{"product_id":"bussmann-frn-r-450-450-amp-450a-250v-fusetron-dual-element-time-delay-current-limiting-class-rk5-fuse-ul-listed","title":"Bussmann FRN-R-450, 450 Amp (450A) 250V Fusetron Dual Element Time-Delay Current Limiting Class RK5 Fuse, UL Listed","description":"\u003cp\u003e\u003cb\u003ePartNumber:\u003c\/b\u003e FRN-R-450\u003c\/p\u003e\u003cp\u003e\u003cb\u003eDetails:\u003c\/b\u003e These 250VAC UL Class RK5 fuses are time delay and nonindicating. They tolerate temporary inrush currents without opening, which prevents nuisance-blowing from motor and equipment startups. Also called slow-blow Class RK5 fuses, these 200kA IR fuses open to disconnect an electrical circuit when exposed to sustained loads and short circuits. They have no indicator for identifying a blown fuse, so they're sometimes used with an indicating fuse block or cover.UL Class RK5 fuses provide moderate current limitation for general use applications where more current-limiting RK1 fuses aren't needed. These 250VAC or 600VAC fuses have an interrupting rating (IR) of 200kA and are the same size as Class H and K fuses, but have a rejection feature that prevents an accidental downgrade from a current-limiting system. Their modified terminals ensure a match with the rejection clips in Class R fuse holders that prevent the installation of fuses with a lower interrupting capacity. They're typically used in newer equipment, but can also be used with a Class H fuse holder to upgrade older installations from Class H or K fuses for improved overcurrent protection. They are current-limiting to prevent electrical damage by disconnecting circuits before they're exposed to the full magnitude and duration of an overcurrent. Fuse, Class RK5, 450A, FRN-R Series\u003c\/p\u003e\u003cp\u003e\u003cb\u003eUPC:\u003c\/b\u003e 631908880120\u003c\/p\u003e\u003cp\u003e\u003cb\u003eEAN:\u003c\/b\u003e 0631908880120\u003c\/p\u003e\u003cp\u003e\u003cb\u003eModel:\u003c\/b\u003e FRN-R-450\u003c\/p\u003e\u003cp\u003e\u003cb\u003eItem Condition:\u003c\/b\u003e New\u003c\/p\u003e","brand":"Electrical Products Sales Store","offers":[{"title":"Default Title","offer_id":40281454280790,"sku":"B1-CIEV-7LZU","price":75.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0247\/9452\/9878\/products\/31za8eHj0dL.jpg?v=1694224772","url":"https:\/\/electrical-products-store.myshopify.com\/products\/bussmann-frn-r-450-450-amp-450a-250v-fusetron-dual-element-time-delay-current-limiting-class-rk5-fuse-ul-listed","provider":"Electrical Products Sales Store ","version":"1.0","type":"link"}