{"id":29662,"date":"2026-06-30T15:16:37","date_gmt":"2026-06-30T07:16:37","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=29662"},"modified":"2026-07-01T11:08:29","modified_gmt":"2026-07-01T03:08:29","slug":"spd-uc-vs-mcov-difference-for-oem-labels-and-datasheets","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/it\/spd-uc-vs-mcov-oem-labels\/","title":{"rendered":"SPD Uc vs MCOV: Differenza per etichette OEM e schede tecniche"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"29662\" class=\"elementor elementor-29662\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1799214 e-flex e-con-boxed e-con e-parent\" data-id=\"1799214\" 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-bcb6147 elementor-widget elementor-widget-html\" data-id=\"bcb6147\" data-element_type=\"widget\" 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{\r\n      font-size: 16.5px !important;\r\n      line-height: 1.62 !important;\r\n    }\r\n\r\n    .cn-article-meta {\r\n      gap: 6px;\r\n      margin: 14px 0 22px;\r\n    }\r\n\r\n    .cn-article-meta span {\r\n      font-size: 12.5px;\r\n      padding: 5px 8px;\r\n    }\r\n\r\n    .cn-toc,\r\n    .cn-warning,\r\n    .cn-good,\r\n    .cn-checklist,\r\n    .cn-cta {\r\n      border-radius: 16px;\r\n      padding: 16px;\r\n    }\r\n\r\n    .cn-note {\r\n      padding: 16px;\r\n      margin: 18px 0 24px;\r\n      border-left-width: 4px;\r\n      border-radius: 0 14px 14px 0;\r\n    }\r\n\r\n    .cn-table {\r\n      min-width: 720px;\r\n    }\r\n\r\n    .cn-doc-cards {\r\n      grid-template-columns: 1fr;\r\n      gap: 12px;\r\n      margin: 20px 0 26px;\r\n    }\r\n\r\n    .cn-doc-card {\r\n      padding: 16px;\r\n      border-radius: 16px;\r\n    }\r\n\r\n    .cn-doc-card strong {\r\n      font-size: 16.5px;\r\n    }\r\n\r\n    .cn-doc-card p {\r\n      font-size: 15.5px;\r\n    }\r\n\r\n    .cn-cta {\r\n      margin: 26px 0;\r\n    }\r\n\r\n    .cn-cta-title {\r\n      font-size: 18px;\r\n      line-height: 1.35;\r\n    }\r\n\r\n    .cn-btn {\r\n      width: 100% !important;\r\n      min-height: 46px !important;\r\n      padding: 12px 16px !important;\r\n    }\r\n\r\n    .cn-checklist li {\r\n      font-size: 15.5px;\r\n      margin: 9px 0;\r\n      padding-left: 26px;\r\n    }\r\n\r\n    .cn-faq summary {\r\n      font-size: 16px;\r\n      line-height: 1.45;\r\n      padding-right: 24px;\r\n    }\r\n\r\n    .cn-related ul {\r\n      padding-left: 18px;\r\n    }\r\n\r\n    .cn-related span {\r\n      font-size: 14.5px;\r\n    }\r\n  }\r\n<\/style>\r\n\r\n<article class=\"cn-article\">\r\n\r\n  <div class=\"cn-article-label\">OEM Documentation Guide<\/div>\r\n\r\n  <p class=\"cn-article-intro\">\r\n    OEM buyers often compare surge protective devices from IEC-style and UL-style markets.\r\n    One datasheet may use <strong>Uc<\/strong>, while another may use <strong>MCOV<\/strong>.\r\n    This guide explains how to align the wording on SPD labels, datasheets, packaging and test files before private label production.\r\n  <\/p>\r\n\r\n  <div class=\"cn-article-meta\">\r\n    <span>For OEM buyers<\/span>\r\n    <span>For private label SPD orders<\/span>\r\n    <span>Uc vs MCOV wording<\/span>\r\n    <span>Reading time: 7\u20139 minutes<\/span>\r\n  <\/div>\r\n\r\n  <div class=\"cn-note\">\r\n    <p>\r\n      <strong>Quick answer:<\/strong> Uc and MCOV serve a similar technical role, but they are not label-interchangeable marketing words.\r\n      IEC-style SPD documents commonly use Uc.\r\n      UL 1449-style documents commonly use MCOV.\r\n      For OEM orders, the label wording should match the target market, datasheet, packaging, test file and certification evidence.\r\n    <\/p>\r\n  <\/div>\r\n\r\n  <nav class=\"cn-toc\">\r\n    <div class=\"cn-toc-title\">In this guide<\/div>\r\n    <ol>\r\n      <li><a href=\"#quick-answer\">Quick answer for OEM buyers<\/a><\/li>\r\n      <li><a href=\"#uc-mcov-meaning\">What Uc and MCOV mean in documentation<\/a><\/li>\r\n      <li><a href=\"#market-wording\">IEC-style vs UL 1449-style wording<\/a><\/li>\r\n      <li><a href=\"#where-appears\">Where Uc or MCOV appears in an OEM order<\/a><\/li>\r\n      <li><a href=\"#document-consistency\">Why labels, datasheets and files must match<\/a><\/li>\r\n      <li><a href=\"#ul-warning\">Does MCOV wording mean UL listed?