{"product_id":"cooper-bussmann-lps-rk-90sp-rk1-time-delay-fuse-90a","title":"Cooper Bussmann LPS-RK-90SP RK1 Time Delay Fuse 90A","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe COOPER BUSSMANN LPS-RK-90SP is a cartridge-style, time-delay fuse rated at 90 amps and classified as RK1. It is designed for general-purpose overcurrent protection in industrial and commercial electrical distribution systems. The fuse features a dual-element construction that provides time-delay response, allowing it to ride through normal motor-inrush and startup currents without nuisance tripping while still protecting against sustained overloads and short circuits. Rated for an interrupting capacity of 100 kA at DC and 300 kA at AC (RMS), it is suitable for high-fault-current environments. Licensed electricians and electrical contractors typically install this fuse in fusible disconnect switches and panelboards.\u003c\/p\u003e\u003cp\u003eThis fuse is suited for bolt-on mounting applications in industrial control panels, motor branch circuits, and commercial electrical distribution equipment where RK1-class overcurrent protection is required. The time-delay characteristic makes it appropriate for circuits with inductive loads such as motors, transformers, and HVAC compressor equipment. It is sold individually but carries a minimum order quantity of 3 units.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRK1 fuse class with dual-element, time-delay design for motor and inductive load circuits\u003c\/li\u003e\n\u003cli\u003e90-amp rating with 100 kA interrupting capacity at DC and 300 kA at AC (RMS)\u003c\/li\u003e\n\u003cli\u003eCartridge body type with bolt-on mount for secure installation in fusible disconnects\u003c\/li\u003e\n\u003cli\u003eNon-indicating design — no built-in blown fuse indicator\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\u003cli\u003eOverall length of 7-7\/8 inches for standard RK1 cartridge fuse holders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation fuse for bolt-on cartridge fuse holders and fusible disconnect switches that accept RK1-class cartridge fuses with a 7-7\/8-inch overall length.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed 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 an insulated fuse puller rated for the voltage and amperage of the circuit. Verify the fuse holder is rated for RK1-class fuses and is compatible with the 7-7\/8-inch cartridge length before installation.\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\u003eAmperage\u003c\/strong\u003e: 90 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 Capacity (DC)\u003c\/strong\u003e: 100 kA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupting Capacity (AC RMS)\u003c\/strong\u003e: 300 kA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 7-7\/8 inches (200 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Bolt-On\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: 0.65 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-90SP\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EATON","offers":[{"title":"Default Title","offer_id":51701066858802,"sku":"LPS-RK-90SP","price":592.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2c1850f42e51fbe7419004c939571141.jpg?v=1788397744","url":"https:\/\/voomisupply.com\/products\/cooper-bussmann-lps-rk-90sp-rk1-time-delay-fuse-90a","provider":"Voomi Supply","version":"1.0","type":"link"}