{"product_id":"cooper-bussmann-lps-rk-6-1-4sp-rk1-time-delay-fuse-6-25a","title":"Cooper Bussmann LPS-RK-6-1\/4SP RK1 Time Delay Fuse 6.25A","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe COOPER BUSSMANN LPS-RK-6-1\/4SP is a Class RK1 cartridge time delay fuse rated at 6.25 amps. It is designed for general-purpose overcurrent protection in industrial and commercial electrical systems. The dual-element, time delay construction allows it to ride through harmless inrush currents while still providing fast, reliable response to sustained overloads and short-circuit faults. It carries an interrupting rating of 100 kA at DC and 300 kA at AC (RMS), making it suitable for high-available-fault-current applications. Electricians and maintenance technicians install this fuse in fuse holders sized for Class RK1 cartridge fuses.\u003c\/p\u003e\u003cp\u003eThis fuse is used in branch-circuit and feeder protection for motors, transformers, and general electrical loads in residential, commercial, and light industrial settings. The RK1 classification indicates a rejection-style fuse body that prevents accidental substitution with lower-rated fuse classes. It fits standard fuse holders and fuse blocks configured for 5-inch Class RK1 cartridge fuses. Applications include motor starters, control panels, disconnect switches, and distribution boards where time delay characteristics are required to handle motor starting inrush without nuisance tripping.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eClass RK1 rejection-style cartridge body prevents substitution with lower interrupting-rated fuses\u003c\/li\u003e\n\u003cli\u003e6.25-amp rating with time delay characteristic suits motor and transformer protection\u003c\/li\u003e\n\u003cli\u003eDual-element construction distinguishes between inrush and sustained overload conditions\u003c\/li\u003e\n\u003cli\u003eHigh interrupting capacity: 100 kA at DC and 300 kA at AC (RMS)\u003c\/li\u003e\n\u003cli\u003eNon-indicating design with standard cartridge form factor for fuse-holder mounting\u003c\/li\u003e\n\u003cli\u003eCE Certified, CSA Certified (C22.2 No. 248.12), and UL Listed (Guide JDDZ File E4273)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-install cartridge fuse for Class RK1 fuse holders and fuse blocks accepting a 5-inch overall length, 20.6 mm diameter cartridge body.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. Always de-energize and lock out the circuit before removing or installing fuses. Use fuse pullers rated for this fuse size to avoid contact with live components. Confirm the fuse holder is rated for Class RK1 cartridge fuses before installation to maintain the rejection-class integrity.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Class\u003c\/strong\u003e: RK1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Type\u003c\/strong\u003e: General Purpose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 6.25 amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Timing\u003c\/strong\u003e: Time Delay\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Body Type\u003c\/strong\u003e: Cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Elements\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupting Rating (AC RMS)\u003c\/strong\u003e: 300 kA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupting Rating (DC)\u003c\/strong\u003e: 100 kA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Diameter\u003c\/strong\u003e: 0.811 inches (20.60 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Fuse Holder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicating\u003c\/strong\u003e: Non-Indicating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.15 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications\u003c\/strong\u003e: CE Certified; CSA C22.2 No. 248.12 Class 1422-02 File 53787; UL Listed Guide JDDZ File E4273\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 39121605\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: COOPER BUSSMANN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: LPS-RK-6-1\/4SP\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EATON","offers":[{"title":"Default Title","offer_id":51693328204082,"sku":"LPS-RK-6-1\/4SP","price":375.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c355023730eb7958862bc98656c4ed96.jpg?v=1788310715","url":"https:\/\/voomisupply.com\/products\/cooper-bussmann-lps-rk-6-1-4sp-rk1-time-delay-fuse-6-25a","provider":"Voomi Supply","version":"1.0","type":"link"}