\">Request Type 1+2 SPD Selection<\/span>\n        <\/button>\n      <\/div>\n    <\/div>\n  <\/section>\n\n<\/div>\n\n<script>\n  document.addEventListener('DOMContentLoaded', function () {\n    var type12PopupButtons = document.querySelectorAll('.leeyee-site-popup-btn');\n\n    type12PopupButtons.forEach(function (button) {\n      button.addEventListener('click', function () {\n        var realPopupTrigger = document.querySelector('.w-popup.ush_popup_1 .w-popup-trigger');\n\n        if (realPopupTrigger) {\n          realPopupTrigger.click();\n        } else {\n          window.open('https:\/\/www.cnspd.com\/contact\/', '_blank', 'noopener');\n        }\n      });\n    });\n  });\n<\/script>\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 1+2 SPD mean?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Type 1+2 SPD means a surge protective device tested for both Type 1\/Class I and Type 2\/Class II duties. It can handle lightning-current impulse duty and distribution-level surge protection in one device.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is Type 1+2 SPD the same as Type 1 SPD?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. A Type 1 SPD is tested for Type 1 duty, while a Type 1+2 SPD is tested for both Type 1 and Type 2 duties. The actual product ratings must still be checked.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is Type 1+2 SPD better than Type 2 SPD?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Not always. Type 1+2 is suitable when Type 1 duty is required. 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Long cable runs, downstream distribution boards and sensitive equipment may still require coordinated Type 2 or Type 3 protection.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can an AC Type 1+2 SPD be used on PV DC circuits?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. PV DC circuits require PV-specific SPDs with suitable DC voltage and disconnection characteristics.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What information is needed to select a Type 1+2 SPD?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Provide AC or DC application, nominal voltage, earthing system, installation position, poles, required Iimp, In or Imax, Up, short-circuit conditions and project quantity.\"\n      }\n    }\n  ]\n}\n<\/script><\/div><\/div><\/div><\/div><\/div><\/section>\n","protected":false},"excerpt":{"rendered":"Type 1+2 SPD Selection Guide Type 1+2 SPD: What It Means and When to Use It A Type 1+2 SPD combines Class I lightning-current duty and Class II distribution-level surge protection in one device. It is commonly used at the origin of an installation where both Type 1 and Type 2 protection duties are required....","protected":false},"author":18,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-29517","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Type 1+2 SPD: When to Use It &amp; How to Select the Right One<\/title>\n<meta name=\"description\" content=\"Need a Type 1+2 SPD? Learn when combined Class I+II surge protection is required, when Type 2 is enough, and how to check Iimp, In, Uc and Up.\" \/>\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\/type-1-2-spd\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Type 1+2 SPD: When to Use It &amp; How to Select the Right One\" \/>\n<meta property=\"og:description\" content=\"Need a Type 1+2 SPD? 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