{"id":30375,"date":"2026-07-23T13:19:52","date_gmt":"2026-07-23T05:19:52","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=30375"},"modified":"2026-07-23T16:08:31","modified_gmt":"2026-07-23T08:08:31","slug":"spark-gap-spd-vs-mov-spd-type-1-type-12-and-n-pe-selection-guide","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/es\/spark-gap-spd-vs-mov-spd\/","title":{"rendered":"Gu\u00eda de selecci\u00f3n de SPD de chispa frente a SPD MOV: Tipo 1, Tipo 1+2 y N-PE"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"30375\" class=\"elementor elementor-30375\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-61653df e-flex e-con-boxed e-con e-parent\" data-id=\"61653df\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-422bd82 elementor-widget elementor-widget-html\" data-id=\"422bd82\" 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<!--\r\nPAGE METADATA\r\nH1 (set in WordPress page title, not inside this Custom HTML): Spark Gap SPD vs MOV SPD: Type 1, Type 1+2 and N-PE Selection Guide\r\nSEO TITLE: Spark Gap SPD vs MOV SPD | Type 1 & N-PE Guide\r\nMETA DESCRIPTION: Compare spark gap and MOV Type 1 SPDs by Iimp, Up, follow current, N-PE 3+1 design, certification and OEM selection requirements.\r\nRECOMMENDED URL: https:\/\/www.cnspd.com\/spark-gap-spd-vs-mov-spd\/\r\nREVISION: Article-first layout with in-column tables and compact article CTA updated July 23, 2026.\r\n-->\r\n<article class=\"lysg-page\" id=\"lysg-page\">\r\n<style>\r\n#lysg-page {\r\n  --lysg-blue: #004898;\r\n  --lysg-blue-dark: #00366f;\r\n  --lysg-blue-soft: #f1f6fc;\r\n  --lysg-text: #27384b;\r\n  --lysg-heading: #142b43;\r\n  --lysg-muted: #647488;\r\n  --lysg-line: #dce5ee;\r\n  --lysg-soft: #f7f9fc;\r\n  --lysg-warning: #fff7ed;\r\n  --lysg-success: #eff9f4;\r\n  --lysg-white: #ffffff;\r\n  --lysg-content: 900px;\r\n  color: var(--lysg-text);\r\n  background: var(--lysg-white);\r\n  font-family: Arial, Helvetica, sans-serif;\r\n  font-size: 16px;\r\n  line-height: 1.72;\r\n  overflow-wrap: anywhere;\r\n}\r\n#lysg-page, #lysg-page * { box-sizing: border-box; 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}\r\n}\r\n@media (max-width: 540px) {\r\n  #lysg-page .lysg-section { padding: 34px 0; }\r\n  #lysg-page h2 { font-size: 24px; }\r\n  #lysg-page .lysg-card, #lysg-page .lysg-definition, #lysg-page .lysg-doc-card, #lysg-page .lysg-flow-step, #lysg-page .lysg-test-item, #lysg-page .lysg-mistake, #lysg-page .lysg-related-card, #lysg-page .lysg-decision-card { padding: 16px; }\r\n}\r\n@media (max-width: 480px) {\r\n  #lysg-page .lysg-intro-copy { font-size: 16px; }\r\n  #lysg-page .lysg-quick-answer h2, #lysg-page .lysg-toc h2 { font-size: 21px; }\r\n  #lysg-page .lysg-table td { grid-template-columns: 1fr; gap: 4px; }\r\n  #lysg-page .lysg-btn { width: 100%; }\r\n}\r\n@media (max-width: 430px) {\r\n  #lysg-page .lysg-container, #lysg-page .lysg-footer-mark { width: calc(100% - 24px); }\r\n  #lysg-page .lysg-quick-answer, #lysg-page .lysg-toc, #lysg-page .lysg-cta { padding: 16px; }\r\n}\r\n@media (max-width: 414px) { #lysg-page h2 { font-size: 23px; } }\r\n@media (max-width: 390px) { #lysg-page { font-size: 15px; } }\r\n@media (max-width: 375px) { #lysg-page .lysg-section { padding: 31px 0; } }\r\n@media (max-width: 360px) { #lysg-page .lysg-quick-answer, #lysg-page .lysg-toc, #lysg-page .lysg-cta { padding: 15px; } }\r\n@media (max-width: 320px) {\r\n  #lysg-page .lysg-container, #lysg-page .lysg-footer-mark { width: calc(100% - 20px); }\r\n  #lysg-page h2 { font-size: 22px; }\r\n  #lysg-page .lysg-mistake { padding-left: 44px; }\r\n}\r\n@media (prefers-reduced-motion: reduce) {\r\n  #lysg-page *, #lysg-page *::before, #lysg-page *::after { scroll-behavior: auto !important; transition: none !important; }\r\n}\r\n<\/style>\r\n\r\n\r\n\r\n<header class=\"lysg-article-intro\" id=\"top\">\r\n<div class=\"lysg-container\">\r\n<p class=\"lysg-intro-copy\"><strong>Spark gap SPD vs MOV SPD<\/strong> is not a simple \u201cbetter or worse\u201d comparison. A spark gap uses voltage-switching behaviour. An MOV uses voltage-limiting behaviour. This guide explains how those structures affect Type 1, Type 1+2, N-PE and 3+1 selection for engineering procurement and OEM approval.<\/p>\r\n<div aria-label=\"Article update information\" class=\"lysg-article-meta\">\r\n<span><strong>Last updated:<\/strong> July 23, 2026<\/span>\r\n<span><strong>Technical review:<\/strong> LEEYEE Technical Team<\/span>\r\n<span><strong>Scope:<\/strong> AC low-voltage Type 1, Type 1+2 and N-PE protection<\/span>\r\n<\/div>\r\n<section aria-labelledby=\"lysg-quick-title\" class=\"lysg-quick-answer\">\r\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spark-gap-spd-vs-mov-spd\/#quick-answer\" >Quick Answer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spark-gap-spd-vs-mov-spd\/#contents\" >Contents<\/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\/es\/spark-gap-spd-vs-mov-spd\/#spark-gap-spd-vs-mov-spd\" >Spark Gap SPD vs MOV 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\/es\/spark-gap-spd-vs-mov-spd\/#what-is-a-spark-gap-based-spd\" >What is a spark-gap-based SPD?<\/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\/es\/spark-gap-spd-vs-mov-spd\/#what-is-an-mov-based-spd\" >What is an MOV-based SPD?<\/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\/es\/spark-gap-spd-vs-mov-spd\/#does-a-type-1-spd-have-to-use-a-spark-gap\" >Does a Type 1 SPD have to use a spark gap?<\/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\/es\/spark-gap-spd-vs-mov-spd\/#why-spark-gaps-are-frequently-selected-for-type-1-duty\" >Why spark gaps are frequently selected for Type 1 duty<\/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\/es\/spark-gap-spd-vs-mov-spd\/#why-spark-gaps-are-widely-used-for-n-pe-protection-in-31-systems\" >Why spark gaps are widely used for N-PE protection in 3+1 systems<\/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\/es\/spark-gap-spd-vs-mov-spd\/#follow-current-is-one-of-the-most-important-spark-gap-procurement-checks\" >Follow current is one of the most important spark-gap procurement checks<\/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\/es\/spark-gap-spd-vs-mov-spd\/#why-%e2%80%9cresponse-time%e2%80%9d-alone-cannot-select-a-type-1-spd\" >Why \u201cresponse time\u201d alone cannot select a Type 1 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\/es\/spark-gap-spd-vs-mov-spd\/#leakage-current-tov-and-ageing-require-different-checks\" >Leakage current, TOV and ageing require different checks<\/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\/es\/spark-gap-spd-vs-mov-spd\/#which-structure-should-a-b2b-buyer-evaluate\" >Which structure should a B2B buyer evaluate?<\/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\/es\/spark-gap-spd-vs-mov-spd\/#type-1-spd-verification-workflow\" >Type 1 SPD verification workflow<\/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\/es\/spark-gap-spd-vs-mov-spd\/#how-leeyee-turns-this-guide-into-a-verifiable-b2b-decision\" >How LEEYEE turns this guide into a verifiable B2B decision<\/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\/es\/spark-gap-spd-vs-mov-spd\/#common-buying-mistakes\" >Common buying mistakes<\/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\/es\/spark-gap-spd-vs-mov-spd\/#need-help-confirming-a-type-1-spd-specification\" >Need help confirming a Type 1 SPD specification?