{"product_id":"littelfuse-flq-4-1-2-fuse","title":"Littelfuse FLQ-4-1\/2 Time-Delay Midget Fuse 4.5A 500VAC","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-blue:#dcebf5;--steel-blue-2:#edf6fb;--steel-line:#c9dce9;--surface:#ffffff;--surface-soft:#f7fbfe;--text-main:#173042;--text-muted:#5e7382;--shadow-soft:0 10px 30px rgba(8,47,73,0.08);--shadow-hover:0 16px 36px rgba(8,79,124,0.15);--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(15,110,168,0.025) 1px,transparent 1px),linear-gradient(90deg,rgba(15,110,168,0.025) 1px,transparent 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(prefers-reduced-motion:reduce){.nxs-industrial-product-page,.nxs-industrial-product-page *,.nxs-industrial-product-page *::before,.nxs-industrial-product-page *::after{transition:none!important;}}\u003c\/style\u003e\u003cdiv class=\"nxs-industrial-product-page\"\u003e\u003cdiv class=\"container\"\u003e\u003cmain\u003e\u003csection class=\"section\"\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"spec-table\"\u003e\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\u003eFLQ-4-1\/2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Category\u003c\/td\u003e\n\u003ctd\u003eTime-Delay Midget Fuse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuse Series\u003c\/td\u003e\n\u003ctd\u003eFLQ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Rating\u003c\/td\u003e\n\u003ctd\u003e4.5 A (4-1\/2 A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Voltage Rating\u003c\/td\u003e\n\u003ctd\u003e500 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\u003eOperating Characteristic\u003c\/td\u003e\n\u003ctd\u003eTime-Delay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuse Format\u003c\/td\u003e\n\u003ctd\u003eMidget Cylindrical Fuse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e10 x 38 mm (Nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTermination Style\u003c\/td\u003e\n\u003ctd\u003eFerrule End Caps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndication\u003c\/td\u003e\n\u003ctd\u003eNon-Indicating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Interrupting Rating\u003c\/td\u003e\n\u003ctd\u003e10 kA RMS Symmetrical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC Interrupting Rating\u003c\/td\u003e\n\u003ctd\u003e10 kA (Manufacturer Self-Certified)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuse Body Material\u003c\/td\u003e\n\u003ctd\u003ePaper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd Cap Material\u003c\/td\u003e\n\u003ctd\u003eNickel-Plated Copper Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompliance\u003c\/td\u003e\n\u003ctd\u003eUL Listed and CSA Certified for AC Applications; RoHS Compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Type\u003c\/td\u003e\n\u003ctd\u003eSupplemental Overcurrent Protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/section\u003e\u003csection class=\"section\"\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cdiv class=\"features\"\u003e\n\u003carticle class=\"card\"\u003e\u003ch3\u003e4.5 A Current Rating\u003c\/h3\u003e\n\u003cp\u003eProvides supplemental overcurrent protection for electrical circuits requiring a 4.5 A fuse rating.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"card\"\u003e\u003ch3\u003e500 VAC and 300 VDC Ratings\u003c\/h3\u003e\n\u003cp\u003eSupports appropriately specified AC and DC applications within the published voltage and interrupting ratings.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"card\"\u003e\u003ch3\u003eTime-Delay Operation\u003c\/h3\u003e\n\u003cp\u003eHelps accommodate temporary inrush currents associated with control power transformers, solenoids and other compatible loads according to the published time-current characteristics.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"card\"\u003e\u003ch3\u003eCompact 10 x 38 mm Format\u003c\/h3\u003e\n\u003cp\u003eFeatures a cylindrical midget fuse design for installation in dimensionally compatible and properly rated fuse holders.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"card\"\u003e\u003ch3\u003eFerrule End Connections\u003c\/h3\u003e\n\u003cp\u003eNickel-plated copper-alloy end caps provide electrical contact surfaces for compatible fuse holders.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"card\"\u003e\u003ch3\u003eSupplemental Circuit Protection\u003c\/h3\u003e\n\u003cp\u003eThe FLQ series is designed for supplemental protection of control power transformers, solenoids and circuits with high temporary inrush currents.