{"product_id":"littelfuse-klkr-7-fuse","title":"Littelfuse KLKR-7 Class CC Fast-Acting Fuse","description":"\u003cstyle\u003e.nxs-industrial-product-page{--industrial-navy:#082f49;--industrial-blue:#0b4f7c;--industrial-blue-2:#0f6ea8;--industrial-blue-3:#1784c1;--industrial-cyan:#38bdf8;--steel-line:#c9dce9;--surface:#fff;--surface-soft:#f7fbfe;--text-main:#173042;--shadow-soft:0 10px 30px rgba(8,47,73,.08);--shadow-hover:0 16px 36px rgba(8,79,124,.15);--radius-lg:14px;--radius-md:10px}.nxs-industrial-product-page,.nxs-industrial-product-page *{margin:0;padding:0;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif}.nxs-industrial-product-page{background-color:#f3f8fb;background-image:linear-gradient(180deg,#eef6fb 0,#f7fafc 320px,#eef3f7 100%),linear-gradient(rgba(15,110,168,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(15,110,168,.025) 1px,transparent 1px);background-size:auto,34px 34px,34px 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*::before,.nxs-industrial-product-page *::after{transition:none!important}}\u003c\/style\u003e\n\u003cdiv class=\"nxs-industrial-product-page\"\u003e\n\u003cdiv class=\"container\"\u003e\u003cmain\u003e\n\u003csection class=\"section\"\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eLittelfuse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel Number\u003c\/td\u003e\n\u003ctd\u003eKLKR-7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Category\u003c\/td\u003e\n\u003ctd\u003eClass CC Fast-Acting Fuse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Series\u003c\/td\u003e\n\u003ctd\u003ePOWR-GARD KLKR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Rating\u003c\/td\u003e\n\u003ctd\u003e7 A (7000 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Voltage Rating\u003c\/td\u003e\n\u003ctd\u003e600 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC Voltage Rating\u003c\/td\u003e\n\u003ctd\u003e300 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuse Class\u003c\/td\u003e\n\u003ctd\u003eUL Class CC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Characteristic\u003c\/td\u003e\n\u003ctd\u003eFast-Acting (Fast-Blow)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection class=\"section\"\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cdiv class=\"features\"\u003e\n\u003carticle class=\"card\"\u003e\n\u003ch3\u003e7 A Current Rating\u003c\/h3\u003e\n\u003cp\u003eThe Littelfuse KLKR-7 features a 7 ampere current rating, equivalent to 7000 milliamperes. It is designed for appropriately specified electrical equipment, industrial control circuits and branch circuit applications requiring Class CC fast-acting overcurrent protection.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"card\"\u003e\n\u003ch3\u003eFast-Acting Overload Response\u003c\/h3\u003e\n\u003cp\u003eThe KLKR series provides fast-acting protection for circuits requiring a rapid response to overload conditions. Its operating characteristics differ from the time-delay Littelfuse KLDR series. Expected startup currents, transient loads and inrush conditions should be evaluated when selecting a fuse.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"card\"\u003e\n\u003ch3\u003e600 VAC and 300 VDC Ratings\u003c\/h3\u003e\n\u003cp\u003eThe KLKR-7 is rated for compatible AC circuits up to 600 VAC and DC circuits up to 300 VDC. These separate voltage ratings support protective-device selection according to the circuit type and operating voltage. The available prospective fault current must remain within the applicable interrupting rating.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"card\"\u003e\n\u003ch3\u003eHigh Interrupting Capacity\u003c\/h3\u003e\n\u003cp\u003eThe KLKR series provides an AC interrupting rating of 200 kA RMS symmetrical and a DC interrupting rating of 20 kA. Littelfuse identifies the DC rating as manufacturer self-certified. The fuse must be applied within the relevant voltage and interrupting-capacity limits.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"card\"\u003e\n\u003ch3\u003eCurrent-Limiting Class CC Protection\u003c\/h3\u003e\n\u003cp\u003eThe current-limiting design helps reduce the heating and magnetic effects associated with short-circuit currents. Rejection-style construction helps prevent installation of fuses with insufficient ratings when used with compatible Class CC rejection-type fuse holders.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"card\"\u003e\n\u003ch3\u003eCompact Industrial Construction\u003c\/h3\u003e\n\u003cp\u003eThe fuse features a melamine body, nickel-plated bronze end caps and a nominal cartridge size of 10.3 x 38.1 mm. Its compact format supports compatible industrial panels and OEM assemblies. Confirm the fuse holder's Class CC compatibility and electrical ratings before installation.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"section\"\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGeneral-purpose industrial branch circuit protection\u003c\/li\u003e\n\u003cli\u003eIndustrial electrical control panels\u003c\/li\u003e\n\u003cli\u003eOEM electrical equipment and assemblies\u003c\/li\u003e\n\u003cli\u003eControl circuits requiring fast overload response\u003c\/li\u003e\n\u003cli\u003eSolid-state devices requiring compatible fast-acting protection\u003c\/li\u003e\n\u003cli\u003eElectronic equipment requiring Class CC fuse protection\u003c\/li\u003e\n\u003cli\u003eLighting and auxiliary circuits with compatible fuse requirements\u003c\/li\u003e\n\u003cli\u003eReplacement applications requiring the specified 7 A KLKR fuse\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection class=\"section\"\u003e\n\u003ch2\u003ePurchase Information\u003c\/h2\u003e\n\u003cp\u003eWe support online purchase of the Littelfuse KLKR-7 Class CC Fast-Acting Fuse. If you need to make bulk purchases or inquire about other products, please contact our team with your purchase requirements. We can provide information regarding quantity quotations, delivery arrangements and transportation methods. Please verify the exact model, current rating, electrical specifications and required purchase quantity before ordering.