<\/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\/es\/spark-gap-spd-vs-mov-spd\/#continue-the-type-1-and-spd-selection-process\" >Continue the Type 1 and SPD selection process<\/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\/es\/spark-gap-spd-vs-mov-spd\/#spark-gap-spd-vs-mov-spd-faq\" >Spark gap SPD vs MOV 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\/es\/spark-gap-spd-vs-mov-spd\/#references\" >References<\/a><\/li><\/ul><\/nav><\/div>\n<h2 id=\"lysg-quick-title\"><span class=\"ez-toc-section\" id=\"quick-answer\"><\/span>Quick Answer<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>A <strong>spark-gap-based SPD<\/strong> remains electrically isolated during normal operation and switches into a low-impedance discharge path when its sparkover condition is reached.<\/p>\r\n<p>An <strong>MOV-based SPD<\/strong> progressively lowers its resistance as voltage rises, diverting surge current while limiting the voltage across the protected circuit.<\/p>\r\n<p>Spark gaps are widely used for Type 1 lightning-current and N-PE duties. MOVs dominate Type 2 protection and are also used in tested Type 1+2 designs. <strong>Type 1 is a complete-device test classification, not a component name.<\/strong><\/p>\r\n<p class=\"lysg-quick-rule\"><strong>Procurement rule:<\/strong> compare Iimp, Uc, Up, protection modes, follow-current behaviour, Isccr, backup protection and the exact certified model.<\/p>\r\n<\/section>\r\n<nav aria-labelledby=\"lysg-toc-title\" class=\"lysg-toc\">\r\n<h2 id=\"lysg-toc-title\"><span class=\"ez-toc-section\" id=\"contents\"><\/span>Contents<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<div class=\"lysg-toc-grid\">\r\n<a href=\"#comparison\">1. Spark gap vs MOV comparison<\/a>\r\n<a href=\"#working-principles\">2. How both structures work<\/a>\r\n<a href=\"#type-1\">3. Type 1 selection<\/a>\r\n<a href=\"#n-pe\">4. N-PE and 3+1 protection<\/a>\r\n<a href=\"#follow-current\">5. Follow current<\/a>\r\n<a href=\"#response-time\">6. Response time, leakage and ageing<\/a>\r\n<a href=\"#structure-selection\">7. Which structure to evaluate<\/a>\r\n<a href=\"#procurement\">8. Procurement verification<\/a>\r\n<a href=\"#leeyee-verification\">9. LEEYEE verification evidence<\/a>\r\n<a href=\"#faq\">10. FAQ and references<\/a>\r\n<\/div>\r\n<\/nav>\r\n<div class=\"lysg-standards-note\">\r\n<b>Current IEC framework<\/b>\r\n<p>IEC 61643-11:2025 covers SPDs connected to AC low-voltage power systems and is used with IEC 61643-01:2024. Existing certificates may still reference the 2011 edition, so buyers should confirm the applicable edition, national adoption and exact certificate scope.<sup><a href=\"#ref-1\">[1]<\/a><\/sup><sup><a href=\"#ref-2\">[2]<\/a><\/sup><\/p>\r\n<\/div>\r\n<\/div>\r\n<\/header><main>\r\n\r\n<section class=\"lysg-section lysg-section--soft\" id=\"comparison\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-section-head\">\r\n<div class=\"lysg-eyebrow\">At-a-glance comparison<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"spark-gap-spd-vs-mov-spd\"><\/span>Spark Gap SPD vs MOV SPD<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>The table describes common engineering behaviour. Actual performance depends on the complete SPD construction, ratings and test results.<\/p>\r\n<\/div>\r\n<div aria-label=\"Spark gap and MOV SPD comparison\" class=\"lysg-table-shell\" role=\"region\" tabindex=\"0\">\r\n<table class=\"lysg-table\">\r\n<thead>\r\n<tr>\r\n<th>Comparison point<\/th>\r\n<th>Spark-gap-based SPD<\/th>\r\n<th>MOV-based SPD<\/th>\r\n<th>Procurement implication<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td data-label=\"Comparison point\">Basic behaviour<\/td>\r\n<td data-label=\"Spark gap\">Voltage switching<\/td>\r\n<td data-label=\"MOV\">Voltage limiting<\/td>\r\n<td data-label=\"Buyer check\">Review the complete voltage-time behaviour and declared Up.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Comparison point\">Normal state<\/td>\r\n<td data-label=\"Spark gap\">Very high impedance with an open gap<\/td>\r\n<td data-label=\"MOV\">High impedance; leakage depends on the design and operating voltage<\/td>\r\n<td data-label=\"Buyer check\">Check leakage-current and insulation requirements where they matter.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Comparison point\">Typical use<\/td>\r\n<td data-label=\"Spark gap\">Type 1, high lightning-current duty, N-PE modules<\/td>\r\n<td data-label=\"MOV\">Type 2 and many compact Type 1+2 designs<\/td>\r\n<td data-label=\"Buyer check\">Do not infer the test class from the component alone.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Comparison point\">Key Type 1 rating<\/td>\r\n<td data-label=\"Spark gap\">Iimp, Up, sparkover behaviour and follow-current performance<\/td>\r\n<td data-label=\"MOV\">Iimp, Uc, Up, TOV and thermal-disconnection performance<\/td>\r\n<td data-label=\"Buyer check\">Match ratings to the installation and certificate.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Comparison point\">Follow current<\/td>\r\n<td data-label=\"Spark gap\">May occur in some designs; modern products may limit, extinguish or avoid it<\/td>\r\n<td data-label=\"MOV\">No arc-based line follow current<\/td>\r\n<td data-label=\"Buyer check\">For spark gaps, verify Ifi or the manufacturer\u2019s no-follow-current claim.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Comparison point\">Thermal concern<\/td>\r\n<td data-label=\"Spark gap\">Arc chamber, electrode condition and interruption behaviour<\/td>\r\n<td data-label=\"MOV\">TOV, cumulative stress, overheating and disconnection<\/td>\r\n<td data-label=\"Buyer check\">Review safety tests and internal disconnector design.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Comparison point\">Maintenance format<\/td>\r\n<td data-label=\"Spark gap\">Available as fixed or pluggable construction<\/td>\r\n<td data-label=\"MOV\">Commonly pluggable with visual and remote status options<\/td>\r\n<td data-label=\"Buyer check\">Confirm replacement-module compatibility and indication.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Comparison point\">N-PE application<\/td>\r\n<td data-label=\"Spark gap\">Widely used for N-PE total-current paths in 1+1 and 3+1 systems<\/td>\r\n<td data-label=\"MOV\">May be used in other certified architectures<\/td>\r\n<td data-label=\"Buyer check\">Verify the actual N-PE technology and Iimp\/Itotal.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Comparison point\">Approval rule<\/td>\r\n<td data-label=\"Spark gap\">Do not approve merely because it is a spark gap<\/td>\r\n<td data-label=\"MOV\">Do not reject merely because it is MOV-based<\/td>\r\n<td data-label=\"Buyer check\">Approve the complete SPD model and documented system fit.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<figure class=\"lysg-figure\">\r\n<img fetchpriority=\"high\" alt=\"Spark gap SPD and MOV SPD structure comparison for Type 1 surge protection\" decoding=\"async\" fetchpriority=\"high\" height=\"1086\" loading=\"eager\" src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/spark-gap-vs-mov-type-1-spd-structure-comparison.webp\" width=\"1448\"\/>\r\n<figcaption>Conceptual comparison of voltage-switching spark-gap operation, voltage-limiting MOV operation and hybrid Type 1+2 architecture. Final performance must be verified on the complete SPD.<\/figcaption>\r\n<\/figure>\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section\" id=\"working-principles\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-tech-grid\">\r\n<article class=\"lysg-card lysg-card--spark\">\r\n<div class=\"lysg-card-kicker\">Voltage switching<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"what-is-a-spark-gap-based-spd\"><\/span>What is a spark-gap-based SPD?