{"id":5841,"date":"2026-06-27T13:57:39","date_gmt":"2026-06-27T05:57:39","guid":{"rendered":"https:\/\/www.yroele.com\/?post_type=blog&#038;p=5841"},"modified":"2026-06-27T13:57:39","modified_gmt":"2026-06-27T05:57:39","slug":"why-do-circuit-breakers-with-the-same-rated-current-have-such-a-big-price-difference","status":"publish","type":"blog","link":"https:\/\/www.yroele.com\/vi\/news\/why-do-circuit-breakers-with-the-same-rated-current-have-such-a-big-price-difference","title":{"rendered":"Why Do Circuit Breakers with the Same Rated Current Have Such a Big Price Difference?"},"content":{"rendered":"<p>Many procurement professionals notice a common phenomenon when comparing <strong>circuit breaker prices<\/strong> online:<a href=\"https:\/\/www.yroele.com\/vi\/circuit-breaker\/\" target=\"_blank\" rel=\"noopener\"> b\u1ed9 ng\u1eaft m\u1ea1ch<\/a> labeled 32A, 63A, or 125A are sometimes sold for only a few dollars, while others cost several times more.<\/p>\n<p>This price difference is not coincidental. It is caused by a combination of multiple factors. Next, we will analyze why circuit breakers with the same rated current can have such large price gaps.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Chuy\u1ec3n \u0111\u1ed5i m\u1ee5c l\u1ee5c\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Chuy\u1ec3n \u0111\u1ed5i<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/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=\"https:\/\/www.yroele.com\/vi\/news\/why-do-circuit-breakers-with-the-same-rated-current-have-such-a-big-price-difference\/#Rated_Current_Is_Just_One_of_Many_Parameters\" >Rated Current Is Just One of Many Parameters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.yroele.com\/vi\/news\/why-do-circuit-breakers-with-the-same-rated-current-have-such-a-big-price-difference\/#Certification_Compliance_and_Brand_Infrastructure\" >Certification, Compliance, and Brand Infrastructure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.yroele.com\/vi\/news\/why-do-circuit-breakers-with-the-same-rated-current-have-such-a-big-price-difference\/#Internal_Materials_Differ\" >Internal Materials Differ<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.yroele.com\/vi\/news\/why-do-circuit-breakers-with-the-same-rated-current-have-such-a-big-price-difference\/#Breaking_Capacity_Is_Not_the_Same\" >Breaking Capacity Is Not the Same<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.yroele.com\/vi\/news\/why-do-circuit-breakers-with-the-same-rated-current-have-such-a-big-price-difference\/#Product_Consistency\" >Product Consistency<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.yroele.com\/vi\/news\/why-do-circuit-breakers-with-the-same-rated-current-have-such-a-big-price-difference\/#Why_Choose_YRO_Circuit_Breakers\" >Why Choose YRO Circuit Breakers?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.yroele.com\/vi\/news\/why-do-circuit-breakers-with-the-same-rated-current-have-such-a-big-price-difference\/#Conclusion\" >Ph\u1ea7n k\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Rated_Current_Is_Just_One_of_Many_Parameters\"><\/span><strong>Rated Current Is Just One of Many Parameters<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Rated current indicates the continuous current that an\u00a0<strong><b>electrical<\/b><\/strong><strong><b>\u00a0<\/b><\/strong><strong><b>ng\u1eaft m\u1ea1ch<\/b><\/strong>\u00a0can carry under specified conditions for a long period.<\/p>\n<p>International standards (such as IEC 60898-1 and <a href=\"https:\/\/www.tuvsud.com\/en-sg\/services\/product-certification\/iecee-cb-scheme\" target=\"_blank\" rel=\"noopener\">IEC 60947-2<\/a>) not only specify rated current but also require many performance aspects, including:<\/p>\n<ul>\n<li>C\u00f4ng su\u1ea5t \u0111\u1ed9t ph\u00e1<\/li>\n<li>Temperature rise performance<\/li>\n<li>Insulation performance<\/li>\n<li>Mechanical endurance<\/li>\n<li>Electrical endurance<\/li>\n<\/ul>\n<p>Therefore, two circuit breakers both marked 63A may be completely different in other technical performance aspects.