<\/a><\/li>\r\n      <li><a href=\"#label-checklist\">What to confirm before printing OEM labels<\/a><\/li>\r\n      <li><a href=\"#mistakes\">Common OEM documentation mistakes<\/a><\/li>\r\n      <li><a href=\"#faq\">FAQ<\/a><\/li>\r\n    <\/ol>\r\n  <\/nav>\r\n\r\n  <section id=\"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\/it\/spd-uc-vs-mcov-oem-labels\/#quick-answer-for-oem-buyers\" >Quick Answer for OEM Buyers<\/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\/it\/spd-uc-vs-mcov-oem-labels\/#what-uc-and-mcov-mean-in-spd-documentation\" >What Uc and MCOV Mean in SPD Documentation<\/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\/it\/spd-uc-vs-mcov-oem-labels\/#iec-style-vs-ul-1449-style-wording\" >IEC-Style vs UL 1449-Style Wording<\/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\/it\/spd-uc-vs-mcov-oem-labels\/#where-uc-or-mcov-appears-in-an-oem-spd-order\" >Where Uc or MCOV Appears in an OEM SPD Order<\/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\/it\/spd-uc-vs-mcov-oem-labels\/#why-labels-datasheets-and-files-must-match\" >Why Labels, Datasheets and Files Must Match<\/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\/it\/spd-uc-vs-mcov-oem-labels\/#does-mcov-wording-mean-the-spd-is-ul-listed\" >Does MCOV Wording Mean the SPD Is UL Listed?<\/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\/it\/spd-uc-vs-mcov-oem-labels\/#what-to-confirm-before-printing-oem-spd-labels\" >What to Confirm Before Printing OEM SPD Labels<\/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\/it\/spd-uc-vs-mcov-oem-labels\/#common-oem-documentation-mistakes\" >Common OEM Documentation Mistakes<\/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\/it\/spd-uc-vs-mcov-oem-labels\/#faq-spd-uc-vs-mcov-for-oem-labels-and-datasheets\" >FAQ: SPD Uc vs MCOV for OEM Labels and Datasheets<\/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\/it\/spd-uc-vs-mcov-oem-labels\/#related-spd-uc-mcov-guides\" >Related SPD Uc \/ MCOV Guides<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"quick-answer-for-oem-buyers\"><\/span>Quick Answer for OEM Buyers<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      If your customer is from an IEC-style market, the SPD datasheet and product label will usually show <strong>Uc<\/strong>.\r\n      If your customer is from a UL 1449-style market, the technical documents often use <strong>MCOV<\/strong>.\r\n    <\/p>\r\n\r\n    <p>\r\n      The purpose is similar: both help confirm the maximum continuous voltage condition for the SPD.\r\n      But the wording should not be changed casually.\r\n      In an OEM order, the wording must match the target market and the evidence file behind the product.\r\n    <\/p>\r\n\r\n    <div class=\"cn-good\">\r\n      <p>\r\n        <strong>Simple rule:<\/strong> before printing OEM SPD labels, confirm the target market, required standard, voltage wording, datasheet format, product marking, packaging language and certification claim together.\r\n      <\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"uc-mcov-meaning\">\r\n    <h2><span class=\"ez-toc-section\" id=\"what-uc-and-mcov-mean-in-spd-documentation\"><\/span>What Uc and MCOV Mean in SPD Documentation<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      <strong>Uc<\/strong> means maximum continuous operating voltage in IEC-style SPD documentation.\r\n      It is the maximum voltage that can be continuously applied to the SPD under normal service conditions.\r\n    <\/p>\r\n\r\n    <p>\r\n      <strong>MCOV<\/strong> also means maximum continuous operating voltage in UL-style SPD documents.\r\n      Buyers often see MCOV in North America-oriented product files, labels or technical catalogues.\r\n    <\/p>\r\n\r\n    <p>\r\n      For purchasing teams, the important point is not only the definition.\r\n      The important point is whether the label, datasheet, test evidence and customer approval document are using the same terminology correctly.\r\n    <\/p>\r\n\r\n    <div class=\"cn-warning\">\r\n      <p>\r\n        <strong>Professional note:<\/strong> Uc and MCOV have a similar role, but they should not be treated as casual translation equivalents.