{"product_id":"littelfuse-jlln800-class-t-fuse-800a-300v-fast-acting-current-limiting-fuse","title":"Littelfuse JLLN800 Class T Fuse – 800A – 300V Fast-Acting Current-Limiting Fuse","description":"\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a11c9d2-fa5c-83e8-934f-b46429aa1619-5\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6a11c9d2-fa5c-83e8-934f-b46429aa1619-5\" data-turn-id-container=\"request-6a11c9d2-fa5c-83e8-934f-b46429aa1619-5\" data-testid=\"conversation-turn-366\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"41602603-4436-409c-b276-921fef1a756b\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full dark markdown-new-styling\"\u003e\n\u003cp data-start=\"106\" data-end=\"578\"\u003eThe Littelfuse JLLN800 is a 800 Amp Class T fast-acting fuse designed for high-capacity industrial and commercial electrical distribution systems. Part of the JLLN series, this current-limiting fuse provides rapid fault clearing to minimize equipment damage and reduce let-through energy during short-circuit events. Its compact knife-blade\/bolt-in construction offers a space-saving solution while delivering reliable protection for critical power distribution equipment.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1judnlb\" data-start=\"585\" data-end=\"606\"\u003eElectrical Rating\u003c\/h3\u003e\n\u003cul data-start=\"607\" data-end=\"765\"\u003e\n\u003cli data-section-id=\"1khni0b\" data-start=\"607\" data-end=\"635\"\u003eCurrent Rating: 800 Amps\u003c\/li\u003e\n\u003cli data-section-id=\"1r9g6xp\" data-start=\"636\" data-end=\"667\"\u003eMaximum AC Voltage: 300 VAC\u003c\/li\u003e\n\u003cli data-section-id=\"1bhmmrc\" data-start=\"668\" data-end=\"699\"\u003eMaximum DC Voltage: 125 VDC\u003c\/li\u003e\n\u003cli data-section-id=\"1hyb0lc\" data-start=\"700\" data-end=\"765\"\u003eInterrupting Rating:\n\u003cul data-start=\"727\" data-end=\"765\"\u003e\n\u003cli data-section-id=\"5nvs4y\" data-start=\"727\" data-end=\"740\"\u003e200 kA AC\u003c\/li\u003e\n\u003cli data-section-id=\"oebnhc\" data-start=\"743\" data-end=\"765\"\u003e20 kA DC @ 125 VDC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"uvdx3z\" data-start=\"772\" data-end=\"794\"\u003eKey Specifications\u003c\/h3\u003e\n\u003cul data-start=\"795\" data-end=\"1000\"\u003e\n\u003cli data-section-id=\"15ezalo\" data-start=\"795\" data-end=\"823\"\u003eManufacturer: Littelfuse\u003c\/li\u003e\n\u003cli data-section-id=\"1lbn6n2\" data-start=\"824\" data-end=\"851\"\u003eCatalog Number: JLLN800\u003c\/li\u003e\n\u003cli data-section-id=\"1vptq8d\" data-start=\"852\" data-end=\"868\"\u003eSeries: JLLN\u003c\/li\u003e\n\u003cli data-section-id=\"1unc6df\" data-start=\"869\" data-end=\"892\"\u003eFuse Class: Class T\u003c\/li\u003e\n\u003cli data-section-id=\"10wxn8r\" data-start=\"893\" data-end=\"937\"\u003eConstruction Type: Knife-Blade \/ Bolt-In\u003c\/li\u003e\n\u003cli data-section-id=\"12nf2bp\" data-start=\"938\" data-end=\"981\"\u003eFuse Type: Fast-Acting Current-Limiting\u003c\/li\u003e\n\u003cli data-section-id=\"q4hlgv\" data-start=\"982\" data-end=\"1000\"\u003eIndicating: No\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"krhh0r\" data-start=\"1007\" data-end=\"1037\"\u003eProtection Characteristics\u003c\/h3\u003e\n\u003cul data-start=\"1038\" data-end=\"1377\"\u003e\n\u003cli data-section-id=\"1a3lwdy\" data-start=\"1038\" data-end=\"1092\"\u003eFast-acting operation for rapid fault interruption\u003c\/li\u003e\n\u003cli data-section-id=\"i177h4\" data-start=\"1093\" data-end=\"1171\"\u003eCurrent-limiting design reduces let-through energy during fault conditions\u003c\/li\u003e\n\u003cli data-section-id=\"hxzu42\" data-start=\"1172\" data-end=\"1218\"\u003eProvides superior short-circuit protection\u003c\/li\u003e\n\u003cli data-section-id=\"izmi05\" data-start=\"1219\" data-end=\"1295\"\u003eHigh interrupting