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>A spark gap uses electrodes separated by a controlled insulating space. Under normal voltage, the path remains open.<\/p>\r\n<p>When the dynamic sparkover condition is reached, the gap ionises and forms an arc path that diverts surge current. After the surge, the SPD must return to its non-conducting state.<\/p>\r\n<p>Power-frequency spark gaps may use air, gas, carbon, graphite, encapsulated, triggered or multi-gap constructions. These designs should not be treated as technically identical.<\/p>\r\n<ul>\r\n<li>High lightning-current capability can be achieved.<\/li>\r\n<li>Normal-operation electrical isolation is possible.<\/li>\r\n<li>Follow-current behaviour is a key system-availability issue.<\/li>\r\n<li>Dynamic sparkover and residual-voltage behaviour must be verified.<\/li>\r\n<\/ul>\r\n<\/article>\r\n<article class=\"lysg-card lysg-card--mov\">\r\n<div class=\"lysg-card-kicker\">Voltage limiting<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"what-is-an-mov-based-spd\"><\/span>What is an MOV-based SPD?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>An MOV is a metal oxide varistor with a strongly nonlinear voltage-current characteristic.<\/p>\r\n<p>As voltage rises, its resistance falls. The MOV then diverts surge current and limits the voltage across the protected circuit.<\/p>\r\n<p>MOVs support compact DIN-rail products, pluggable cartridges, status indication and remote contacts. The complete SPD must still manage TOV, heat and short-circuit failure conditions.<\/p>\r\n<ul>\r\n<li>Low voltage-limiting performance can be achieved.<\/li>\r\n<li>Compact and pluggable designs are common.<\/li>\r\n<li>Uc selection and TOV behaviour are critical.<\/li>\r\n<li>Thermal disconnection is part of the safety design.<sup><a href=\"#ref-7\">[7]<\/a><\/sup><\/li>\r\n<\/ul>\r\n<\/article>\r\n<\/div>\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section lysg-section--soft\" id=\"type-1\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-definition\">\r\n<div class=\"lysg-definition-grid\">\r\n<div>\r\n<div class=\"lysg-eyebrow\">Critical classification rule<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"does-a-type-1-spd-have-to-use-a-spark-gap\"><\/span>Does a Type 1 SPD have to use a spark gap?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p><strong>No.<\/strong> Spark gaps are common in Type 1 lightning-current arresters, but Type 1 is a test classification for the complete SPD or declared protection mode.<\/p>\r\n<p>A Type 1 device is associated with lightning impulse-current duty using the 10\/350 \u03bcs waveform and the declared Iimp. A spark gap does not prove Type 1 compliance by itself. A tested MOV-based device is not automatically excluded from Type 1 or Type 1+2 classification.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><sup><a href=\"#ref-4\">[4]<\/a><\/sup><\/p>\r\n<\/div>\r\n<div class=\"lysg-metric-grid\">\r\n<div class=\"lysg-metric\"><b>Iimp<\/b><span>Lightning impulse current used for Type 1 duty.<\/span><\/div>\r\n<div class=\"lysg-metric\"><b>Uc<\/b><span>Maximum continuous operating voltage.<\/span><\/div>\r\n<div class=\"lysg-metric\"><b>Up<\/b><span>Declared voltage protection level.<\/span><\/div>\r\n<div class=\"lysg-metric\"><b>Ifi<\/b><span>Follow-current interruption capability where applicable.<\/span><\/div>\r\n<div class=\"lysg-metric\"><b>Isccr<\/b><span>Short-circuit current rating of the SPD arrangement.<\/span><\/div>\r\n<div class=\"lysg-metric\"><b>Mode<\/b><span>L-N, L-PE, N-PE or combined protection path.<\/span><\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<div class=\"lysg-section-head\">\r\n<h2><span class=\"ez-toc-section\" id=\"why-spark-gaps-are-frequently-selected-for-type-1-duty\"><\/span>Why spark gaps are frequently selected for Type 1 duty<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>The benefit comes from the engineered complete product, not the word \u201cspark gap\u201d on a catalogue page.<\/p>\r\n<\/div>\r\n<div class=\"lysg-three-col\">\r\n<article class=\"lysg-card\">\r\n<h3>Lightning-current discharge<\/h3>\r\n<p>Type 1 SPDs may be installed where partial lightning current must be handled. Spark-gap constructions are widely engineered for this high-energy duty.<\/p>\r\n<\/article>\r\n<article class=\"lysg-card\">\r\n<h3>Electrical separation<\/h3>\r\n<p>An open gap can provide very high impedance during normal operation. This is especially relevant for certain N-PE paths and leakage-sensitive applications.<\/p>\r\n<\/article>\r\n<article class=\"lysg-card\">\r\n<h3>Wave-shaping behaviour<\/h3>\r\n<p>After ignition, a well-designed spark gap can create a low-impedance discharge path. Dynamic sparkover, arc voltage and system coordination remain important.<\/p>\r\n<\/article>\r\n<\/div>\r\n<div class=\"lysg-warning\">\r\n<p><strong>Avoid a false hierarchy:<\/strong> \u201cspark gap = premium\u201d and \u201cMOV = low-end\u201d is not a valid engineering rule. Phoenix Contact publicly offers spark-gap, varistor-based and coordinated spark-gap-plus-varistor Type 1+2 structures, showing that multiple architectures can satisfy different project needs.<sup><a href=\"#ref-4\">[4]<\/a><\/sup><\/p>\r\n<\/div>\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section\" id=\"n-pe\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-section-head\">\r\n<div class=\"lysg-eyebrow\">System architecture<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"why-spark-gaps-are-widely-used-for-n-pe-protection-in-31-systems\"><\/span>Why spark gaps are widely used for N-PE protection in 3+1 systems<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>For a TT 3+1 arrangement, the N-PE path is not an afterthought. It can carry the combined discharge current from the phase-to-neutral protection paths.<\/p>\r\n<\/div>\r\n<div class=\"lysg-two-col\">\r\n<div>\r\n<p>In a typical three-phase 3+1 arrangement, three protection paths operate between L1-N, L2-N and L3-N. A separate protection path operates between N and PE.<\/p>\r\n<p>Spark-gap-based N-PE modules are widely used because they remain electrically separated during normal operation and provide a defined high-current discharge path during a surge.<\/p>\r\n<p>DEHN specifies spark-gap-based Type 1 N-PE arresters for 3+1 and 1+1 circuits between neutral and protective earth, including products intended for TT systems.<sup><a href=\"#ref-5\">[5]<\/a><\/sup><sup><a href=\"#ref-6\">[6]<\/a><\/sup><\/p>\r\n<div class=\"lysg-note\">\r\n<p><strong>Important:<\/strong> \u201c3+1\u201d describes a circuit arrangement. It does not guarantee that every supplier uses the same internal component technology, Iimp distribution or certificate wiring diagram.<\/p>\r\n<\/div>\r\n<\/div>\r\n<div class=\"lysg-card\">\r\n<h3>Verify the N-PE path separately<\/h3>\r\n<ul class=\"lysg-spec-list\">\r\n<li>System earthing arrangement<\/li>\r\n<li>N-PE Uc<\/li>\r\n<li>N-PE Up<\/li>\r\n<li>N-PE Iimp or Itotal<\/li>\r\n<li>1+1 or 3+1 circuit diagram<\/li>\r\n<li>Protection-mode marking<\/li>\r\n<li>Backup protection<\/li>\r\n<li>Exact certificate model<\/li>\r\n<\/ul>\r\n<\/div>\r\n<\/div>\r\n<figure class=\"lysg-figure\">\r\n<img loading=\"lazy\" alt=\"TT system 3 plus 1 SPD architecture with MOV phase paths and N-PE spark gap\" decoding=\"async\" height=\"1086\" loading=\"lazy\" src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/tt-3-plus-1-n-pe-spark-gap-protection-architecture.webp\" width=\"1448\"\/>\r\n<figcaption>Conceptual TT 3+1 architecture: phase-to-neutral voltage-limiting paths and a separate N-PE discharge path. Use the certified manufacturer wiring diagram for final installation.