\u003c\/p\u003e\u003c\/article\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"section\"\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIndustrial control power transformers\u003c\/li\u003e\n\u003cli\u003eSolenoid control circuits\u003c\/li\u003e\n\u003cli\u003eCircuits with temporary high inrush currents\u003c\/li\u003e\n\u003cli\u003eIndustrial electrical control panels\u003c\/li\u003e\n\u003cli\u003eFactory automation control equipment\u003c\/li\u003e\n\u003cli\u003eSupplemental overcurrent protection\u003c\/li\u003e\n\u003cli\u003eElectrical equipment maintenance and replacement\u003c\/li\u003e\n\u003cli\u003eCompatible 10 x 38 mm midget fuse holders\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003csection class=\"section\"\u003e\u003ch2\u003ePurchase Information\u003c\/h2\u003e\n\u003cp\u003eWe support online purchase of the Littelfuse FLQ-4-1\/2 Time-Delay Midget Fuse. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"section\"\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the Littelfuse FLQ-4-1\/2?\u003c\/strong\u003e\u003cbr\u003eIt is a 4.5 A time-delay midget fuse from the Littelfuse FLQ series, designed for supplemental overcurrent protection.\u003c\/p\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eWhat is the rated current of FLQ-4-1\/2?\u003c\/strong\u003e\u003cbr\u003eThe rated current is 4.5 A, equivalent to 4-1\/2 amperes.\u003c\/p\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eWhat is its AC voltage rating?\u003c\/strong\u003e\u003cbr\u003eThe published AC voltage rating is 500 VAC or less.\u003c\/p\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eCan FLQ-4-1\/2 be used in DC circuits?\u003c\/strong\u003e\u003cbr\u003eThe FLQ series has a published 300 VDC rating. Verify the DC interrupting requirements and circuit conditions before selecting the fuse.\u003c\/p\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eIs FLQ-4-1\/2 a fast-acting fuse?\u003c\/strong\u003e\u003cbr\u003eNo. It is a time-delay fuse intended to accommodate certain temporary inrush currents according to its time-current characteristics.\u003c\/p\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of FLQ-4-1\/2?\u003c\/strong\u003e\u003cbr\u003eIt uses the nominal 10 x 38 mm cylindrical midget fuse format. Check the dimensions and installation requirements of the intended holder.\u003c\/p\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eWhat type of terminals does this fuse use?\u003c\/strong\u003e\u003cbr\u003eThe standard FLQ-4-1\/2 uses ferrule-style end caps.\u003c\/p\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eWhat is its interrupting rating?\u003c\/strong\u003e\u003cbr\u003eThe FLQ series has a published 10 kA RMS symmetrical AC interrupting rating and a 10 kA manufacturer-self-certified DC interrupting rating.\u003c\/p\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eWhat materials are used in this fuse?\u003c\/strong\u003e\u003cbr\u003eThe Littelfuse FLQ series datasheet specifies a paper body for ratings from 0.1 A through 5 A and nickel-plated copper-alloy end caps.\u003c\/p\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eWhere is the FLQ-4-1\/2 typically used?\u003c\/strong\u003e\u003cbr\u003eTypical applications include control power transformers, solenoid circuits and equipment with temporary high inrush currents.\u003c\/p\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eCan FLQ-4-1\/2 be used for branch-circuit protection?\u003c\/strong\u003e\u003cbr\u003eThe FLQ series is intended for supplemental overcurrent protection. Applications requiring branch-circuit protection must use a device with the appropriate classification and ratings.\u003c\/p\u003e\n\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eWhat should be checked before ordering?\u003c\/strong\u003e\u003cbr\u003eConfirm the full model number, 4.5 A current rating, circuit voltage, available fault current, time-delay characteristics, fuse dimensions and holder compatibility.\u003c\/p\u003e\u003c\/section\u003e\u003c\/main\u003e\u003c\/div\u003e\u003c\/div\u003e","brand":"Littelfuse","offers":[{"title":"1PCS","offer_id":67858348474447,"sku":"LL1-LI-FLQ4 1\/2*1","price":6.98,"currency_code":"USD","in_stock":true},{"title":"5PCS","offer_id":67858348507215,"sku":"LL1-LI-FLQ4 1\/2*5","price":27.92,"currency_code":"USD","in_stock":true},{"title":"10PCS","offer_id":67858348539983,"sku":"LL1-LI-FLQ4 1\/2*10","price":48.86,"currency_code":"USD","in_stock":true},{"title":"20PCS","offer_id":67858348572751,"sku":"LL1-LI-FLQ4 1\/2*20","price":83.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/7569\/2623\/files\/FLQ-4-1_2-01_44db0928-e59e-48c5-b3f5-6b5cc39672cb.jpg?v=1792827709","url":"https:\/\/yunshuotrade.com\/products\/littelfuse-flq-4-1-2-fuse","provider":"yunshuotrade","version":"1.0","type":"link"}