{"product_id":"llnrk350","title":"LLNRK350 - 350Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eLLNRK350 - 350Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen you're protecting a 350 Amp electrical circuit, there's little room for guesswork. You need a fuse that can handle normal operating demands, tolerate temporary startup surges, and respond effectively when an actual electrical fault occurs. That's where the Littelfuse LLNRK350 earns its place.\u003c\/p\u003e\n\u003cp\u003eAnother advantage that can matter over years of operation is low electrical resistance. By reducing resistance-related power losses, the POWR-PRO design helps support efficient system operation.\u003c\/p\u003e\n\u003cp\u003eWith a 350A continuous current rating, 250V AC maximum voltage, and 125V DC maximum voltage, the LLNRK350 is designed for demanding commercial and industrial applications. It also offers an upgrade path for certain existing Class H fuse block installations, subject to equipment compatibility and applicable electrical requirements.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features and Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e350 Amp continuous current rating for appropriately sized electrical circuits\u003c\/li\u003e\n\u003cli\u003eClass RK1 current-limiting design helps reduce short-circuit damage.\u003c\/li\u003e\n\u003cli\u003eDual-element construction provides dependable time-delay operation.\u003c\/li\u003e\n\u003cli\u003eSpring-loaded thermal overload element helps minimize nuisance openings.\u003c\/li\u003e\n\u003cli\u003eAccommodates temporary inrush currents from motors and transformers\u003c\/li\u003e\n\u003cli\u003eHigh AC interrupting capacity for demanding electrical applications\u003c\/li\u003e\n\u003cli\u003eLow-resistance construction helps reduce power consumption.\u003c\/li\u003e\n\u003cli\u003eSuitable for service entrance, main, feeder, and general-purpose branch circuits\u003c\/li\u003e\n\u003cli\u003eNon-indicating design for standard fuse protection applications\u003c\/li\u003e\n\u003cli\u003eSupports upgrades from certain Class H fuses in compatible existing fuse blocks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Littelfuse\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalog Number:\u003c\/strong\u003e LLNRK350\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e LLNRK\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Family:\u003c\/strong\u003e POWR-PRO\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Class:\u003c\/strong\u003e Class RK1\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Type:\u003c\/strong\u003e Dual-Element, Time-Delay\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Current Rating:\u003c\/strong\u003e 350 Amps\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum AC Voltage:\u003c\/strong\u003e 250V AC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum DC Voltage:\u003c\/strong\u003e 125V DC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC Interrupting Ratings:\u003c\/strong\u003e 200,000A and 300,000A at 250V AC, as listed by Littelfuse\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC Interrupting Rating:\u003c\/strong\u003e 20,000A at 125V DC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpening Characteristic:\u003c\/strong\u003e Slo-Blo \/ Time Lag \/ Time Delay\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent-Limiting:\u003c\/strong\u003e Yes\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverload Element:\u003c\/strong\u003e Thermally Reversible, Spring-Loaded\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicating:\u003c\/strong\u003e No\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Method:\u003c\/strong\u003e Fuse Block \/ Clip \/ Holder\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecified Holder Series:\u003c\/strong\u003e LFR25400\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass H Fuse Block Compatibility:\u003c\/strong\u003e Permitted for certain existing installations when equipment ratings and compatibility requirements are satisfied\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial Compliance and Certifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Littelfuse LLNRK350 belongs to the POWR-PRO Class RK1 fuse family and is designed for current-limiting overload and short-circuit protection.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRoHS Compliance: Verify against current Littelfuse material compliance documentation\u003c\/li\u003e\n\u003cli\u003eREACH Compliance: Verify against current Littelfuse material compliance documentation\u003c\/li\u003e\n\u003cli\u003eUL and CSA Certifications: Confirm applicable listings and approvals using current manufacturer documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor projects requiring specific regulatory approvals, material declarations, or certification records, verify the latest manufacturer information before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere It Works Best\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eService Entrance Electrical Equipment\u003c\/li\u003e\n\u003cli\u003eMain Power Distribution Circuits\u003c\/li\u003e\n\u003cli\u003eIndustrial Feeder Circuits\u003c\/li\u003e\n\u003cli\u003eGeneral-Purpose Branch Circuits\u003c\/li\u003e\n\u003cli\u003eMotor Circuits with High Starting Currents\u003c\/li\u003e\n\u003cli\u003eTransformer Protection Applications\u003c\/li\u003e\n\u003cli\u003eSolenoids and Electromagnetic Equipment\u003c\/li\u003e\n\u003cli\u003eFluorescent Lighting Circuits\u003c\/li\u003e\n\u003cli\u003eIndustrial Machinery and Equipment\u003c\/li\u003e\n\u003cli\u003eCommercial Electrical Distribution Systems\u003c\/li\u003e\n\u003cli\u003eElectrical Components with Temporary Inrush Currents\u003c\/li\u003e\n\u003cli\u003eCompatible Class H Fuse Block Upgrade Applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\n\u003cdiv\u003e\n\u003cblockquote\u003e\n\u003cp style=\"font-size: 12px;\"\u003e\u003cem\u003eUse of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer.\u003cstrong\u003e CIRCUIT BREAKER SUPERSTORE®\u003c\/strong\u003e is an independent reseller and is \u003cstrong\u003enot \u003c\/strong\u003ean authorized distributor, affiliate, or representative of any manufacturer. Manufacturer warranties do \u003cstrong\u003enot\u003c\/strong\u003e apply unless expressly stated. All trademarks and registered trademarks are the property of their respective owners.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 12px;\"\u003e\u003cem\u003eLittelfuse® is a registered trademark of Littelfuse, Inc. Products sold are surplus, used, or refurbished and are \u003cstrong\u003eNOT \u003c\/strong\u003esupplied by Littelfuse, Inc. or its affiliates.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Littelfuse","offers":[{"title":"New In Box","offer_id":50459264647467,"sku":"LLNRK350","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459264680235,"sku":"LLNRK350  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/llnrk350","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}