\r\n        The wording should follow the applicable standard, product approval route and target market.\r\n      <\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"market-wording\">\r\n    <h2><span class=\"ez-toc-section\" id=\"iec-style-vs-ul-1449-style-wording\"><\/span>IEC-Style vs UL 1449-Style Wording<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      OEM SPD buyers often source from one country and sell into another market.\r\n      This is why voltage terminology becomes a documentation issue, not only a technical issue.\r\n    <\/p>\r\n\r\n    <div class=\"cn-table-wrap\">\r\n      <table class=\"cn-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Document style<\/th>\r\n            <th>Common wording<\/th>\r\n            <th>Where buyers see it<\/th>\r\n            <th>What OEM buyers should confirm<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>IEC-style documents<\/td>\r\n            <td>Uc<\/td>\r\n            <td>Datasheet, technical catalogue, product marking, instruction sheet.<\/td>\r\n            <td>Confirm that the Uc value matches the approved product file and the target project requirement.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>UL 1449-style documents<\/td>\r\n            <td>MCOV<\/td>\r\n            <td>North America-oriented datasheet, product marking, approval-related documents.<\/td>\r\n            <td>Confirm MCOV wording, actual certification status and whether the product is allowed to carry the requested claim.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>GB\/T 18802.1-style or local IEC-based documents<\/td>\r\n            <td>Uc<\/td>\r\n            <td>Local technical files, catalogue pages, project documents and supplier datasheets.<\/td>\r\n            <td>Confirm whether local wording follows IEC-style documentation or a project-specific requirement.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Mixed export OEM orders<\/td>\r\n            <td>Uc \/ MCOV<\/td>\r\n            <td>Private label artwork, packaging, datasheet, model code and customer approval files.<\/td>\r\n            <td>Confirm one consistent documentation route before printing labels or mass-producing packaging.<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"where-appears\">\r\n    <h2><span class=\"ez-toc-section\" id=\"where-uc-or-mcov-appears-in-an-oem-spd-order\"><\/span>Where Uc or MCOV Appears in an OEM SPD Order<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      In private label SPD orders, voltage wording appears in more places than many buyers expect.\r\n      If one file is changed but another file is not updated, the order can become inconsistent.\r\n    <\/p>\r\n\r\n    <div class=\"cn-doc-cards\">\r\n      <div class=\"cn-doc-card\">\r\n        <strong>Product label<\/strong>\r\n        <p>\r\n          The printed label should show the correct Uc or MCOV wording, voltage rating, type, model number and safety markings.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"cn-doc-card\">\r\n        <strong>Datasheet<\/strong>\r\n        <p>\r\n          The datasheet should use the same voltage term and rating as the product label and quotation.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"cn-doc-card\">\r\n        <strong>Packaging<\/strong>\r\n        <p>\r\n          Box labels, cartons and user-facing packaging should not claim a different rating or standard from the product file.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"cn-doc-card\">\r\n        <strong>Instruction sheet<\/strong>\r\n        <p>\r\n          Wiring diagrams, installation notes and safety warnings should match the SPD type and voltage documentation.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"cn-doc-card\">\r\n        <strong>Test file<\/strong>\r\n        <p>\r\n          Test reports and approval evidence should support the rating and wording used in the commercial documents.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"cn-doc-card\">\r\n        <strong>Model code<\/strong>\r\n        <p>\r\n          If the model name includes a voltage value, it should not conflict with the datasheet and product marking.