{"product_id":"flsr300","title":"FLSR300 - 300Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eFLSR300 - 300Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLooking for the FLSR300 because that's the exact fuse specified for your equipment? Then the details matter. This 300A Class RK5 time-delay fuse combines a 300-amp continuous current rating with ratings up to 600V AC and 300V DC, dual-element construction, and a knife-blade configuration. The FLSR300 is also a non-indicating fuse, so if you're matching an existing component, check more than the 300A marking. Fuse class, voltage, time-delay characteristics, interrupting capacity, blade configuration, and holder compatibility all need to line up with the application.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features and Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e300A continuous current rating – Built for equipment requiring a 300-amp fuse.\u003c\/li\u003e\n\u003cli\u003eClass RK5 – Makes it easier to match the correct fuse class when replacing an existing component.\u003c\/li\u003e\n\u003cli\u003eTime-delay operation – Helps accommodate appropriate short-duration startup and inrush currents.\u003c\/li\u003e\n\u003cli\u003eDual-element design – Provides the operating characteristics associated with this time-delay fuse family.\u003c\/li\u003e\n\u003cli\u003eUp to 600V AC – Suitable for properly specified AC applications within its ratings.\u003c\/li\u003e\n\u003cli\u003eUp to 300V DC – Also supports correctly matched DC applications.\u003c\/li\u003e\n\u003cli\u003eKnife-blade construction – Installs in a compatible fuse block, clip, or holder.\u003c\/li\u003e\n\u003cli\u003eNon-indicating model – Useful for matching the exact configuration of an existing FLSR300.\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\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\u003eCatalog Number:\u003c\/strong\u003e FLSR300\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e FLSR\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Type:\u003c\/strong\u003e Dual-Element Time-Delay Fuse\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Class:\u003c\/strong\u003e Class RK5\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Current Rating:\u003c\/strong\u003e 300A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum AC Voltage:\u003c\/strong\u003e 600V AC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum DC Voltage:\u003c\/strong\u003e 300V DC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpening:\u003c\/strong\u003e Slo-Blo \/ Time Lag (T) \/ Time Delay\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Knife-Blade\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFamily Style:\u003c\/strong\u003e Dual Element Fuse\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\u003eDC Interrupting Rating:\u003c\/strong\u003e 20,000A (20 kA) at 300V DC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer-Listed AC Interrupt Amperage:\u003c\/strong\u003e 200,000A and 300,000A at 600V AC*\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\u003ePG Holder:\u003c\/strong\u003e LFR60400 Series\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\u003eWhen certifications are part of the job specification, it's worth checking the paperwork rather than making assumptions. The supplied information confirms that the FLSR300 is a Class RK5 fuse. Still, it does not provide enough catalog-specific information to accurately list individual UL, CSA, RoHS, or other certification and material-compliance declarations.\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere It Works Best\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe FLSR300 makes sense when the equipment specification calls for a 300A Class RK5 time-delay fuse and brief startup or inrush current is expected during normal operation. That's where its time-delay characteristic becomes particularly useful: it can tolerate appropriate temporary increases in current without operating like a fast-acting fuse.\u003cbr\u003e\u003cbr\u003eFor replacement jobs, 300 amps is only the starting point. A fuse with the same current rating isn't automatically interchangeable. Check the required Class RK5 designation, 600V AC or 300V DC rating as applicable, time-delay operation, interrupting requirements, knife-blade configuration, and mounting arrangement before making the match.\u003cbr\u003e\u003c\/p\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":50459187839275,"sku":"FLSR300","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459187872043,"sku":"FLSR300  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/flsr300","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}