{"product_id":"flsr004","title":"FLSR004 - 4 Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eFLSR004 - 4 Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen your circuit has normal startup current but still needs dependable overcurrent protection, the FLSR004 4A Class RK5 time-delay fuse is built for the job. This dual-element industrial cartridge fuse is rated for 4 amps, up to 600 VAC and 300 VDC, making it suitable for a range of motor, transformer, feeder, and general-purpose circuit applications. Its time-delay characteristic is an important part of the design. Rather than opening simply because a motor or other inductive load produces a brief, expected inrush current, the FLSR004 can accommodate those temporary conditions when properly sized for the circuit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features and Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4-amp rating – Designed for applications requiring a 4A Class RK5 fuse.\u003c\/li\u003e\n\u003cli\u003eTime-delay operation – Helps accommodate temporary startup and inrush currents without sacrificing protection against sustained overload conditions.\u003c\/li\u003e\n\u003cli\u003eDual-element design – Combines time-delay performance with effective overcurrent protection.\u003c\/li\u003e\n\u003cli\u003e600VAC \/ 300VDC rated – Suitable for compatible AC and DC applications within its specified ratings.\u003c\/li\u003e\n\u003cli\u003eCurrent-limiting protection – Helps limit fault current during qualifying short-circuit conditions.\u003c\/li\u003e\n\u003cli\u003eClass RK5 construction – Designed to the applicable UL 248-12 Class RK5 requirements.\u003c\/li\u003e\n\u003cli\u003eIndustrial cartridge style – Made for use with compatible fuse blocks, clips, and holders.\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 FLSR004\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\u003eCurrent Rating:\u003c\/strong\u003e 4A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum AC Voltage:\u003c\/strong\u003e 600VAC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum DC Voltage:\u003c\/strong\u003e 300VDC\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\u003eSize \/ Style:\u003c\/strong\u003e Industrial Cartridge\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\u003eAC Interrupting Rating:\u003c\/strong\u003e 200 kA RMS Symmetrical\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional AC Interrupting Rating:\u003c\/strong\u003e 300 kA RMS Symmetrical, Manufacturer Self-Certified\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC Interrupting Rating:\u003c\/strong\u003e 20 kA\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:\u003c\/strong\u003e LFR60030 Series\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplicable Standard:\u003c\/strong\u003e UL 248-12, Class RK5\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 FLSR004 is part of the Class RK5 fuse series, manufactured to meet recognized industrial circuit-protection requirements. Manufacturer documentation identifies the series as UL Listed under File E81895 and CSA Certified under File LR29862, with the FLSR Series specified to UL 248-12 Class RK5 requirements.\u003cbr\u003e\u003cbr\u003eFor an application that requires a specific environmental or material declaration, such as RoHS or REACH documentation, the current compliance documentation for the exact FLSR004 catalog number should be confirmed before specifying the fuse.\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 FLSR004 makes the most sense in electrical systems where a little patience during startup is a good thing. Motors and transformers, for example, can briefly draw considerably more current when energized than they do during normal operation. A properly selected time-delay fuse is designed to handle that temporary inrush while remaining ready to respond to an actual overload or short circuit.\u003cbr\u003e\u003cbr\u003eTypical FLSR Series applications include motor branch circuits, motor control center mains, transformers, switchboard mains and feeders, service entrance switches, and general-purpose circuits. The 4A rating also makes the FLSR004 useful when maintaining or replacing an existing fuse in equipment specifically designed around this amperage and fuse class.\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":50459182727467,"sku":"FLSR004","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459182760235,"sku":"FLSR004  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/flsr004","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}