<\/figcaption>\r\n<\/figure>\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section lysg-section--soft\" id=\"follow-current\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-section-head\">\r\n<div class=\"lysg-eyebrow\">System availability<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"follow-current-is-one-of-the-most-important-spark-gap-procurement-checks\"><\/span>Follow current is one of the most important spark-gap procurement checks<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>It connects the SPD\u2019s internal structure to the actual short-circuit conditions and upstream protective device at the installation point.<\/p>\r\n<\/div>\r\n<div class=\"lysg-flow\">\r\n<article class=\"lysg-flow-step\">\r\n<h3>The gap fires<\/h3>\r\n<p>The surge raises the voltage above the dynamic sparkover level. The gap ionises and forms an arc path.<\/p>\r\n<\/article>\r\n<article class=\"lysg-flow-step\">\r\n<h3>The surge ends<\/h3>\r\n<p>The power system may continue feeding current through the low arc voltage. This is line follow current.<\/p>\r\n<\/article>\r\n<article class=\"lysg-flow-step\">\r\n<h3>The SPD must recover<\/h3>\r\n<p>The design must limit, extinguish or prevent this current without creating unacceptable upstream tripping or damage.<\/p>\r\n<\/article>\r\n<\/div>\r\n<div class=\"lysg-two-col\">\r\n<article class=\"lysg-card\">\r\n<h3>What the buyer should request<\/h3>\r\n<ul>\r\n<li>Ifi or equivalent follow-current performance data<\/li>\r\n<li>Prospective short-circuit current at the installation point<\/li>\r\n<li>Permitted upstream fuse or circuit breaker<\/li>\r\n<li>Backup-protection and selectivity requirements<\/li>\r\n<li>Short-circuit current rating of the complete SPD arrangement<\/li>\r\n<\/ul>\r\n<\/article>\r\n<article class=\"lysg-card\">\r\n<h3>Do not generalise all spark gaps<\/h3>\r\n<p>Traditional and modern designs can behave differently. Phoenix Contact documents triggered spark-gap products designed to operate without line follow current, while the Schneider Electrical Installation Guide defines Ifi as a spark-gap-related characteristic that must be considered against the prospective short-circuit current.<sup><a href=\"#ref-3\">[3]<\/a><\/sup><sup><a href=\"#ref-8\">[8]<\/a><\/sup><\/p>\r\n<\/article>\r\n<\/div>\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section\" id=\"response-time\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-section-head\">\r\n<div class=\"lysg-eyebrow\">Misleading shortcuts<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"why-%e2%80%9cresponse-time%e2%80%9d-alone-cannot-select-a-type-1-spd\"><\/span>Why \u201cresponse time\u201d alone cannot select a Type 1 SPD<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>A component-level nanosecond figure does not describe the installed voltage stress seen by downstream equipment.<\/p>\r\n<\/div>\r\n<div class=\"lysg-two-col\">\r\n<div class=\"lysg-card\">\r\n<h3>Actual protective performance also depends on<\/h3>\r\n<ul>\r\n<li>Dynamic sparkover voltage<\/li>\r\n<li>MOV voltage-current characteristic<\/li>\r\n<li>Impulse amplitude and waveform<\/li>\r\n<li>Declared and measured Up<\/li>\r\n<li>Internal and external inductance<\/li>\r\n<li>Connection conductor length<\/li>\r\n<li>Protection modes and downstream coordination<\/li>\r\n<\/ul>\r\n<\/div>\r\n<div class=\"lysg-warning\">\r\n<p><strong>Procurement rule:<\/strong> Do not approve a Type 1 SPD because a supplier claims a faster response time. Compare the complete device\u2019s certified ratings, voltage-time behaviour, installation conditions and backup-protection requirements.<\/p>\r\n<\/div>\r\n<\/div>\r\n<div class=\"lysg-section-head\">\r\n<h2><span class=\"ez-toc-section\" id=\"leakage-current-tov-and-ageing-require-different-checks\"><\/span>Leakage current, TOV and ageing require different checks<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<\/div>\r\n<div class=\"lysg-three-col\">\r\n<article class=\"lysg-card\">\r\n<h3>MOV-based designs<\/h3>\r\n<p>Verify Uc margin, TOV withstand, thermal stability, leakage-current behaviour, thermal disconnection and end-of-life indication. Sustained abnormal overvoltage can overheat an MOV if the protection design is inadequate.<sup><a href=\"#ref-7\">[7]<\/a><\/sup><\/p>\r\n<\/article>\r\n<article class=\"lysg-card\">\r\n<h3>Spark-gap designs<\/h3>\r\n<p>Verify dynamic sparkover, arc containment, follow-current performance, impulse endurance and recovery after discharge. Do not assume unlimited service life.<\/p>\r\n<\/article>\r\n<article class=\"lysg-card\">\r\n<h3>Hybrid designs<\/h3>\r\n<p>Verify that coordination is part of the tested product or manufacturer-approved system. Do not create an unverified hybrid by combining arbitrary modules.<\/p>\r\n<\/article>\r\n<\/div>\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section lysg-section--soft\" id=\"structure-selection\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-section-head\">\r\n<div class=\"lysg-eyebrow\">Application matrix<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"which-structure-should-a-b2b-buyer-evaluate\"><\/span>Which structure should a B2B buyer evaluate?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>The table is a starting point for specification review, not a universal product prescription.<\/p>\r\n<\/div>\r\n<div aria-label=\"Structure decision guide\" class=\"lysg-decision-grid\">\r\n<article class=\"lysg-decision-card lysg-decision-card--gap\">\r\n<div class=\"lysg-decision-label\">Evaluate a spark-gap design when<\/div>\r\n<h3>Lightning-current switching or N-PE isolation is central to the project<\/h3>\r\n<p>Focus on complete-device performance rather than assuming every spark gap provides the same result.<\/p>\r\n<ul>\r\n<li>The installation is at a Type 1 lightning-current boundary.<\/li>\r\n<li>A TT 1+1 or 3+1 N-PE discharge path must be verified.<\/li>\r\n<li>Normal-state electrical separation is important.<\/li>\r\n<li>Follow current, Ifi and upstream protection can be checked.<\/li>\r\n<\/ul>\r\n<\/article>\r\n<article class=\"lysg-decision-card\">\r\n<div class=\"lysg-decision-label\">Evaluate an MOV-based design when<\/div>\r\n<h3>Compact Type 1+2 voltage limiting and pluggable maintenance are priorities<\/h3>\r\n<p>The complete model must still pass the required Type 1 and Type 2 tests.<\/p>\r\n<ul>\r\n<li>Panel width and replaceable modules matter.<\/li>\r\n<li>Low declared Up is needed for coordinated protection.<\/li>\r\n<li>Uc, TOV and thermal-disconnection data are available.<\/li>\r\n<li>Certificate and short-circuit ratings match the project.<\/li>\r\n<\/ul>\r\n<\/article>\r\n<article class=\"lysg-decision-card lysg-decision-card--hybrid\">\r\n<div class=\"lysg-decision-label\">Evaluate a coordinated hybrid when<\/div>\r\n<h3>The project needs lightning-current handling and lower residual voltage in one system<\/h3>\r\n<p>Hybrid does not mean that arbitrary modules can be assembled together.<\/p>\r\n<ul>\r\n<li>The combination is tested or approved by the manufacturer.<\/li>\r\n<li>The protection modes and internal coordination are documented.<\/li>\r\n<li>N-PE technology is identified separately.<\/li>\r\n<li>Installation and backup-protection rules are clear.