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"document-consistency\">\r\n    <h2><span class=\"ez-toc-section\" id=\"why-labels-datasheets-and-files-must-match\"><\/span>Why Labels, Datasheets and Files Must Match<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      OEM SPD orders are not only judged by the product sample.\r\n      Buyers, distributors, panel builders and project engineers also check the documentation around the product.\r\n    <\/p>\r\n\r\n    <p>\r\n      If the label says one voltage term, the datasheet says another, and the packaging makes a certification claim that the test file does not support, the buyer may lose trust even if the product itself is suitable.\r\n    <\/p>\r\n\r\n    <div class=\"cn-table-wrap\">\r\n      <table class=\"cn-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Mismatch<\/th>\r\n            <th>Why it creates risk<\/th>\r\n            <th>Better practice<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>Label shows MCOV, datasheet shows Uc only<\/td>\r\n            <td>The customer may think the product follows a UL-style documentation route.<\/td>\r\n            <td>Confirm whether MCOV wording is supported before using it on the label.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Model code includes one voltage, datasheet lists another<\/td>\r\n            <td>Sales, warehouse and after-sales teams may identify the wrong product.<\/td>\r\n            <td>Align model code, rating table and label artwork before production.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Packaging claims a standard not supported by evidence<\/td>\r\n            <td>This can create approval, customs or customer audit problems.<\/td>\r\n            <td>Separate technical wording from certification claims and check the evidence file.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Different documents use different voltage terms<\/td>\r\n            <td>Panel builders and project engineers may question whether the product file is controlled.<\/td>\r\n            <td>Use one approved documentation route for each target market.<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"ul-warning\">\r\n    <h2><span class=\"ez-toc-section\" id=\"does-mcov-wording-mean-the-spd-is-ul-listed\"><\/span>Does MCOV Wording Mean the SPD Is UL Listed?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      No.\r\n      MCOV is a technical wording commonly seen in UL 1449-style SPD documents, but writing MCOV on a label does not automatically mean the product is UL listed, UL recognized or approved for a specific market.\r\n    <\/p>\r\n\r\n    <p>\r\n      Certification status should be confirmed separately from the wording used on the label or datasheet.\r\n      A product can use a similar voltage concept in technical discussion, but certification claims require real supporting evidence.\r\n    <\/p>\r\n\r\n    <div class=\"cn-warning\">\r\n      <p>\r\n        <strong>Important:<\/strong> do not print UL-related claims, marks or wording unless the approval route and documentation support them.\r\n        For OEM orders, confirm certification status before label artwork and packaging are finalized.\r\n      <\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"label-checklist\">\r\n    <h2><span class=\"ez-toc-section\" id=\"what-to-confirm-before-printing-oem-spd-labels\"><\/span>What to Confirm Before Printing OEM SPD Labels<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      Before mass production, OEM buyers should freeze the technical wording and document set.\r\n      This prevents late-stage changes after labels, cartons and datasheets have already been printed.\r\n    <\/p>\r\n\r\n    <div class=\"cn-checklist\">\r\n      <ul>\r\n        <li>Target market: IEC-style, UL 1449-style, GB\/T 18802.1-style, or local project requirement.<\/li>\r\n        <li>Correct voltage term: Uc, MCOV, or both only when supported by the documentation route.<\/li>\r\n        <li>Voltage rating shown on the product label and datasheet.<\/li>\r\n        <li>SPD type, pole structure, protection mode and wiring diagram.