{"product_id":"flsr400","title":"FLSR400 - 400Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eFLSR400 - 400Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor electrical equipment that calls for a 400A Class RK5 time-delay fuse, getting the complete specification right matters far more than simply matching the number stamped on the fuse. The FLSR400 combines a 400-amp continuous current rating with 600V AC and 300V DC maximum voltage ratings, dual-element construction, and a knife-blade configuration. Its Slo-Blo \/ Time Lag (T) characteristics allow appropriate short-duration startup or inrush current without unnecessary opening, within the fuse's specified time-current characteristics. This is the non-indicating FLSR400, an important detail when you're matching an existing fuse or equipment specification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features and Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e400A continuous current rating – Intended for circuits and equipment specified for a 400-amp fuse.\u003c\/li\u003e\n\u003cli\u003eClass RK5 classification – Helps ensure you're matching the correct fuse class rather than choosing by amperage alone.\u003c\/li\u003e\n\u003cli\u003eTime-delay performance – Slo-Blo operation accommodates appropriate temporary startup and inrush currents while maintaining the fuse's intended overcurrent-protection function.\u003c\/li\u003e\n\u003cli\u003eDual-element construction – Provides the operating characteristics associated with this time-delay fuse design.\u003c\/li\u003e\n\u003cli\u003eKnife-blade configuration – Built for compatible fuse blocks, clips, and holders.\u003c\/li\u003e\n\u003cli\u003eNon-indicating design – The FLSR400 does not include the indicating feature found on certain other configurations, making this an important point to verify during replacement.\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 FLSR400\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\u003eProduct Type:\u003c\/strong\u003e Time-Delay Fuse\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\u003eFuse Class:\u003c\/strong\u003e Class RK5\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Current Rating:\u003c\/strong\u003e 400A\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 Characteristic:\u003c\/strong\u003e Slo-Blo \/ Time Lag (T) \/ Time Delay\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction \/ Size:\u003c\/strong\u003e Knife-Blade\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\u003eThe available product information specifically identifies the FLSR400 as a Class RK5 fuse. Exact catalog-level UL, CSA, RoHS, or other material-compliance and certification declarations were not included in the specifications supplied for this product. Those approvals should therefore be verified for the exact FLSR400 catalog number whenever a project, facility standard, or equipment specification requires them.\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 FLSR400 400A fuse is best suited to properly specified electrical systems that require Class RK5, time-delay protection and may experience brief startup or inrush currents as part of normal operation. The dual-element Slo-Blo design provides the fuse with time-delay behavior, allowing it to accommodate appropriate temporary increases in current while still performing its intended overcurrent-protection role.\u003cbr\u003e\u003cbr\u003eIt's also a practical replacement candidate when the existing specification calls for a 400A, 600V AC Class RK5 knife-blade fuse without an indicating feature. For DC applications, the FLSR400 carries a 300V DC maximum voltage rating and a 20 kA interrupting rating at 300V DC.\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":50459188134187,"sku":"FLSR400","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459188166955,"sku":"FLSR400  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/flsr400","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}