<\/li>\r\n<\/ul>\r\n<\/article>\r\n<\/div>\r\n<div aria-label=\"SPD application selection matrix\" class=\"lysg-table-shell\" role=\"region\" tabindex=\"0\">\r\n<table class=\"lysg-table\">\r\n<thead>\r\n<tr>\r\n<th>Application<\/th>\r\n<th>Structure to evaluate<\/th>\r\n<th>Primary engineering checks<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td data-label=\"Application\">Building with external LPS<\/td>\r\n<td data-label=\"Structure\">Certified Type 1 or Type 1+2, spark gap, MOV or approved hybrid<\/td>\r\n<td data-label=\"Checks\">Required Iimp, Up, LPZ position, protection modes and certificate scope<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Application\">Main industrial switchboard<\/td>\r\n<td data-label=\"Structure\">High-duty Type 1 or coordinated Type 1+2<\/td>\r\n<td data-label=\"Checks\">Iimp, Isccr, follow current, fuse coordination and availability<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Application\">TT-system main board<\/td>\r\n<td data-label=\"Structure\">1+1 or 3+1 arrangement with verified N-PE module<\/td>\r\n<td data-label=\"Checks\">N-PE Iimp\/Itotal, Uc, Up, system diagram and certificate<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Application\">Compact OEM panel<\/td>\r\n<td data-label=\"Structure\">Compact combined Type 1+2<\/td>\r\n<td data-label=\"Checks\">Width, heat, terminals, replacement format and documentation<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Application\">High fault-current location<\/td>\r\n<td data-label=\"Structure\">SPD with documented short-circuit and backup-protection performance<\/td>\r\n<td data-label=\"Checks\">Prospective fault current, Isccr, Ifi where relevant and upstream device<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Application\">Sensitive downstream equipment<\/td>\r\n<td data-label=\"Structure\">Coordinated Type 1\/Type 2 or verified combined SPD<\/td>\r\n<td data-label=\"Checks\">Up, connection length, residual-voltage behaviour and insulation coordination<\/td>\r\n<\/tr>\r\n<tr>\r\n<td data-label=\"Application\">Importer or distributor stock range<\/td>\r\n<td data-label=\"Structure\">Limited, clearly differentiated standard models<\/td>\r\n<td data-label=\"Checks\">Regional grid systems, Uc options, certificates, accessories and replacement modules<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section\" id=\"procurement\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-section-head\">\r\n<div class=\"lysg-eyebrow\">OEM and project procurement<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"type-1-spd-verification-workflow\"><\/span>Type 1 SPD verification workflow<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Move from system definition to document matching and sample approval. Do not begin with housing colour, logo or a headline kA number.<\/p>\r\n<\/div>\r\n<figure class=\"lysg-figure\">\r\n<img loading=\"lazy\" alt=\"Type 1 SPD OEM procurement verification workflow for spark gap and MOV designs\" decoding=\"async\" height=\"1086\" loading=\"lazy\" src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/type-1-spd-oem-procurement-verification-workflow.webp\" width=\"1448\"\/>\r\n<figcaption>B2B workflow for confirming system duty, internal architecture, electrical compatibility, documentation and sample approval before a project or OEM order.<\/figcaption>\r\n<\/figure>\r\n<div class=\"lysg-doc-grid\">\r\n<article class=\"lysg-doc-card\">\r\n<h3>1. System data<\/h3>\r\n<ul>\r\n<li>Nominal and maximum system voltage<\/li>\r\n<li>TN-C, TN-S, TT or IT arrangement<\/li>\r\n<li>Single-phase or three-phase<\/li>\r\n<li>External LPS and installation position<\/li>\r\n<li>Prospective short-circuit current<\/li>\r\n<li>Upstream protective device<\/li>\r\n<\/ul>\r\n<\/article>\r\n<article class=\"lysg-doc-card\">\r\n<h3>2. SPD specification<\/h3>\r\n<ul>\r\n<li>Type 1 or Type 1+2<\/li>\r\n<li>Iimp per protection mode<\/li>\r\n<li>Uc and Up<\/li>\r\n<li>N-PE Iimp or Itotal<\/li>\r\n<li>Follow-current performance<\/li>\r\n<li>Isccr and backup protection<\/li>\r\n<\/ul>\r\n<\/article>\r\n<article class=\"lysg-doc-card\">\r\n<h3>3. Verification documents<\/h3>\r\n<ul>\r\n<li>Exact model number<\/li>\r\n<li>IEC or EN certificate<\/li>\r\n<li>CB report when required<\/li>\r\n<li>Datasheet and wiring diagram<\/li>\r\n<li>Product marking and label sample<\/li>\r\n<li>Sample approval record<\/li>\r\n<\/ul>\r\n<\/article>\r\n<\/div>\r\n<div class=\"lysg-success\">\r\n<p><strong>Approval gate:<\/strong> The datasheet, certificate, test report, product marking, wiring diagram and physical sample should identify the same product configuration. Any mismatch should be clarified before project approval or bulk production.<\/p>\r\n<\/div>\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section lysg-section--soft\" id=\"leeyee-verification\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-section-head\">\r\n<div class=\"lysg-eyebrow\">First-party verification evidence<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"how-leeyee-turns-this-guide-into-a-verifiable-b2b-decision\"><\/span>How LEEYEE turns this guide into a verifiable B2B decision<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Technical content should connect to real product data, testing capability and certificate scope. Internal checks support engineering review, but they do not replace independent certification.<\/p>\r\n<\/div>\r\n<div class=\"lysg-evidence-layout\">\r\n<article class=\"lysg-evidence-panel\">\r\n<h3>Available engineering and production checks<\/h3>\r\n<p>LEEYEE publicly documents the following test and inspection capabilities for SPD development, production verification and buyer review.<sup><a href=\"#ref-9\">[9]<\/a><\/sup><\/p>\r\n<div class=\"lysg-test-grid\">\r\n<div class=\"lysg-test-item\">\r\n<b>MOV and GDT component testing<\/b>\r\n<p>Used to review component electrical behaviour before it is accepted into the finished SPD production process.<\/p>\r\n<\/div>\r\n<div class=\"lysg-test-item\">\r\n<b>Lightning impulse testing<\/b>\r\n<p>Used to evaluate declared impulse-current performance under the applicable waveform and test arrangement.<\/p>\r\n<\/div>\r\n<div class=\"lysg-test-item\">\r\n<b>Thermal stability testing<\/b>\r\n<p>Used to observe behaviour under sustained abnormal voltage and thermal stress conditions.<\/p>\r\n<\/div>\r\n<div class=\"lysg-test-item\">\r\n<b>Combination-wave testing<\/b>\r\n<p>Used to review SPD response under a combined voltage and current surge test environment.<\/p>\r\n<\/div>\r\n<\/div>\r\n<div class=\"lysg-evidence-note\">\r\n<strong>Evidence rule:<\/strong> For project approval, request the applicable test record, model marking, datasheet, wiring diagram and third-party certificate. A factory test photo alone does not prove the declared certification scope.\r\n            <\/div>\r\n<\/article>\r\n<article class=\"lysg-product-proof\">\r\n<div class=\"lysg-eyebrow\">Transparent product example<\/div>\r\n<h3>LEEYEE LY1-12.5\/1(S)+1 Type 1+2 SPD<\/h3>\r\n<p>This example shows why buyers must distinguish a power spark-gap structure from an MOV + GDT hybrid product.<\/p>\r\n<div class=\"lysg-proof-specs\">\r\n<div class=\"lysg-proof-spec\"><span>Configuration<\/span><strong>1P+N, L-N and N-PE protection modes<\/strong><\/div>\r\n<div class=\"lysg-proof-spec\"><span>Classification<\/span><strong>Class I+II \/ Type 1+2<\/strong><\/div>\r\n<div class=\"lysg-proof-spec\"><span>Declared Iimp<\/span><strong>12.5 kA L-N \/ 25 kA N-PE, 10\/350 \u03bcs<\/strong><\/div>\r\n<div class=\"lysg-proof-spec\"><span>Protection elements<\/span><strong>High-energy MOV + GDT<\/strong><\/div>\r\n<div class=\"lysg-proof-spec\"><span>Approval check<\/span><strong>Confirm Uc, Up, exact model and certificate configuration<\/strong><\/div>\r\n<\/div>\r\n<div class=\"lysg-proof-warning\">\r\n              A GDT used in an N-PE or hybrid product should not automatically be described as the same structure as a high-power Type 1 spark-gap arrester. Use the exact product documentation and test classification.