<\/li>\r\n        <li>Model code, logo, brand name and private label artwork.<\/li>\r\n        <li>Datasheet language, rating table and product description.<\/li>\r\n        <li>Packaging text, carton label and instruction sheet.<\/li>\r\n        <li>Test report, certification evidence and any approval claim.<\/li>\r\n        <li>Sales quotation and customer approval file.<\/li>\r\n      <\/ul>\r\n    <\/div>\r\n\r\n    <div class=\"cn-cta\">\r\n      <div class=\"cn-cta-title\">Need to check OEM SPD label wording?<\/div>\r\n      <p>\r\n        Send us your target market, label draft, datasheet requirement and packaging plan.\r\n        We can help review whether Uc, MCOV, voltage rating and documentation wording are aligned before production.\r\n      <\/p>\r\n      <a class=\"cn-btn leeyee-site-popup-btn\" href=\"javascript:void(0);\">\r\n        <span>Check OEM Label and Datasheet Consistency<\/span>\r\n      <\/a>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"mistakes\">\r\n    <h2><span class=\"ez-toc-section\" id=\"common-oem-documentation-mistakes\"><\/span>Common OEM Documentation Mistakes<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <h3>Mistake 1: Treating Uc and MCOV as simple translation words<\/h3>\r\n    <p>\r\n      They have a similar technical role, but the label wording should follow the target market and evidence file.\r\n      Do not replace Uc with MCOV only because a customer asks for a North America-style datasheet.\r\n    <\/p>\r\n\r\n    <h3>Mistake 2: Printing labels before the datasheet is approved<\/h3>\r\n    <p>\r\n      Labels, datasheets and cartons should be approved together.\r\n      If labels are printed first, any later technical change may create waste or inconsistent documentation.\r\n    <\/p>\r\n\r\n    <h3>Mistake 3: Using MCOV wording to imply certification<\/h3>\r\n    <p>\r\n      MCOV wording does not prove UL listing.\r\n      Certification claims must be supported by the relevant approval file and allowed marking.\r\n    <\/p>\r\n\r\n    <h3>Mistake 4: Using one datasheet for all markets<\/h3>\r\n    <p>\r\n      Different markets may require different wording, language, rating presentation and approval references.\r\n      A single generic datasheet may not be suitable for every OEM customer.\r\n    <\/p>\r\n\r\n    <h3>Mistake 5: Forgetting the model code<\/h3>\r\n    <p>\r\n      If the model code includes a voltage value, it should be checked against the label, datasheet and packaging.\r\n      Otherwise the same product may appear as different ratings in different documents.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section id=\"faq\">\r\n    <h2><span class=\"ez-toc-section\" id=\"faq-spd-uc-vs-mcov-for-oem-labels-and-datasheets\"><\/span>FAQ: SPD Uc vs MCOV for OEM Labels and Datasheets<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <div class=\"cn-faq\">\r\n      <details open>\r\n        <summary>Is Uc the same as MCOV in an SPD datasheet?<\/summary>\r\n        <div class=\"cn-faq-body\">\r\n          <p>\r\n            Uc and MCOV serve a similar selection role because both relate to the maximum continuous voltage that an SPD can withstand.\r\n            However, they belong to different documentation habits and approval systems, so OEM labels and datasheets should not replace one term with the other casually.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Should an OEM SPD label show Uc or MCOV?<\/summary>\r\n        <div class=\"cn-faq-body\">\r\n          <p>\r\n            It depends on the target market and the documentation route.\r\n            IEC-style markets commonly use Uc, while UL 1449-style documents commonly use MCOV.\r\n            The product label, datasheet, packaging and technical file should follow the same wording and evidence.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Does MCOV wording mean the SPD is UL listed?<\/summary>\r\n        <div class=\"cn-faq-body\">\r\n          <p>\r\n            No.\r\n            Showing MCOV wording does not mean the SPD is automatically UL listed or UL approved.\r\n            Certification status must be confirmed separately through the official listing, approval document or test file.