{"product_id":"littelfuse-jls600-class-j-fuse-600a-600v-fast-acting-current-limiting-fuse","title":"Littelfuse JLS600 Class J Fuse – 600A – 600V Fast-Acting Current-Limiting Fuse","description":"\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a11c9d2-fa5c-83e8-934f-b46429aa1619-14\" 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-b46429aa1619-14\" data-turn-id-container=\"request-6a11c9d2-fa5c-83e8-934f-b46429aa1619-14\" data-testid=\"conversation-turn-384\" 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=\"eaa461ac-511a-41bf-b680-14e012da2936\" 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=\"105\" data-end=\"600\"\u003eThe Littelfuse JLS600 is a 600 Amp Class J fast-acting fuse engineered for high-capacity circuit protection in industrial and commercial electrical distribution systems. Part of the JLS series, this current-limiting fuse provides rapid fault interruption to minimize let-through energy and protect equipment from damaging short-circuit currents. Its compact knife-blade construction allows for efficient installation while delivering exceptional interrupting performance and reliable protection.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1judnlb\" data-start=\"607\" data-end=\"628\"\u003eElectrical Rating\u003c\/h3\u003e\n\u003cul data-start=\"629\" data-end=\"731\"\u003e\n\u003cli data-section-id=\"1ojqtut\" data-start=\"629\" data-end=\"657\"\u003eCurrent Rating: 600 Amps\u003c\/li\u003e\n\u003cli data-section-id=\"1s2lsbc\" data-start=\"658\" data-end=\"689\"\u003eMaximum AC Voltage: 600 VAC\u003c\/li\u003e\n\u003cli data-section-id=\"wa7brc\" data-start=\"690\" data-end=\"731\"\u003eInterrupting Rating: 200 kA @ 600 VAC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"uvdx3z\" data-start=\"738\" data-end=\"760\"\u003eKey Specifications\u003c\/h3\u003e\n\u003cul data-start=\"761\" data-end=\"954\"\u003e\n\u003cli data-section-id=\"15ezalo\" data-start=\"761\" data-end=\"789\"\u003eManufacturer: Littelfuse\u003c\/li\u003e\n\u003cli data-section-id=\"173qeox\" data-start=\"790\" data-end=\"816\"\u003eCatalog Number: JLS600\u003c\/li\u003e\n\u003cli data-section-id=\"8ics1o\" data-start=\"817\" data-end=\"832\"\u003eSeries: JLS\u003c\/li\u003e\n\u003cli data-section-id=\"1uncs7x\" data-start=\"833\" data-end=\"856\"\u003eFuse Class: Class J\u003c\/li\u003e\n\u003cli data-section-id=\"soa6gr\" data-start=\"857\" data-end=\"891\"\u003eConstruction Type: Knife-Blade\u003c\/li\u003e\n\u003cli data-section-id=\"12nf2bp\" data-start=\"892\" data-end=\"935\"\u003eFuse Type: Fast-Acting Current-Limiting\u003c\/li\u003e\n\u003cli data-section-id=\"q4hlgv\" data-start=\"936\" data-end=\"954\"\u003eIndicating: No\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"krhh0r\" data-start=\"961\" data-end=\"991\"\u003eProtection Characteristics\u003c\/h3\u003e\n\u003cul data-start=\"992\" data-end=\"1319\"\u003e\n\u003cli data-section-id=\"sy3zvj\" data-start=\"992\" data-end=\"1046\"\u003eFast-acting operation for immediate fault clearing\u003c\/li\u003e\n\u003cli data-section-id=\"op2vll\" data-start=\"1047\" data-end=\"1119\"\u003eCurrent-limiting design reduces let-through current and fault energy\u003c\/li\u003e\n\u003cli data-section-id=\"1va1tnh\" data-start=\"1120\" data-end=\"1169\"\u003eProvides exceptional short-circuit protection\u003c\/li\u003e\n\u003cli data-section-id=\"vgaczr\" data-start=\"1170\" data-end=\"1239\"\u003eHigh interrupting capacity for demanding industrial power systems\u003c\/li\u003e\n\u003cli data-section-id=\"1vo7u0p\" data-start=\"1240\" data-end=\"1319\"\u003eHelps protect electrical and