{"product_id":"jls400","title":"JLS400 - 400 Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eJLS400 - 400 Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eChoosing a 400A Class J fuse takes more than matching the amperage printed on the fuse. The JLS400 is a 400-amp fast-acting fuse rated for operation up to 600VAC, with a 200 kA interrupting rating at 600VAC. If you're checking the JLS400 as a replacement, compare the complete set of requirements—400A current rating, Class J classification, 600VAC maximum voltage, fast-acting opening characteristic, interrupting rating, knife-blade format, and mounting arrangement. That full-spec approach gives you a much clearer compatibility check than relying on amperage alone.\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 for equipment requiring a 400-amp Class J fuse\u003c\/li\u003e\n\u003cli\u003eMaximum voltage rating of 600VAC\u003c\/li\u003e\n\u003cli\u003eFast-acting (F) opening characteristic\u003c\/li\u003e\n\u003cli\u003eClass J fuse classification\u003c\/li\u003e\n\u003cli\u003ePart of the JLS current-limiting fuse family\u003c\/li\u003e\n\u003cli\u003eKnife-blade construction for the specified physical configuration\u003c\/li\u003e\n\u003cli\u003eNon-indicating design\u003c\/li\u003e\n\u003cli\u003eMounts using a compatible fuse block, clip, or holder\u003c\/li\u003e\n\u003cli\u003eLFJ60400 Series specified as the corresponding holder family\u003c\/li\u003e\n\u003cli\u003eClearly defined electrical and physical specifications help simplify replacement compatibility checks\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 JLS400\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e JLS\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Class J Fuse\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 600VAC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupting Rating:\u003c\/strong\u003e 200 kA at 600VAC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupt Amperage:\u003c\/strong\u003e 200,000A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupt Voltage Type:\u003c\/strong\u003e AC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupt Voltage:\u003c\/strong\u003e 600VAC\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\u003eFuse Class:\u003c\/strong\u003e Class J\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\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\u003eMounting Method:\u003c\/strong\u003e Fuse Block \/ Clip \/ Holder\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecified Holder Series:\u003c\/strong\u003e LFJ60400 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 supplied manufacturer specifications identify the JLS400 as a 400A Class J fast-acting fuse with a current-limiting, family-style design. They also specify a 600VAC maximum voltage rating, a 200 kA interrupting rating at 600VAC, knife-blade construction, a non-indicating design, and the mounting configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere It Works Best\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe JLS400 400A fuse suits electrical equipment that requires a 400A fast-acting Class J fuse and matches the JLS400's electrical and physical characteristics. For AC applications, confirm that the equipment requirements fall within the 600VAC maximum voltage rating and are compatible with the specified 200 kA interrupting rating at 600VAC.\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":50459219919147,"sku":"JLS400","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459219951915,"sku":"JLS400  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/jls400","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}