{"product_id":"klsr250","title":"KLSR250 - 250Amp Fuse","description":"\u003cp\u003e\u003cstrong\u003eKLSR250 - 250Amp Fuse\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA 250-amp rating may be the first thing you notice on the KLSR250, but getting the replacement right means checking the complete specification. The KLSR250 is a 250A Class RK1 fast-acting, current-limiting fuse built around the KLSR Series' single-element silver-link design. Its fast-acting characteristics make the KLSR Series particularly relevant to properly specified variable speed drives, rectifiers, and other equipment containing surge-sensitive components. One important distinction: the manufacturer cautions that inductive loads such as motors, solenoids, and transformers can produce harmless inrush currents that require different sizing considerations. In other words, don't choose this fuse by amperage alone—verify Class RK1 compatibility, voltage, interrupting capacity, fast-acting response, physical construction, and the requirements of the equipment being protected.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features and Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e250A continuous current rating for equipment specifically requiring a 250-amp fuse.\u003c\/li\u003e\n\u003cli\u003eClass RK1 fuse configuration provides an important compatibility point when identifying a replacement.\u003c\/li\u003e\n\u003cli\u003eFast-acting (F) opening characteristic provides fast overload and short-circuit protection.\u003c\/li\u003e\n\u003cli\u003eUses the KLSR Series' single-element silver-link design.\u003c\/li\u003e\n\u003cli\u003eCurrent-limiting construction reduces equipment damage caused by the heating and magnetic effects of short-circuit currents.\u003c\/li\u003e\n\u003cli\u003eRated for electrical systems up to 600VAC.\u003c\/li\u003e\n\u003cli\u003eAlso rated for appropriately specified applications up to 300VDC.\u003c\/li\u003e\n\u003cli\u003eKnife-blade construction provides the physical configuration specified for KLSR250.\u003c\/li\u003e\n\u003cli\u003eNon-indicating design means an integral blown-fuse indicator is not specified.\u003c\/li\u003e\n\u003cli\u003eDesigned for mounting in a compatible fuse block, clip, or holder.\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 KLSR250\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Description:\u003c\/strong\u003e FUS 600V F\/A CLASS RK1 250A\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 250A\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\u003eDC Interrupting Capacity:\u003c\/strong\u003e 20,000A at 300VDC\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 Knife-Blade\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\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 PG 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 supplied manufacturer information specifically identifies the KLSR Series as having a single-element silver-link design. The supplied specifications do not include a complete product-specific material breakdown for the KLSR250—including body, terminal, filler, and other component materials—so those materials should not be assumed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere It Works Best\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe KLSR250 250A fuse best matches electrical equipment designed for a 250A Class RK1, fast-acting, current-limiting fuse with the corresponding electrical and physical requirements. Manufacturer guidance specifically calls out variable speed drives, rectifiers, and other equipment containing surge-sensitive components as examples where the KLSR Series' fast-acting characteristics can be useful. Its current-limiting design is intended to reduce 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":50459237253419,"sku":"KLSR250","price":0.0,"currency_code":"USD","in_stock":false},{"title":"Refurbished","offer_id":50459237286187,"sku":"KLSR250  [R]","price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/store.circuitbreakersuperstore.com\/products\/klsr250","provider":"CIRCUIT BREAKER SUPERSTORE®","version":"1.0","type":"link"}