{"product_id":"jlln400","title":"JLLN400 - 400Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eJLLN400 - 400Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor a 400-amp Class T fuse, getting the current rating right is only one part of the picture. The Littelfuse JLLN400 offers a clear combination of characteristics: fast-acting operation, a current-limiting design, and knife-blade\/bolt-in construction. For maintenance teams, electricians, and equipment owners working from your existing JLLN400 specification, those details provide a practical compatibility checklist.\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: Provides a clear amperage specification to verify against the equipment requirements.\u003c\/li\u003e\n\u003cli\u003eClass T fuse: The fuse class is explicitly identified, helping narrow down the correct component for compatible equipment.\u003c\/li\u003e\n\u003cli\u003eFast-acting operation: Littelfuse specifies an F (Fast-Acting) opening characteristic.\u003c\/li\u003e\n\u003cli\u003eCurrent-limiting design: Identified by the manufacturer as part of the JLLN400 family style.\u003c\/li\u003e\n\u003cli\u003eAC and DC voltage ratings: Rated for a maximum of 300VAC and 125VDC, giving you distinct ratings to check for the intended circuit.\u003c\/li\u003e\n\u003cli\u003eKnife-blade\/bolt-in format: A defined physical configuration that should be checked along with the electrical specifications.\u003c\/li\u003e\n\u003cli\u003eNon-indicating: The JLLN400 does not include an indicating feature.\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 JLLN400\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e JLLN\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Description:\u003c\/strong\u003e FUS 300V F\/A CLASS T 400A\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\u003eFuse Class:\u003c\/strong\u003e Class T\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpening Characteristic:\u003c\/strong\u003e Fast-Acting (F)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFamily Style:\u003c\/strong\u003e Current Limiting\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum AC Voltage:\u003c\/strong\u003e 300VAC\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 200,000A (200 kA) at 300VAC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC Interrupting Rating:\u003c\/strong\u003e 20,000A (20 kA) at 125VDC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize \/ Construction:\u003c\/strong\u003e Knife-Blade\/Bolt-In\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\u003ePG Holder:\u003c\/strong\u003e LFT30400 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 manufacturer specifications supplied for the JLLN400 included no specific UL, CSA, CE, RoHS, REACH, or other material-compliance or certification information. That does not establish that the product lacks any particular certification. If an approval or material-compliance requirement matters to the application, confirm it with current authoritative manufacturer documentation and the markings on the actual fuse.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere It Works Best\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe Littelfuse JLLN400 400A fuse is best for compatible electrical equipment that requires a 400A Class T, fast-acting, current-limiting fuse with knife-blade\/bolt-in construction. Its clearly separated AC and DC ratings also make specification matching more straightforward: 300VAC with a 200 kA interrupting capacity, or 125VDC with a 20 kA interrupting capacity, depending on the equipment and circuit requirements.\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":50459212874027,"sku":"JLLN400","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459212906795,"sku":"JLLN400  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/jlln400","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}