{"product_id":"llnrk400","title":"LLNRK400 - 400Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eLLNRK400 - 400Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePowerful circuit protection shouldn't mean unnecessary interruptions. When your motors start, transformers energize, or industrial equipment comes online, temporary current surges are often normal. The challenge is protecting the electrical system from genuine faults without opening a fuse every time equipment starts.\u003c\/p\u003e\n\u003cp\u003eThe Littelfuse LLNRK400 400 Amp time-delay fuse is designed to meet that challenge. Part of the Littelfuse POWR-PRO series, this 250V Class RK1 current-limiting fuse combines dual-element construction, high interrupting capacity, and dependable overload protection for demanding commercial and industrial electrical systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features and Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e400 Amp Continuous Rating\u003c\/li\u003e\n\u003cli\u003eClass RK1 Current-Limiting Protection\u003c\/li\u003e\n\u003cli\u003eDual-Element Time-Delay Design\u003c\/li\u003e\n\u003cli\u003eReduced Nuisance Openings\u003c\/li\u003e\n\u003cli\u003eHigh AC Interrupting Capacity\u003c\/li\u003e\n\u003cli\u003eDC Fault Protection\u003c\/li\u003e\n\u003cli\u003eLow-Resistance Construction\u003c\/li\u003e\n\u003cli\u003eMotor and Transformer Compatibility\u003c\/li\u003e\n\u003cli\u003eVersatile Circuit Protection\u003c\/li\u003e\n\u003cli\u003ePotential Class H Upgrade\u003c\/li\u003e\n\u003cli\u003eStandard Fuse Mounting\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 LLNRK400\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Series:\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 400 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 the manufacturer\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 Design:\u003c\/strong\u003e Yes\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverload Element:\u003c\/strong\u003e Thermally Reversible, Spring-Loaded Thermal Element\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicating Feature:\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\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial Compliance and Certifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe manufacturer identifies the Littelfuse LLNRK400 as a Class RK1 POWR-PRO current-limiting fuse with dual-element time-delay operation.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRoHS Compliance: Confirm using current Littelfuse material compliance documentation\u003c\/li\u003e\n\u003cli\u003eREACH Compliance: Confirm using current Littelfuse material compliance documentation\u003c\/li\u003e\n\u003cli\u003eUL Certification or Listing: Verify the applicable listing and conditions in current manufacturer documentation\u003c\/li\u003e\n\u003cli\u003eCSA Certification: Verify applicable certification details in current manufacturer documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eConfirm specific material declarations, certification file numbers, and regulatory approvals against the latest manufacturer documentation when required for an installation or project.\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 Equipment\u003c\/li\u003e\n\u003cli\u003eMain Distribution Circuits\u003c\/li\u003e\n\u003cli\u003eFeeder Circuits\u003c\/li\u003e\n\u003cli\u003eGeneral-Purpose Branch Circuits\u003c\/li\u003e\n\u003cli\u003eIndustrial Motor Circuits\u003c\/li\u003e\n\u003cli\u003eTransformer Circuits\u003c\/li\u003e\n\u003cli\u003eSolenoids and Electromagnetic Devices\u003c\/li\u003e\n\u003cli\u003eFluorescent Lighting Systems\u003c\/li\u003e\n\u003cli\u003eIndustrial Machinery\u003c\/li\u003e\n\u003cli\u003eCompatible Class H Fuse Block Upgrades\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":50459264713003,"sku":"LLNRK400","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459264745771,"sku":"LLNRK400  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/llnrk400","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}