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Can one OEM SPD datasheet show both Uc and MCOV?<\/summary>\r\n        <div class=\"cn-faq-body\">\r\n          <p>\r\n            It may be possible only when the supplier has a clear documentation strategy and the ratings are supported by the product design and evidence file.\r\n            Buyers should avoid adding both terms simply for marketing, especially when the approval route is not confirmed.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>What should match before printing an OEM SPD label?<\/summary>\r\n        <div class=\"cn-faq-body\">\r\n          <p>\r\n            The product label should match the datasheet, model code, packaging, instruction sheet, test report, certification claim and sales quotation.\r\n            Any mismatch can create confusion during customs clearance, project approval or after-sales support.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Can I translate Uc into MCOV for a private label SPD?<\/summary>\r\n        <div class=\"cn-faq-body\">\r\n          <p>\r\n            Do not translate Uc into MCOV without checking the target market, applicable standard, product file and supplier confirmation.\r\n            The two terms have a similar function, but the label wording must match the documentation and market requirement.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>What information should OEM buyers send before confirming Uc or MCOV wording?<\/summary>\r\n        <div class=\"cn-faq-body\">\r\n          <p>\r\n            Send the target market, required standard or certification, expected label format, datasheet template, model code plan, packaging language, voltage rating requirement and any customer approval document.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"cn-related cn-uc-cluster\">\r\n    <h2><span class=\"ez-toc-section\" id=\"related-spd-uc-mcov-guides\"><\/span>Related SPD Uc \/ MCOV Guides<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      This article is part of our SPD Uc and MCOV guide series.\r\n      Use the guides below to compare cross-market terminology, voltage selection, calculation logic, common ratings, and country-related power system differences.\r\n    <\/p>\r\n\r\n    <ul>\r\n      <li>\r\n        <a href=\"https:\/\/www.cnspd.com\/spd-uc-mcov-selection-across-markets\/\" target=\"_blank\" rel=\"noopener\">\r\n          SPD Uc and MCOV Selection Across IEC, UL and Export Markets\r\n        <\/a>\r\n        <br>\r\n        <span>\r\n          A full overview of why Uc and MCOV ratings vary across IEC-style, UL-style, GB\/T-style and export markets.\r\n        <\/span>\r\n      <\/li>\r\n\r\n      <li>\r\n        <a href=\"https:\/\/www.cnspd.com\/spd-uc-selection-guide\/\" target=\"_blank\" rel=\"noopener\">\r\n          SPD Uc Selection Guide for Distribution Boards and OEM Orders\r\n        <\/a>\r\n        <br>\r\n        <span>\r\n          A practical guide for choosing 275V, 320V, 385V or 440V AC SPD options for panels and OEM orders.\r\n        <\/span>\r\n      <\/li>\r\n\r\n      <li>\r\n        <a href=\"https:\/\/www.cnspd.com\/spd-uc-calculation-tn-tt-it\/\" target=\"_blank\" rel=\"noopener\">\r\n          SPD Uc Calculation for TN, TT, IT and Split-Phase Systems\r\n        <\/a>\r\n        <br>\r\n        <span>\r\n          A calculation-focused guide for checking SPD Uc against earthing systems, connection modes and system voltage.\r\n        <\/span>\r\n      <\/li>\r\n\r\n      <li>\r\n        <a href=\"https:\/\/www.cnspd.com\/common-spd-uc-mcov-ratings\/\" target=\"_blank\" rel=\"noopener\">\r\n          Common SPD Uc and MCOV Ratings: 150V, 275V, 320V, 385V, 440V and 480V\r\n        <\/a>\r\n        <br>\r\n        <span>\r\n          A catalogue-style explanation of common Uc and MCOV rating values and where buyers often see them.\r\n        <\/span>\r\n      <\/li>\r\n\r\n      <li>\r\n        <a href=\"https:\/\/www.cnspd.com\/spd-uc-mcov-ratings-by-country\/\" target=\"_blank\" rel=\"noopener\">\r\n          Why SPD Uc and MCOV Ratings Vary by Country and Power System\r\n        <\/a>\r\n        <br>\r\n        <span>\r\n          A market-focused guide explaining why common SPD voltage ratings differ between regions, grid systems and project requirements.