electronic equipment from fault-related damage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"xldzoc\" data-start=\"1326\" data-end=\"1351\"\u003eConstruction Features\u003c\/h3\u003e\n\u003cul data-start=\"1352\" data-end=\"1525\"\u003e\n\u003cli data-section-id=\"4ahhy4\" data-start=\"1352\" data-end=\"1383\"\u003eCompact Class J fuse design\u003c\/li\u003e\n\u003cli data-section-id=\"51zcjh\" data-start=\"1384\" data-end=\"1421\"\u003eKnife-blade terminal construction\u003c\/li\u003e\n\u003cli data-section-id=\"1lrgeqr\" data-start=\"1422\" data-end=\"1459\"\u003eNon-indicating fuse configuration\u003c\/li\u003e\n\u003cli data-section-id=\"1reydx8\" data-start=\"1460\" data-end=\"1525\"\u003eIndustrial-duty construction for reliable long-term operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1dp59sz\" data-start=\"1532\" data-end=\"1560\"\u003eMounting \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cul data-start=\"1561\" data-end=\"1772\"\u003e\n\u003cli data-section-id=\"o14hrv\" data-start=\"1561\" data-end=\"1601\"\u003eMounting Method: Fuse Block \/ Holder\u003c\/li\u003e\n\u003cli data-section-id=\"1444ocp\" data-start=\"1602\" data-end=\"1667\"\u003eCompatible with standard Class J fuse holders and fuse blocks\u003c\/li\u003e\n\u003cli data-section-id=\"18r6j0i\" data-start=\"1668\" data-end=\"1772\"\u003eSuitable for switchboards, panelboards, motor control centers, and industrial distribution equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"wggvqn\" data-start=\"1779\" data-end=\"1795\"\u003eApplications\u003c\/h3\u003e\n\u003cul data-start=\"1796\" data-end=\"2040\"\u003e\n\u003cli data-section-id=\"n7lx3w\" data-start=\"1796\" data-end=\"1837\"\u003eIndustrial power distribution systems\u003c\/li\u003e\n\u003cli data-section-id=\"x5ewh3\" data-start=\"1838\" data-end=\"1870\"\u003eSwitchboards and panelboards\u003c\/li\u003e\n\u003cli data-section-id=\"1n6q63g\" data-start=\"1871\" data-end=\"1896\"\u003eMotor control centers\u003c\/li\u003e\n\u003cli data-section-id=\"1whrcuq\" data-start=\"1897\" data-end=\"1937\"\u003eBranch and feeder circuit protection\u003c\/li\u003e\n\u003cli data-section-id=\"1h5vztv\" data-start=\"1938\" data-end=\"1987\"\u003eIndustrial machinery and equipment protection\u003c\/li\u003e\n\u003cli data-section-id=\"1uy8e8\" data-start=\"1988\" data-end=\"2040\"\u003eCurrent-limiting circuit protection applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1aljov1\" data-start=\"2047\" data-end=\"2063\"\u003eProduct Data\u003c\/h3\u003e\n\u003cul data-start=\"2064\" data-end=\"2211\"\u003e\n\u003cli data-section-id=\"15ezalo\" data-start=\"2064\" data-end=\"2092\"\u003eManufacturer: Littelfuse\u003c\/li\u003e\n\u003cli data-section-id=\"173qeox\" data-start=\"2093\" data-end=\"2119\"\u003eCatalog Number: JLS600\u003c\/li\u003e\n\u003cli data-section-id=\"1qz3a0e\" data-start=\"2120\" data-end=\"2171\"\u003eProduct Type: Fast-Acting Current-Limiting Fuse\u003c\/li\u003e\n\u003cli data-section-id=\"8ics1o\" data-start=\"2172\" data-end=\"2187\"\u003eSeries: JLS\u003c\/li\u003e\n\u003cli data-section-id=\"1uncs7x\" data-start=\"2188\" data-end=\"2211\"\u003eFuse Class: Class J\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":48476674294009,"sku":"JLS600","price":352.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/7810\/7385\/files\/1280_MrM7tDgHIZL38IWl_46de7ad8-0064-40d7-a093-943ff8ee8610.jpg?v=1780411380","url":"https:\/\/mycircuitbreakers.com\/products\/littelfuse-jls600-class-j-fuse-600a-600v-fast-acting-current-limiting-fuse","provider":"My Circuit Breakers","version":"1.0","type":"link"}