{"product_id":"cooper-bussmann-frn-r-50-rk5-time-delay-fuse-50a","title":"Cooper Bussmann FRN-R-50 RK5 Time Delay Fuse 50A","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe COOPER BUSSMANN FRN-R-50 is a cartridge-style, time-delay fuse rated at 50 amps in the Class RK5 designation. It measures 3 inches in overall length and 0.81 inches in diameter, and it mounts in a standard fuse holder. The dual-element construction delivers time-delay characteristics that allow temporary overloads, such as motor inrush current, to pass without nuisance opening, while still responding quickly to sustained fault conditions. Licensed electricians and HVAC technicians install this fuse as overcurrent protection in motor branch circuits, HVAC equipment, and industrial control panels. It carries CE, CSA, and UL listings for broad code compliance.\u003c\/p\u003e\u003cp\u003eThis fuse is suited for residential and light commercial applications where Class RK5 overcurrent protection is required. Typical installations include motor circuits, compressor disconnect boxes, HVAC unit disconnects, and other equipment requiring time-delay fusing to handle inrush loads. The dual-element design makes it appropriate for inductive loads where a fast-blow fuse would open unnecessarily during startup. It seats in any standard Class RK5-rated fuse holder or disconnect switch configured for that class.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e50-amp time-delay rating handles motor inrush without nuisance trips\u003c\/li\u003e\n\u003cli\u003eClass RK5 dual-element construction for inductive load protection\u003c\/li\u003e\n\u003cli\u003eCartridge body fits standard RK5 fuse holders and disconnect switches\u003c\/li\u003e\n\u003cli\u003eNon-indicating design keeps installation simple and cost-effective\u003c\/li\u003e\n\u003cli\u003eUL Listed 248-12 Class RK5, CSA C22.2 No. 248.12, and CE Certified\u003c\/li\u003e\n\u003cli\u003e20 kA DC interrupt rating at 200 volts RMS provides robust fault clearing capacity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard Class RK5 fuse holders and disconnects requiring a 50-amp, time-delay cartridge fuse.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the circuit before removing or installing the fuse. Verify that the fuse holder is rated for Class RK5 and that the replacement fuse matches the amperage and voltage rating of the original. Never install a fuse with a higher amperage rating than the circuit is designed to carry.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Class\u003c\/strong\u003e: RK5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 50 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\u003eInterrupt Rating\u003c\/strong\u003e: 20 kA at 200 volts RMS (DC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3 inches (76.2 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Diameter\u003c\/strong\u003e: 0.81 inches (20.6 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: 0.12 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: UL Listed 248-12 Class RK5 Guide JDDZ File E4273; CSA C22.2 No. 248.12 Class 1422-02 File 53787; CE Certified\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: FRN-R-50\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EATON","offers":[{"title":"Default Title","offer_id":51714111439154,"sku":"FRN-R-50","price":174.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3df73dec33455b5f189bc10042427883.jpg?v=1788496364","url":"https:\/\/voomisupply.com\/products\/cooper-bussmann-frn-r-50-rk5-time-delay-fuse-50a","provider":"Voomi Supply","version":"1.0","type":"link"}