\r\n        <\/span>\r\n      <\/li>\r\n    <\/ul>\r\n  <\/section>\r\n\r\n<\/article>\r\n\r\n<script>\r\n  document.addEventListener('DOMContentLoaded', function () {\r\n    document.querySelectorAll('.leeyee-site-popup-btn').forEach(function (btn) {\r\n      btn.addEventListener('click', function (e) {\r\n        e.preventDefault();\r\n        var trigger = document.querySelector('.w-popup.ush_popup_1 .w-popup-trigger');\r\n        if (trigger) {\r\n          trigger.click();\r\n        } else {\r\n          window.open('https:\/\/www.cnspd.com\/contact\/', '_blank');\r\n        }\r\n      });\r\n    });\r\n  });\r\n<\/script>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@graph\": [\r\n    {\r\n      \"@type\": \"Article\",\r\n      \"headline\": \"SPD Uc vs MCOV: Difference for OEM Labels and Datasheets\",\r\n      \"description\": \"Understand when OEM SPD labels and datasheets should use Uc or MCOV. 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This guide explains how to align the wording on SPD labels, datasheets, packaging and test files before private label production.For OEM buyers For private label SPD orders Uc vs MCOV wording&#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-29662","post","type-post","status-publish","format-standard","hentry","category-news","category-surge-protection","category-industry-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SPD Uc vs MCOV: Difference for OEM Labels and Datasheets<\/title>\n<meta name=\"description\" content=\"Understand when OEM SPD labels and datasheets should use Uc or MCOV. Learn how to align surge protector markings, datasheets, packaging and test documents across IEC and UL-style markets.\" \/>\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\/it\/spd-uc-vs-mcov-oem-labels\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SPD Uc vs MCOV: Difference for OEM Labels and Datasheets\" \/>\n<meta property=\"og:description\" content=\"Understand when OEM SPD labels and datasheets should use Uc or MCOV. Learn how to align surge protector markings, datasheets, packaging and test documents across IEC and UL-style markets.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cnspd.com\/it\/spd-uc-vs-mcov-oem-labels\/\" \/>\n<meta property=\"og:site_name\" content=\"Surge Protector, Surge Arrestor, Isolating Switch - LEEYEE\" \/>\n<meta property=\"article:published_time\" content=\"2026-06-30T07:16:37+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-01T03:08:29+00:00\" \/>\n<meta name=\"author\" content=\"Devin Ling\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Scritto da\" \/>\n\t<meta name=\"twitter:data1\" content=\"Devin Ling\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo di lettura stimato\" \/>\n\t<meta name=\"twitter:data2\" content=\"9 minuti\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-uc-vs-mcov-oem-labels\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-uc-vs-mcov-oem-labels\\\/\"},\"author\":{\"name\":\"Devin Ling\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#\\\/schema\\\/person\\\/f49dbafe62c5b47100ad2d9f88af92d3\"},\"headline\":\"SPD Uc vs MCOV: Difference for OEM Labels and Datasheets\",\"datePublished\":\"2026-06-30T07:16:37+00:00\",\"dateModified\":\"2026-07-01T03:08:29+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-uc-vs-mcov-oem-labels\\\/\"},\"wordCount\":1834,\"articleSection\":[\"News\",\"Surge Protection\",\"Technical Guides\"],\"inLanguage\":\"it-IT\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/spd-uc-vs-mcov-oem-labels\\\/\",\"url\":\"https:\\\/\\\/www.cnspd.com\\\/spd-uc-vs-mcov-oem-labels\\\/\",\"name\":\"SPD Uc vs MCOV: Difference for OEM Labels and Datasheets\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#website\"},\"datePublished\":\"2026-06-30T07:16:37+00:00\",\"dateModified\":\"2026-07-01T03:08:29+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#\\\/schema\\\/person\\\/f49dbafe62c5b47100ad2d9f88af92d3\"},\"description\":\"Understand when OEM SPD labels and datasheets should use Uc or MCOV. 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