{"product_id":"flnr400","title":"FLNR400 - 400 Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eFLNR400 - 400 Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen your electrical system calls for a 400-amp Class RK5 fuse that can tolerate normal startup currents without sacrificing dependable overcurrent protection, the FLNR400 is designed to meet the requirement. This dual-element, time-delay fuse carries a 400A continuous current rating and is rated for applications up to 250VAC and 125VDC. Its Slo-Blo\/time-delay operating characteristics make it particularly useful in circuits where motors, transformers, and other electrical equipment may experience temporary inrush current during startup.\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 supports high-current commercial and industrial electrical applications.\u003c\/li\u003e\n\u003cli\u003eClass RK5 fuse design provides the specific fuse classification required by compatible equipment and systems.\u003c\/li\u003e\n\u003cli\u003eDual-element construction combines time-delay performance with overcurrent protection.\u003c\/li\u003e\n\u003cli\u003eSlo-Blo \/ time-delay operation helps accommodate brief, normal inrush currents that can occur when equipment starts.\u003c\/li\u003e\n\u003cli\u003eA 250 VAC maximum voltage rating supports compatible AC electrical systems.\u003c\/li\u003e\n\u003cli\u003eA 125 VDC maximum voltage rating provides versatility for qualifying DC applications.\u003c\/li\u003e\n\u003cli\u003eKnife-blade construction provides a secure physical form factor for compatible fuse-mounting equipment.\u003c\/li\u003e\n\u003cli\u003eFuse block, clip, or holder mounting allows installation in equipment designed for this fuse type.\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 FLNR400\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e FLNR\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 400A\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\u003eFamily Style:\u003c\/strong\u003e Dual Element Fuse\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\u003eMaximum AC Voltage:\u003c\/strong\u003e 250VAC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum DC Voltage:\u003c\/strong\u003e 125VDC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC Interrupting Rating:\u003c\/strong\u003e Up to 300 kA\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\u003eSize \/ Construction:\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\u003eMounting Method:\u003c\/strong\u003e Fuse Block \/ Clip \/ Holder\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecified Holder:\u003c\/strong\u003e LFR25400 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 FLNR400 is part of the FLNR Class RK5 fuse family. Because certification, agency approval, and material-compliance requirements can vary by installation and may be updated over time, users should confirm the applicable documentation for the specific project or electrical system. This is especially important in installations governed by facility standards, engineering specifications, or local electrical codes.\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 FLNR400 is a practical choice for commercial and industrial electrical systems that specifically require a 400A, Class RK5, dual-element time-delay fuse. Its time-delay characteristics are particularly valuable around equipment that can draw considerably more than its normal operating current for a short period when starting. Rather than reacting unnecessarily to an expected temporary surge, the fuse is designed to accommodate normal inrush while protecting sustained overcurrent conditions.\u003cbr\u003e\u003cbr\u003eThat makes the FLNR400 well suited to appropriately engineered motor circuits, transformer circuits, machinery, industrial equipment, and electrical distribution applications where its ratings match the system requirements. The combination of a 400A rating, 250VAC\/125VDC capability, and high AC interrupting capacity makes it especially relevant for demanding electrical environments.\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":50459180826923,"sku":"FLNR400","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459180859691,"sku":"FLNR400  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/flnr400","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}