{"product_id":"llnrk300","title":"LLNRK300 - 300Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eLLNRK300 - 300Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA motor starts. Current jumps for a moment. Then everything settles into normal operation. That's how much electrical equipment works, and it's exactly why choosing the right fuse matters.\u003c\/p\u003e\n\u003cp\u003eThe LLNRK300 uses two protective elements, including a spring-loaded thermal overload element. This gives the fuse time-delay characteristics that help it tolerate temporary inrush currents from motors, transformers, and similar equipment without opening unnecessarily. When an actual overcurrent condition occurs, the fuse provides the protection your circuit needs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features and Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e300 Amp Continuous Current 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\u003eHandles Temporary Motor Starting Surges\u003c\/li\u003e\n\u003cli\u003eHelps Minimize Unnecessary Fuse Openings\u003c\/li\u003e\n\u003cli\u003eHigh Short-Circuit Interrupting Capacity\u003c\/li\u003e\n\u003cli\u003eHelps Limit Fault Energy and Equipment Damage\u003c\/li\u003e\n\u003cli\u003eLow-Resistance Construction for Reduced Power Loss\u003c\/li\u003e\n\u003cli\u003eSpring-Loaded Thermal Overload Element\u003c\/li\u003e\n\u003cli\u003ePOWR-PRO Series Performance\u003c\/li\u003e\n\u003cli\u003eCompatible Class H Fuse Block Upgrade Capability\u003c\/li\u003e\n\u003cli\u003eFuse Block, Clip, or Holder 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 LLNRK300\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 300 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\u003eCompatible 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 Suitable for certain existing installations when equipment ratings and compatibility requirements are met\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 LLNRK300 is part of the POWR-PRO Class RK1 fuse family, designed for overload and short-circuit protection in appropriately rated electrical systems.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRoHS Compliance: Confirm using current Littelfuse documentation\u003c\/li\u003e\n\u003cli\u003eREACH Compliance: Confirm using current Littelfuse documentation\u003c\/li\u003e\n\u003cli\u003eUL and CSA Certifications: Verify applicable listings and approvals with the manufacturer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor installations requiring specific safety certifications or material compliance documentation, consult the latest manufacturer specifications.\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\u003eElectrical Feeder Circuits\u003c\/li\u003e\n\u003cli\u003eGeneral-Purpose Branch Circuits\u003c\/li\u003e\n\u003cli\u003eIndustrial Motors\u003c\/li\u003e\n\u003cli\u003eTransformers\u003c\/li\u003e\n\u003cli\u003eSolenoids\u003c\/li\u003e\n\u003cli\u003eFluorescent Lighting Circuits\u003c\/li\u003e\n\u003cli\u003eHigh-Inrush Electrical Equipment\u003c\/li\u003e\n\u003cli\u003eCommercial Electrical 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":50459264581931,"sku":"LLNRK300","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459264614699,"sku":"LLNRK300  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/llnrk300","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}