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Certification_Compliance_and_Brand_Infrastructure\"><\/span><strong>Certification, Compliance, and Brand Infrastructure<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The cost of compliance is high. <strong><b>E<\/b><\/strong><strong><b>lectrical <\/b><\/strong><strong><b>c<\/b><\/strong><strong><b>ircuit breakers<\/b><\/strong>\u00a0with CCC, CE, UL, or other certifications undergo strict design reviews, type tests, and annual factory audits. Compared to un-certified equipment, multi-country certification can increase engineering and testing costs by <strong><b>30% to 50%<\/b><\/strong>. Special certifications for ships, nuclear power, or chemical industries further increase the price.<\/p>\n<p>Brands such as Schneider Electric, ABB, or Siemens have higher prices because their prices include global quality systems, traceable material records, and a global service network.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Internal_Materials_Differ\"><\/span><strong>Internal Materials Differ<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>What consumers usually see is only the outer casing of the <strong><b>low voltage<\/b><\/strong><strong><b>\u00a0<\/b><\/strong><strong><b>ng\u1eaft m\u1ea1ch<\/b><\/strong>. What truly determines product quality is the internal structure.<\/p>\n<p>Different manufacturers may use different grades of:<\/p>\n<ul>\n<li>Copper conductors<\/li>\n<li>Contact materials<\/li>\n<li>Springs<\/li>\n<li>Arc extinguishing systems<\/li>\n<li>Insulating materials<\/li>\n<li>Engineering plastics<\/li>\n<\/ul>\n<p>Higher-quality raw materials generally mean higher procurement costs, and they may also bring better durability and consistency.<\/p>\n<p>For example:<\/p>\n<p>\u2013 <strong><b>Contact materials<\/b><\/strong>: Low-cost products often use silver-plated copper or even pure copper contacts. While this saves costs, the contacts wear out faster and the risk of contact welding under short-circuit conditions increases significantly. High-quality products use silver-tin-oxide (AgSnO\u2082) or silver-nickel (AgNi) alloys. These materials have low contact resistance, excellent anti-welding properties, and can withstand thousands of operations.<\/p>\n<p>\u2013 <strong><b>Conductors<\/b><\/strong>: Some products use conductors with lower copper content or smaller cross-sectional areas, while high-quality products generally use higher-grade copper conductors.<\/p>\n<p>\u2013 <strong><b>Housing materials<\/b><\/strong>: Ordinary products use standard engineering plastics, while high-quality products use engineering plastics with better flame-retardant properties.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-4840 aligncenter\" src=\"https:\/\/i1.wp.com\/www.yroele.com\/wp-content\/uploads\/2025\/08\/DC-Circuit-Breaker-for-Solar-Industrial-Use-YRL7-DC.webp?quality=85&strip=all\" alt=\"B\u1ed9 ng\u1eaft m\u1ea1ch DC d\u00f9ng trong c\u00f4ng nghi\u1ec7p n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi YRL7 DC\" width=\"800\" height=\"800\" srcset=\"https:\/\/i1.wp.com\/www.yroele.com\/wp-content\/uploads\/2025\/08\/DC-Circuit-Breaker-for-Solar-Industrial-Use-YRL7-DC.webp?quality=85&strip=all 800w, https:\/\/i1.wp.com\/www.yroele.com\/wp-content\/uploads\/2025\/08\/DC-Circuit-Breaker-for-Solar-Industrial-Use-YRL7-DC-300x300.webp?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.yroele.com\/wp-content\/uploads\/2025\/08\/DC-Circuit-Breaker-for-Solar-Industrial-Use-YRL7-DC-150x150.webp?quality=85&strip=all 150w, https:\/\/i1.wp.com\/www.yroele.com\/wp-content\/uploads\/2025\/08\/DC-Circuit-Breaker-for-Solar-Industrial-Use-YRL7-DC-768x768.webp?quality=85&strip=all 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Breaking_Capacity_Is_Not_the_Same\"><\/span><strong>Breaking Capacity Is Not the Same<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>One of the important factors affecting price is breaking capacity.<\/p>\n<p>Breaking capacity indicates the ability of a <a href=\"https:\/\/www.yroele.com\/vi\/circuit-breaker\/\" target=\"_blank\" rel=\"noopener\"><strong><b>low voltage<\/b><\/strong><strong><b>\u00a0<\/b><\/strong><strong><b>ng\u1eaft m\u1ea1ch<\/b><\/strong><\/a>\u00a0to safely interrupt the maximum fault current,\u00a0under specified test conditions.