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the Littelfuse KLKR-7?\u003c\/strong\u003e\u003cbr\u003eThe Littelfuse KLKR-7 is a 7 A Class CC fast-acting, current-limiting cartridge fuse in the POWR-GARD KLKR series. It is intended for general-purpose branch circuit protection and compatible industrial equipment requiring fast overload response.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the manufacturer catalog number?\u003c\/strong\u003e\u003cbr\u003eThe manufacturer catalog number is KLKR007. The product marking is KLKR 7A, and KLKR007.T is the manufacturer ordering number for a 10-piece pack.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the current rating?\u003c\/strong\u003e\u003cbr\u003eThe rated current is 7 amperes, equivalent to 7000 milliamperes.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the voltage ratings?\u003c\/strong\u003e\u003cbr\u003eThe KLKR series is rated for 600 VAC and 300 VDC. Select the appropriate rating according to the circuit type and operating voltage.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the interrupting ratings?\u003c\/strong\u003e\u003cbr\u003eThe series has an AC interrupting rating of 200 kA RMS symmetrical and a DC interrupting rating of 20 kA. The manufacturer identifies the DC rating as self-certified.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eIs KLKR-7 fast-acting or time-delay?\u003c\/strong\u003e\u003cbr\u003eKLKR-7 is a fast-acting fuse. The KLDR series has time-delay characteristics, so the two series should not be treated as interchangeable solely because their current ratings match.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eCan KLKR-7 replace KLDR-7?\u003c\/strong\u003e\u003cbr\u003eNot automatically. Although both are Class CC fuses with a 7 A current rating, KLKR is fast-acting while KLDR is time-delay. Confirm circuit requirements, startup current, protective coordination and manufacturer recommendations before choosing a replacement.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the physical dimensions?\u003c\/strong\u003e\u003cbr\u003eThe nominal cartridge dimensions are 10.3 mm in diameter and 38.1 mm in length, approximately 0.406 x 1.500 inches. Confirm that the existing fuse holder supports the Class CC format and required electrical ratings.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhich equipment can use KLKR-7?\u003c\/strong\u003e\u003cbr\u003eThe KLKR series is intended for general-purpose branch circuit protection and is commonly specified for compatible OEM equipment, control panels and electronic circuits requiring fast-acting protection. The suitability of the 7 A rating must be established from the equipment and circuit requirements.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the manufacturer publish a specific I²t value for KLKR-7?\u003c\/strong\u003e\u003cbr\u003eThe manufacturer datasheet's electrical table lists numerical total clearing I²t values for selected current ratings but does not list a separate numerical value for KLKR007.T. Values from other current ratings should not be substituted for the 7 A model.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhich fuse holders are compatible?\u003c\/strong\u003e\u003cbr\u003eLittelfuse lists the L60030C and LPSC\/LFPSC Touch-Safe holder series as accessories. Verify Class CC compatibility, operating voltage, interrupting capacity and the requirements of the electrical installation before use.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the KLKR series have UL and CSA certifications?\u003c\/strong\u003e\u003cbr\u003eThe Littelfuse datasheet identifies UL Listing under file E81895 and CSA Certification under file LR29862. The series documentation also identifies RoHS compliance and a manufacturer Declaration of Conformity.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat should be checked before ordering KLKR-7?\u003c\/strong\u003e\u003cbr\u003eConfirm the KLKR-7 model designation, manufacturer catalog number KLKR007, 7 A current rating, 600 VAC or 300 VDC circuit requirement, fast-acting characteristic, interrupting capacity, compatible Class CC fuse holder and required pack quantity. KLKR007.T is the manufacturer's 10-piece ordering number; confirm the actual selling quantity separately.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/main\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Littelfuse","offers":[{"title":"10PCS","offer_id":67918033354831,"sku":"LL1-LI-KLKR-7*10","price":48.86,"currency_code":"USD","in_stock":true},{"title":"5PCS","offer_id":67918033387599,"sku":"LL1-LI-KLKR-7*5","price":27.92,"currency_code":"USD","in_stock":true},{"title":"1PCS","offer_id":67918033420367,"sku":"LL1-LI-KLKR-7*1","price":6.98,"currency_code":"USD","in_stock":true},{"title":"20PCS","offer_id":67918033453135,"sku":"LL1-LI-KLKR-7*20","price":83.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/7569\/2623\/files\/KLKR-6-01.jpg?v=1793258478","url":"https:\/\/yunshuotrade.com\/products\/littelfuse-klkr-7-fuse","provider":"yunshuotrade","version":"1.0","type":"link"}