<sup><a href=\"#ref-10\">[10]<\/a><\/sup>\r\n<\/div>\r\n<div class=\"lysg-proof-links\">\r\n<a href=\"https:\/\/www.cnspd.com\/ly1-12-51s1pluggable-single-pole-spd-product\/\">View the LY1-12.5\/1(S)+1 product data<\/a>\r\n<a href=\"https:\/\/www.cnspd.com\/patents-certificates\/\">Check LEEYEE certificate scope<\/a>\r\n<a href=\"https:\/\/www.cnspd.com\/shop\/type-12-surge-protective-device\/\">Compare Type 1+2 product options<\/a>\r\n<\/div>\r\n<\/article>\r\n<\/div>\r\n\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section\" id=\"buying-mistakes\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-section-head\">\r\n<div class=\"lysg-eyebrow\">Risk control<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"common-buying-mistakes\"><\/span>Common buying mistakes<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<\/div>\r\n<div class=\"lysg-mistake-grid\">\r\n<article class=\"lysg-mistake\">\r\n<div class=\"lysg-mistake-number\">01<\/div>\r\n<h3>Type 1 means spark gap<\/h3>\r\n<p>Type 1 is verified by the complete device\u2019s test classification and declared Iimp\u2014not the component label.<\/p>\r\n<\/article>\r\n<article class=\"lysg-mistake\">\r\n<div class=\"lysg-mistake-number\">02<\/div>\r\n<h3>MOV Type 1 is automatically inferior<\/h3>\r\n<p>A tested MOV-based Type 1+2 may fit the application. Compare the complete ratings and system requirements.<\/p>\r\n<\/article>\r\n<article class=\"lysg-mistake\">\r\n<div class=\"lysg-mistake-number\">03<\/div>\r\n<h3>Imax is treated as Iimp<\/h3>\r\n<p>Imax is normally associated with an 8\/20 \u03bcs waveform. Iimp is the Type 1 lightning impulse-current parameter.<\/p>\r\n<\/article>\r\n<article class=\"lysg-mistake\">\r\n<div class=\"lysg-mistake-number\">04<\/div>\r\n<h3>Response time decides everything<\/h3>\r\n<p>Up, waveform, wiring inductance, sparkover and system coordination are more useful than one nanosecond claim.<\/p>\r\n<\/article>\r\n<article class=\"lysg-mistake\">\r\n<div class=\"lysg-mistake-number\">05<\/div>\r\n<h3>The N-PE path is ignored<\/h3>\r\n<p>In TT 3+1 systems, the N-PE path may have different technology and total-current duty from L-N modules.<\/p>\r\n<\/article>\r\n<article class=\"lysg-mistake\">\r\n<div class=\"lysg-mistake-number\">06<\/div>\r\n<h3>Follow current is not checked<\/h3>\r\n<p>A spark-gap SPD must suit the prospective short-circuit conditions and upstream protective device.<\/p>\r\n<\/article>\r\n<article class=\"lysg-mistake\">\r\n<div class=\"lysg-mistake-number\">07<\/div>\r\n<h3>A product photo proves compliance<\/h3>\r\n<p>Only matched model data, certificates, reports, markings and samples support approval.<\/p>\r\n<\/article>\r\n<article class=\"lysg-mistake\">\r\n<div class=\"lysg-mistake-number\">08<\/div>\r\n<h3>Uc is selected by nominal voltage only<\/h3>\r\n<p>Uc must also suit the earthing arrangement, voltage tolerance and TOV conditions.<\/p>\r\n<\/article>\r\n<\/div>\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-cta\">\r\n<div class=\"lysg-cta-grid\">\r\n<div class=\"lysg-cta-copy\">\r\n<div class=\"lysg-eyebrow\">LEEYEE specification support<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"need-help-confirming-a-type-1-spd-specification\"><\/span>Need help confirming a Type 1 SPD specification?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Send the system voltage, earthing arrangement, required Iimp and certificate requirement. LEEYEE can help compare the protection structure, ratings and exact model scope before sample approval or OEM quotation.<\/p>\r\n<div class=\"lysg-cta-points\" aria-label=\"Specification support scope\">\r\n<span>System and protection mode<\/span>\r\n<span>Iimp, Uc and Up<\/span>\r\n<span>Certificate model check<\/span>\r\n<\/div>\r\n<\/div>\r\n<div class=\"lysg-cta-action\">\r\n<a class=\"lysg-btn leeyee-site-popup-btn\" href=\"javascript:void(0);\" role=\"button\"><span>Send Your SPD Requirements<\/span><\/a>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section lysg-section--soft\" id=\"related-guides\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-section-head\">\r\n<div class=\"lysg-eyebrow\">Related engineering guides<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"continue-the-type-1-and-spd-selection-process\"><\/span>Continue the Type 1 and SPD selection process<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Use these pages to verify the component technology, electrical ratings, system arrangement and procurement evidence in more detail.<\/p>\r\n<\/div>\r\n<div class=\"lysg-related-grid\">\r\n<a class=\"lysg-related-card\" href=\"https:\/\/www.cnspd.com\/mov-spd-vs-gdt-spd\/\">\r\n<span>Component technology<\/span>\r\n<strong>MOV SPD vs GDT SPD<\/strong>\r\n<p>Compare basic MOV and GDT behaviour for power, signal and hybrid protection applications.<\/p>\r\n<\/a>\r\n<a class=\"lysg-related-card\" href=\"https:\/\/www.cnspd.com\/spd-iimp-12-5ka-vs-25ka\/\">\r\n<span>Type 1 rating<\/span>\r\n<strong>Iimp 12.5 kA vs 25 kA<\/strong>\r\n<p>Understand lightning impulse-current ratings and how to compare per-pole and total values.<\/p>\r\n<\/a>\r\n<a class=\"lysg-related-card\" href=\"https:\/\/www.cnspd.com\/spd-up-voltage-protection-level\/\">\r\n<span>Protection level<\/span>\r\n<strong>SPD Up Selection Guide<\/strong>\r\n<p>Evaluate declared voltage protection level against equipment withstand and installation effects.<\/p>\r\n<\/a>\r\n<a class=\"lysg-related-card\" href=\"https:\/\/www.cnspd.com\/tt-system-spd\/\">\r\n<span>Earthing system<\/span>\r\n<strong>TT System SPD Guide<\/strong>\r\n<p>Review 1+1 and 3+1 arrangements, N-PE protection and TT-system selection logic.<\/p>\r\n<\/a>\r\n<a class=\"lysg-related-card\" href=\"https:\/\/www.cnspd.com\/3pn-spd-vs-4p-spd\/\">\r\n<span>Circuit arrangement<\/span>\r\n<strong>3P+N vs 4P SPD<\/strong>\r\n<p>Compare phase, neutral and protection-mode arrangements for three-phase distribution boards.<\/p>\r\n<\/a>\r\n<a class=\"lysg-related-card\" href=\"https:\/\/www.cnspd.com\/spd-certificate-verification\/\">\r\n<span>Document control<\/span>\r\n<strong>SPD Certificate Verification<\/strong>\r\n<p>Check whether the certificate, test report, product marking and quoted model actually match.<\/p>\r\n<\/a>\r\n<a class=\"lysg-related-card\" href=\"https:\/\/www.cnspd.com\/spd-selection-guide\/\">\r\n<span>Complete selection<\/span>\r\n<strong>SPD Selection Guide<\/strong>\r\n<p>Move from system voltage and earthing arrangement to ratings, wiring and project approval.<\/p>\r\n<\/a>\r\n<a class=\"lysg-related-card\" href=\"https:\/\/www.cnspd.com\/shop\/type-12-surge-protective-device\/\">\r\n<span>Available product scope<\/span>\r\n<strong>LEEYEE Type 1+2 SPD Range<\/strong>\r\n<p>Compare declared Iimp, voltage options, pole arrangements, replaceable modules and available certificate documents.<\/p>\r\n<\/a>\r\n<a class=\"lysg-related-card\" href=\"https:\/\/www.cnspd.com\/spd-type1-vs-type2-vs-type-3\/\">\r\n<span>SPD classification<\/span>\r\n<strong>Type 1 vs Type 2 vs Type 3 SPD<\/strong>\r\n<p>Compare test classes, installation positions, waveforms and coordination across the protection concept.