{"product_id":"klsr040","title":"KLSR040 - 40Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eKLSR040 - 40Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA 40A rating may be the first thing you notice on the KLSR040, but choosing the right replacement means checking more than amperage. The KLSR040 is a 40A Class RK1 fast-acting, current-limiting fuse built around a single-element silver-link design. The KLSR040 uses an industrial cartridge format and does not include an indicating feature. If you're replacing an existing fuse, verify the 40A rating, Class RK1 designation, fast-acting characteristic, AC or DC voltage requirements, interrupting capacity, and physical fit rather 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\u003e40A continuous current rating for equipment specifically requiring this amperage.\u003c\/li\u003e\n\u003cli\u003eClass RK1 fuse configuration provides a defined fuse class for accurate replacement matching.\u003c\/li\u003e\n\u003cli\u003eFast-acting (F) operation provides quick overload and short-circuit protection.\u003c\/li\u003e\n\u003cli\u003eThe current-limiting design helps reduce damage from the heating and magnetic effects of short-circuit currents.\u003c\/li\u003e\n\u003cli\u003eRated for a maximum of 600VAC.\u003c\/li\u003e\n\u003cli\u003eSupports applications up to 300VDC, subject to the equipment's complete electrical requirements.\u003c\/li\u003e\n\u003cli\u003eManufacturer-identified applications include variable speed drives and rectifiers.\u003c\/li\u003e\n\u003cli\u003eIndustrial cartridge construction provides the specified physical fuse format.\u003c\/li\u003e\n\u003cli\u003eNon-indicating design suits installations where an integral fuse-status indicator is not required.\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 KLSR040\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Description:\u003c\/strong\u003e FUS 600V F\/A CLASS RK1 40A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e KLSR\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Fast-Acting, Current-Limiting Fuse\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Current Rating:\u003c\/strong\u003e 40A\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\u003eAC Interrupting Capacity:\u003c\/strong\u003e 200,000A at 600VAC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eListed Interrupting Rating:\u003c\/strong\u003e 20 kA at 300VDC\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 RK1\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 Industrial Cartridge\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElement Design:\u003c\/strong\u003e Single-element silver link\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicating:\u003c\/strong\u003e No\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 information identifies the KLSR Series as using a single-element silver-link design, so silver is specifically documented as part of the fuse-element construction. The supplied information does not include a complete, product-specific breakdown of the KLSR040's remaining materials.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere It Works Best\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe KLSR040 40A fuse suits electrical equipment designed for a 40A, Class RK1, fast-acting current-limiting fuse with compatible voltage, interrupting, and physical requirements. The manufacturer specifically points to variable speed drives, rectifiers, and other equipment containing surge-sensitive components as applications where the KLSR Series' fast-acting characteristics can be useful. Its current-limiting design is intended to reduce equipment damage associated with the heating and magnetic effects of short-circuit currents.\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":50459236335915,"sku":"KLSR040","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459236368683,"sku":"KLSR040  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/klsr040","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}