<\/p>\n<p>For example:<\/p>\n<p>One circuit breaker may have a breaking capacity of 6kA, while another may reach 10kA.<\/p>\n<p>Although both have a rated current of 63A, their design capabilities for handling fault currents are different.<\/p>\n<p>Higher breaking capacity generally requires more complex internal structures, stronger arc extinguishing capability, and more product testing, so manufacturing costs increase accordingly.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Product_Consistency\"><\/span><strong>Product Consistency<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>For large-scale projects, having just one sample pass is not enough.<\/p>\n<p>Professional buyers are more concerned about:<\/p>\n<p>Whether 1,000 or 10,000 units of products can maintain stable quality.<\/p>\n<p>To reduce the differences between different batches of products, manufacturers usually invest:<\/p>\n<ul>\n<li>Automated production equipment<\/li>\n<li>Automatic inspection equipment<\/li>\n<li>Calibrated testing instruments<\/li>\n<li>Complete quality management systems<\/li>\n<\/ul>\n<p>These investments will increase the operating costs of the enterprise, but they also help improve the consistency of mass production.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Why_Choose_YRO_Circuit_Breakers\"><\/span><strong>Why Choose YRO Circuit Breakers?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>YRO focuses on manufacturing circuit breakers for <strong><b>global B2B customers<\/b><\/strong>, with a focus on stable production, OEM and ODM customization services, and strict production processes.<\/p>\n<p>Our <a href=\"https:\/\/www.yroele.com\/vi\/circuit-breaker\/\" target=\"_blank\" rel=\"noopener\">b\u1ed9 ng\u1eaft m\u1ea1ch<\/a> are suitable for PV systems and power distribution systems, and we can provide corresponding certification support based on different product models and target markets.<\/p>\n<p>We not only focus on product price, but also place great importance on product consistency, customer service, and flexible customization capabilities. We hope to provide long-term and stable cooperation support for distributors, wholesalers, and engineering customers.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Ph\u1ea7n k\u1ebft lu\u1eadn<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Two <strong><b>MCBs<\/b><\/strong>\u00a0with the same rated current may appear very similar, but they may have significant differences in manufacturing processes, certification status, interrupting capacity, material quality, and factory manufacturing capabilities. These differences are also important reasons for the price variations.<\/p>\n<p>When purchasing circuit breakers, one should not only focus on the rated current or the lowest price, but also consider the technical parameters of the product, compliance with regulations, production consistency, and long-term supply capacity. For long-term use or engineering projects, purchasing based on overall value is usually more meaningful than simply pursuing the lowest price.<\/p>","protected":false},"excerpt":{"rendered":"<p>Many procurement professionals notice a common phenomenon when comparing circuit breaker prices online: circuit breakers labeled 32A, 63A, or 125A are sometimes sold for only a few dollars, while others cost several times more.<\/p>","protected":false},"featured_media":5842,"template":"","meta":{"_acf_changed":false,"footnotes":""},"blog_category":[19,20],"class_list":["post-5841","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-news","blog_category-knowledge"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/blog\/5841","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/types\/blog"}],"version-history":[{"count":1,"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/blog\/5841\/revisions"}],"predecessor-version":[{"id":5843,"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/blog\/5841\/revisions\/5843"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/media\/5842"}],"wp:attachment":[{"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/media?parent=5841"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.yroele.com\/vi\/wp-json\/wp\/v2\/blog_category?post=5841"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}