{"id":53,"date":"2009-04-08T20:53:53","date_gmt":"2009-04-08T19:53:53","guid":{"rendered":"http:\/\/www.ibexuk.com\/resource\/?p=53"},"modified":"2022-02-18T15:05:18","modified_gmt":"2022-02-18T15:05:18","slug":"european-vs-american-fuse-standards","status":"publish","type":"post","link":"https:\/\/ibex.tech\/resources\/geek-area\/electronics\/fuses\/european-vs-american-fuse-standards","title":{"rendered":"European vs American Fuse Standards"},"content":{"rendered":"<p>One interesting difference between UL and IEC standards for fuses is that American UL standards often state a requirement for a fuse to withstand 100% or 110% rated current for a minimum of 4 hours. This means that the fuse is allowed to fail after 4 hours at its rated current.<\/p>\n<p>In effect this means that when selecting a UL certified fuse you need to bear in mind that you should not continuously load it above around 75% capacity to ensure long term reliability. In contrast European IEC standards tend to require a fuse to withstand 100% rated current at room temperature indefinitely. This is one of those historical important points that is often unknown to engineers as they no longer tend to open up a fuse manufacturer catalog and see important information like this in the front, but instead search directly to fuse data sheets on the web where this 100% load issue is typically not made clear.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>One interesting difference between UL and IEC standards for fuses is that American UL standards often state a requirement for a fuse to withstand 100% or 110% rated current for a minimum of 4 hours. This means that the fuse is allowed to fail after 4 hours at its rated current. In effect this means [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-53","post","type-post","status-publish","format-standard","hentry","category-fuses"],"_links":{"self":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/53","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/comments?post=53"}],"version-history":[{"count":1,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/53\/revisions"}],"predecessor-version":[{"id":1630,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/53\/revisions\/1630"}],"wp:attachment":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/media?parent=53"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/categories?post=53"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/tags?post=53"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}