<\/p>\r\n<\/a>\r\n<\/div>\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section\" id=\"faq\">\r\n<div class=\"lysg-container\">\r\n<div class=\"lysg-section-head\">\r\n<div class=\"lysg-eyebrow\">Frequently asked questions<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"spark-gap-spd-vs-mov-spd-faq\"><\/span>Spark gap SPD vs MOV SPD FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<\/div>\r\n<div class=\"lysg-faq\">\r\n<details>\r\n<summary>Is a spark gap better than an MOV for a Type 1 SPD?<\/summary>\r\n<div class=\"lysg-faq-answer\"><p>Not in every application. Spark gaps are widely used for high lightning-current and N-PE duties. MOVs provide voltage-limiting behaviour and can be used in tested Type 1+2 products. Select the complete SPD according to the system, ratings and documentation.<\/p><\/div>\r\n<\/details>\r\n<details>\r\n<summary>Can an MOV-based SPD pass Type 1 requirements?<\/summary>\r\n<div class=\"lysg-faq-answer\"><p>Yes. The manufacturer must demonstrate that the complete SPD or declared protection mode meets the applicable Type 1 test requirements and ratings. Phoenix Contact publicly lists varistor-based Type 1+2 products, which confirms that Type 1+2 is not limited to spark-gap architecture.<sup><a href=\"#ref-4\">[4]<\/a><\/sup><\/p><\/div>\r\n<\/details>\r\n<details>\r\n<summary>Why is a spark gap often used between N and PE?<\/summary>\r\n<div class=\"lysg-faq-answer\"><p>It can provide electrical separation during normal operation and a high-current discharge path during a surge. Spark-gap-based N-PE arresters are widely used in 1+1 and 3+1 circuits, especially for TT applications.<sup><a href=\"#ref-5\">[5]<\/a><\/sup><\/p><\/div>\r\n<\/details>\r\n<details>\r\n<summary>Does every spark gap produce line follow current?<\/summary>\r\n<div class=\"lysg-faq-answer\"><p>No. Follow-current behaviour depends on the design. Some products specify an extinguishing capability, while modern triggered designs may be engineered to operate without line follow current. Verify the exact model data.<\/p><\/div>\r\n<\/details>\r\n<details>\r\n<summary>Does a spark-gap SPD have zero voltage protection level?<\/summary>\r\n<div class=\"lysg-faq-answer\"><p>No. The installed voltage stress includes dynamic sparkover, arc voltage, internal inductance and connection effects. Use the declared and tested Up of the complete device.<\/p><\/div>\r\n<\/details>\r\n<details>\r\n<summary>Does Type 1+2 always contain both a spark gap and an MOV?<\/summary>\r\n<div class=\"lysg-faq-answer\"><p>No. Type 1+2 means the complete device fulfils the declared Type 1 and Type 2 requirements. The internal architecture may be spark-gap-based, MOV-based or a coordinated combination.<\/p><\/div>\r\n<\/details>\r\n<details>\r\n<summary>What should an OEM buyer verify first?<\/summary>\r\n<div class=\"lysg-faq-answer\"><p>Start with system voltage, earthing arrangement, protection modes, installation position, required Iimp, Uc, Up, short-circuit conditions and certificate requirements. Discuss branding and packaging only after the technical configuration is confirmed.<\/p><\/div>\r\n<\/details>\r\n<details>\r\n<summary>Should a 100 kA headline be used to compare Type 1 SPDs?<\/summary>\r\n<div class=\"lysg-faq-answer\"><p>No. Determine whether the value is Iimp, Itotal, In or Imax; identify the waveform and protection mode; and verify whether it applies per pole, per path or to the complete assembly.<\/p><\/div>\r\n<\/details>\r\n<\/div>\r\n<\/div>\r\n<\/section>\r\n<section class=\"lysg-section lysg-section--soft\" id=\"references\">\r\n<div class=\"lysg-container lysg-narrow\">\r\n<div class=\"lysg-section-head\">\r\n<div class=\"lysg-eyebrow\">Authoritative sources<\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"references\"><\/span>References<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Technical statements were reviewed against current IEC pages, primary manufacturer engineering resources and clearly identified LEEYEE first-party product and testing information.<\/p>\r\n<\/div>\r\n<div class=\"lysg-revision-box\">\r\n<div>\r\n<strong>Technical review and update status<\/strong>\r\n<p>Reviewed by the LEEYEE Technical Team. Last updated July 23, 2026.<\/p>\r\n<\/div>\r\n<div>\r\n<ul><li>Removed the internal H1 and landing-page hero because the WordPress template supplies the page title.<\/li><li>Moved the Quick Answer, contents and update information to a compact article opening.<\/li><li>Placed all three engineering infographics inside their relevant technical sections.<\/li><li>Reduced promotional elements to one light B2B specification CTA.<\/li><li>Converted desktop tables into readable mobile cards without horizontal scrolling.<\/li><\/ul>\r\n<\/div>\r\n<\/div>\r\n<ol class=\"lysg-references\">\r\n<li id=\"ref-1\"><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/65314\" rel=\"noopener noreferrer\" target=\"_blank\">IEC 61643-11:2025 \u2014 Low-voltage surge protective devices connected to AC low-voltage power systems: requirements and test methods.<\/a><\/li>\r\n<li id=\"ref-2\"><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/65315\" rel=\"noopener noreferrer\" target=\"_blank\">IEC 61643-01:2024 \u2014 Low-voltage surge protective devices: general requirements and test methods.<\/a><\/li>\r\n<li id=\"ref-3\"><a href=\"https:\/\/www.electrical-installation.org\/enwiki\/The_Surge_Protection_Device_%28SPD%29\" rel=\"noopener noreferrer\" target=\"_blank\">Schneider Electric Electrical Installation Guide \u2014 The Surge Protection Device (SPD), including Iimp, Up and Ifi explanations.<\/a><\/li>\r\n<li id=\"ref-4\"><a href=\"https:\/\/www.phoenixcontact.com\/en-pc\/products\/surge-protection\/surge-protection-for-power-supplies\/type1-surge-protection\" rel=\"noopener noreferrer\" target=\"_blank\">Phoenix Contact \u2014 Type 1+2 surge protection, including spark-gap, varistor-based and coordinated hybrid product structures.<\/a><\/li>\r\n<li id=\"ref-5\"><a href=\"https:\/\/www.dehn-international.com\/store\/h\/en-DE\/H679\/n-pe-lightning-current-arresters\" rel=\"noopener noreferrer\" target=\"_blank\">DEHN \u2014 N-PE lightning current arresters for 1+1 and 3+1 circuits.<\/a><\/li>\r\n<li id=\"ref-6\"><a href=\"https:\/\/www.dehn-international.com\/store\/p\/en-DE\/F31222\/dehngap\" rel=\"noopener noreferrer\" target=\"_blank\">DEHN \u2014 DEHNgap spark-gap-based total-current arrester for TT-system 1+1 and 3+1 configurations.<\/a><\/li>\r\n<li id=\"ref-7\"><a href=\"https:\/\/www.littelfuse.com\/products\/overvoltage-protection\/varistors\/radial-leaded-varistors\/tmov25s-and-itmov25s\/tmov25sp320m\" rel=\"noopener noreferrer\" target=\"_blank\">Littelfuse \u2014 Thermally protected MOV information covering sustained abnormal overvoltage and overheating protection.<\/a><\/li>\r\n<li id=\"ref-8\"><a href=\"https:\/\/www.phoenixcontact.com\/en-sg\/technologies\/surge-protection-technology\/spark-gap-technology\" rel=\"noopener noreferrer\" target=\"_blank\">Phoenix Contact \u2014 Spark-gap technology, residual-voltage behaviour and no-line-follow-current designs.<\/a><\/li>\r\n<li id=\"ref-9\"><a href=\"https:\/\/www.cnspd.com\/spd-manufacturer2\/\" rel=\"noopener noreferrer\" target=\"_blank\">LEEYEE \u2014 documented SPD production and verification equipment, including MOV\/GDT testing, lightning impulse, thermal stability and combination-wave testing.<\/a><\/li>\r\n<li id=\"ref-10\"><a href=\"https:\/\/www.cnspd.com\/ly1-12-51s1pluggable-single-pole-spd-product\/\" rel=\"noopener noreferrer\" target=\"_blank\">LEEYEE LY1-12.5\/1(S)+1 \u2014 Type 1+2, L-N\/N-PE product data with declared MOV + GDT protection elements and impulse-current ratings.