capacity for demanding power distribution applications\u003c\/li\u003e\n\u003cli data-section-id=\"1hvhe5z\" data-start=\"1296\" data-end=\"1377\"\u003eHelps protect sensitive electrical and electronic equipment from fault damage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"xldzoc\" data-start=\"1384\" data-end=\"1409\"\u003eConstruction Features\u003c\/h3\u003e\n\u003cul data-start=\"1410\" data-end=\"1592\"\u003e\n\u003cli data-section-id=\"1ywu2gy\" data-start=\"1410\" data-end=\"1441\"\u003eCompact Class T fuse design\u003c\/li\u003e\n\u003cli data-section-id=\"166gte5\" data-start=\"1442\" data-end=\"1487\"\u003eKnife-blade\/bolt-in terminal construction\u003c\/li\u003e\n\u003cli data-section-id=\"1lrgeqr\" data-start=\"1488\" data-end=\"1525\"\u003eNon-indicating fuse configuration\u003c\/li\u003e\n\u003cli data-section-id=\"1edz7wy\" data-start=\"1526\" data-end=\"1592\"\u003eRugged industrial-duty construction for dependable performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1dp59sz\" data-start=\"1599\" data-end=\"1627\"\u003eMounting \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cul data-start=\"1628\" data-end=\"1856\"\u003e\n\u003cli data-section-id=\"scj4g6\" data-start=\"1628\" data-end=\"1687\"\u003eMounting Method: Fuse Block \/ Holder \/ Bolt-In Mounting\u003c\/li\u003e\n\u003cli data-section-id=\"1clzk5o\" data-start=\"1688\" data-end=\"1744\"\u003eCompatible with Class T fuse blocks and fuse holders\u003c\/li\u003e\n\u003cli data-section-id=\"fz17dt\" data-start=\"1745\" data-end=\"1856\"\u003eSuitable for switchboards, panelboards, UPS systems, battery systems, and industrial distribution equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"wggvqn\" data-start=\"1863\" data-end=\"1879\"\u003eApplications\u003c\/h3\u003e\n\u003cul data-start=\"1880\" data-end=\"2137\"\u003e\n\u003cli data-section-id=\"n7lx3w\" data-start=\"1880\" data-end=\"1921\"\u003eIndustrial power distribution systems\u003c\/li\u003e\n\u003cli data-section-id=\"z4icg\" data-start=\"1922\" data-end=\"1956\"\u003eUPS and battery backup systems\u003c\/li\u003e\n\u003cli data-section-id=\"x5ewh3\" data-start=\"1957\" data-end=\"1989\"\u003eSwitchboards and panelboards\u003c\/li\u003e\n\u003cli data-section-id=\"1n6q63g\" data-start=\"1990\" data-end=\"2015\"\u003eMotor control centers\u003c\/li\u003e\n\u003cli data-section-id=\"11fbwcj\" data-start=\"2016\" data-end=\"2073\"\u003eCurrent-limiting feeder and branch circuit protection\u003c\/li\u003e\n\u003cli data-section-id=\"iray4j\" data-start=\"2074\" data-end=\"2137\"\u003eProtection of sensitive electrical and electronic equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1aljov1\" data-start=\"2144\" data-end=\"2160\"\u003eProduct Data\u003c\/h3\u003e\n\u003cul data-start=\"2161\" data-end=\"2310\"\u003e\n\u003cli data-section-id=\"15ezalo\" data-start=\"2161\" data-end=\"2189\"\u003eManufacturer: Littelfuse\u003c\/li\u003e\n\u003cli data-section-id=\"1lbn6n2\" data-start=\"2190\" data-end=\"2217\"\u003eCatalog Number: JLLN800\u003c\/li\u003e\n\u003cli data-section-id=\"1qz3a0e\" data-start=\"2218\" data-end=\"2269\"\u003eProduct Type: Fast-Acting Current-Limiting Fuse\u003c\/li\u003e\n\u003cli data-section-id=\"1vptq8d\" data-start=\"2270\" data-end=\"2286\"\u003eSeries: JLLN\u003c\/li\u003e\n\u003cli data-section-id=\"1unc6df\" data-start=\"2287\" data-end=\"2310\"\u003eFuse Class: Class T\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Littelfuse","offers":[{"title":"NEW","offer_id":48476356018425,"sku":"JLLN800","price":229.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/7810\/7385\/files\/1280_oPLAlynZ6J21IT3v.jpg?v=1780409172","url":"https:\/\/mycircuitbreakers.com\/products\/littelfuse-jlln800-class-t-fuse-800a-300v-fast-acting-current-limiting-fuse","provider":"My Circuit Breakers","version":"1.0","type":"link"}