{"product_id":"bussmann-frn-r-50a-fuse-time-delay-cartridge-250v-ir-200ka-125vdc-and-ir-20ka-2-pack","title":"Bussmann FRN-R 50A Fuse – Time-Delay Cartridge, 250V, IR 200kA\/125Vdc and IR 20kA, 2-Pack","description":"\u003cp\u003eThe Bussmann FRN-R 50A fuse is built for robust motor and main panel protection in industrial and commercial settings. This heavy-duty, time-delay cartridge fuse is designed to tolerate momentary startup surges while guarding circuits against longer overloads, helping you maintain smoother operation and reduce unscheduled downtime.\u003c\/p\u003e\n\n\u003cp\u003eWith a dual-element design, the FRN-R can open quickly under short-circuit conditions—as fast as 0.004 seconds—while still permitting brief overloads to pass during startup. The device carries UL Listing as Class R with an impressive short-circuit current rating (IR 200 kA). The end cap groove or knife blade notch makes it compatible with Class H, Class K, and Class R fuse blocks, enabling flexible integration into existing panels. These features pair with ratings suited for a wide range of applications where higher amp or volt ratings are required.\u003c\/p\u003e\n\n\u003ch3\u003eKey advantages\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeavy-duty time-delay protection for motors and main panels\u003c\/li\u003e\n\u003cli\u003eHelps prevent motor burnout from overloads and single-phasing on three-phase systems\u003c\/li\u003e\n\u003cli\u003eDual-element design provides strong short-circuit protection alongside overload tolerance\u003c\/li\u003e\n\u003cli\u003eGeneral purpose vs heavy-duty variants allow use in lighting, heating, and motor circuits\u003c\/li\u003e\n\u003cli\u003eMotor overload and short-circuit protection in a compact cartridge fuse\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal uses and installation notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIndustrial equipment, conveyors, pumps, and HVAC systems where motors require surge tolerance\u003c\/li\u003e\n\u003cli\u003eControl panels and branch circuits in commercial facilities needing reliable protection and selective coordination\u003c\/li\u003e\n\u003cli\u003eResidential and light-commercial settings that involve motors and higher amp circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWhat’s in the retail pack? A two-piece package that provides ready-to-use protection for replacements or stocking up for maintenance. The FRN-R series supports voltages up to 600Vac and can be found in a range of sizes and amp ratings to fit diverse equipment needs. When sizing, consider the motor or circuit load and the intended startup behavior to balance protection with uninterrupted operation.\u003c\/p\u003e\n\n\u003ch3\u003eUsage considerations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eChoose the heavy-duty time-delay variant to accommodate brief motor overloads and startup surges\u003c\/li\u003e\n\u003cli\u003eConfirm compatibility with Class R fuse blocks, and ensure proper mounting for reliable coordination\u003c\/li\u003e\n\u003cli\u003eVerify amp rating aligns with the specific motor or circuit load to balance protection and performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What applications is the Bussmann FRN-R 50A fuse suited for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Ideal for motor protection in panels and machinery, guarding against overloads and single-phasing in three-phase systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What are the standout design features of the FRN-R fuse?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Time-delay operation and dual-element construction, UL Class R listing, and compatibility with common fuse blocks.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Bussmann","offers":[{"title":"Default Title","offer_id":53087335186543,"sku":"B00004WA2Z","price":20.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0598\/3087\/files\/bussmann-frn-r-50a-fuse-end-cap.jpg?v=1778653886","url":"https:\/\/taskholt.com\/products\/bussmann-frn-r-50a-fuse-time-delay-cartridge-250v-ir-200ka-125vdc-and-ir-20ka-2-pack","provider":"TaskHolt","version":"1.0","type":"link"}