<\/a><\/li>\r\n<li id=\"ref-11\"><a href=\"https:\/\/www.cnspd.com\/patents-certificates\/\" rel=\"noopener noreferrer\" target=\"_blank\">LEEYEE Certificates \u2014 selected LY1-12.5 and LY1-7 Type 1+2 certificate scope and model-verification guidance.<\/a><\/li>\r\n<\/ol>\r\n<p class=\"lysg-source-note\">Standards and product portfolios change. Confirm the edition, certificate status, national adoption and exact manufacturer model required by the project before approval.<\/p>\r\n<\/div>\r\n<\/section>\r\n<\/main>\r\n<div class=\"lysg-footer-mark\">\r\n<strong>LEEYEE<\/strong> \u2014 Built to Protect. Trusted to Last.<br\/>\r\n    CNSPD is LEEYEE\u2019s surge protection-focused platform for global B2B buyers.\r\n  <\/div>\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@graph\": [\r\n    {\r\n      \"@type\": \"WebPage\",\r\n      \"@id\": \"https:\/\/www.cnspd.com\/spark-gap-spd-vs-mov-spd\/#webpage\",\r\n      \"url\": \"https:\/\/www.cnspd.com\/spark-gap-spd-vs-mov-spd\/\",\r\n      \"name\": \"Spark Gap SPD vs MOV SPD: Type 1, Type 1+2 and N-PE Selection Guide\",\r\n      \"description\": \"Compare spark gap and MOV Type 1 SPDs by Iimp, Up, follow current, N-PE 3+1 design, certification and OEM selection requirements.\",\r\n      \"datePublished\": \"2026-07-23\",\r\n      \"dateModified\": \"2026-07-23\",\r\n      \"primaryImageOfPage\": {\r\n        \"@type\": \"ImageObject\",\r\n        \"@id\": \"https:\/\/www.cnspd.com\/spark-gap-spd-vs-mov-spd\/#primaryimage\",\r\n        \"url\": \"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/spark-gap-vs-mov-type-1-spd-structure-comparison.webp\",\r\n        \"width\": 1448,\r\n        \"height\": 1086\r\n      }\r\n    },\r\n    {\r\n      \"@type\": \"Article\",\r\n      \"@id\": \"https:\/\/www.cnspd.com\/spark-gap-spd-vs-mov-spd\/#article\",\r\n      \"headline\": \"Spark Gap SPD vs MOV SPD: Type 1, Type 1+2 and N-PE Selection Guide\",\r\n      \"description\": \"Compare spark gap and MOV Type 1 SPDs by Iimp, Up, follow current, N-PE 3+1 design, certification and OEM selection requirements.\",\r\n      \"mainEntityOfPage\": {\r\n        \"@id\": \"https:\/\/www.cnspd.com\/spark-gap-spd-vs-mov-spd\/#webpage\"\r\n      },\r\n      \"datePublished\": \"2026-07-23\",\r\n      \"dateModified\": \"2026-07-23\",\r\n      \"author\": {\r\n        \"@type\": \"Organization\",\r\n        \"name\": \"LEEYEE\",\r\n        \"url\": \"https:\/\/www.cnspd.com\/about-us\/\"\r\n      },\r\n      \"reviewedBy\": {\r\n        \"@type\": \"Organization\",\r\n        \"name\": \"LEEYEE Technical Team\",\r\n        \"url\": \"https:\/\/www.cnspd.com\/about-us\/\"\r\n      },\r\n      \"publisher\": {\r\n        \"@type\": \"Organization\",\r\n        \"name\": \"LEEYEE\",\r\n        \"url\": \"https:\/\/www.cnspd.com\/\"\r\n      },\r\n      \"image\": [\r\n        {\r\n          \"@id\": \"https:\/\/www.cnspd.com\/spark-gap-spd-vs-mov-spd\/#primaryimage\"\r\n        },\r\n        \"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/tt-3-plus-1-n-pe-spark-gap-protection-architecture.webp\",\r\n        \"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/type-1-spd-oem-procurement-verification-workflow.webp\"\r\n      ],\r\n      \"about\": [\r\n        \"Spark gap surge protective device\",\r\n        \"MOV surge protective device\",\r\n        \"Type 1 SPD\",\r\n        \"Type 1+2 SPD\",\r\n        \"N-PE surge protection\",\r\n        \"TT system 3+1 SPD\"\r\n      ]\r\n    },\r\n    {\r\n      \"@type\": \"FAQPage\",\r\n      \"@id\": \"https:\/\/www.cnspd.com\/spark-gap-spd-vs-mov-spd\/#faq-schema\",\r\n      \"mainEntity\": [\r\n        {\r\n          \"@type\": \"Question\",\r\n          \"name\": \"Is a spark gap better than an MOV for a Type 1 SPD?\",\r\n          \"acceptedAnswer\": {\r\n            \"@type\": \"Answer\",\r\n            \"text\": \"Not in every application. Spark gaps are widely evaluated for high lightning-current and N-PE switching duties. MOVs provide voltage-limiting behaviour and can be used in tested Type 1+2 products. Select the complete SPD according to the system, ratings, protection modes and documentation.\"\r\n          }\r\n        },\r\n        {\r\n          \"@type\": \"Question\",\r\n          \"name\": \"Can an MOV-based SPD pass Type 1 requirements?\",\r\n          \"acceptedAnswer\": {\r\n            \"@type\": \"Answer\",\r\n            \"text\": \"Yes. Type 1 is a complete-device or declared protection-mode test classification. The manufacturer must demonstrate the applicable Type 1 impulse-current performance and other required ratings.\"\r\n          }\r\n        },\r\n        {\r\n          \"@type\": \"Question\",\r\n          \"name\": \"Why is a spark gap often used between N and PE?\",\r\n          \"acceptedAnswer\": {\r\n            \"@type\": \"Answer\",\r\n            \"text\": \"It can provide electrical separation during normal operation and a defined high-current discharge path during a surge. Spark-gap-based N-PE arresters are widely used in 1+1 and 3+1 circuits, especially for TT applications.\"\r\n          }\r\n        },\r\n        {\r\n          \"@type\": \"Question\",\r\n          \"name\": \"Does every spark gap produce line follow current?\",\r\n          \"acceptedAnswer\": {\r\n            \"@type\": \"Answer\",\r\n            \"text\": \"No. Follow-current behaviour depends on the design. Some products specify an extinguishing capability, while modern triggered designs may be engineered to operate without line follow current.\"\r\n          }\r\n        },\r\n        {\r\n          \"@type\": \"Question\",\r\n          \"name\": \"Does Type 1+2 always contain both a spark gap and an MOV?\",\r\n          \"acceptedAnswer\": {\r\n            \"@type\": \"Answer\",\r\n            \"text\": \"No. Type 1+2 means the complete device fulfils the declared Type 1 and Type 2 requirements. Its internal architecture may be spark-gap-based, MOV-based or a coordinated combination.\"\r\n          }\r\n        }\r\n      ]\r\n    }\r\n  ]\r\n}\r\n  <\/script>\r\n<\/article>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Spark gap SPD vs MOV SPD is not a simple \u201cbetter or worse\u201d comparison. A spark gap uses voltage-switching behaviour. An MOV uses voltage-limiting behaviour. This guide explains how those structures affect Type 1, Type 1+2, N-PE and 3+1 selection for engineering procurement and OEM approval. Last updated: July 23, 2026 Technical review: LEEYEE Technical&#8230;<\/p>","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,488,422],"tags":[],"class_list":["post-30375","post","type-post","status-publish","format-standard","hentry","category-news","category-surge-protection","category-industry-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Spark Gap SPD vs MOV SPD | Type 1 &amp; N-PE Guide<\/title>\n<meta name=\"description\" content=\"Compare spark gap and MOV Type 1 SPDs by Iimp, Up, follow current, N-PE 3+1 design, certification and OEM selection requirements.\" \/>\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\/es\/spark-gap-spd-vs-mov-spd\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spark Gap SPD vs MOV SPD | Type 1 &amp; N-PE Guide\" \/>\n<meta property=\"og:description\" content=\"Compare spark gap and MOV Type 1 SPDs by Iimp, Up, follow current, N-PE 3+1 design, certification and OEM selection requirements.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cnspd.com\/es\/spark-gap-spd-vs-mov-spd\/\" \/>\n<meta property=\"og:site_name\" content=\"Surge Protector, Surge Arrestor, Isolating Switch - 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