{"product_id":"merit-brass-a2d250r-250v-rk1-time-delay-fuse-250a","title":"Merit Brass A2D250R 250V RK1 Time-delay Fuse 250A","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MERIT BRASS A2D250R is a 250-volt, Class RK1 time-delay fuse rated for high-current protection in demanding electrical systems. Time-delay fuses of this class allow brief inrush currents during motor startup while still providing fast, reliable protection against sustained overloads and short circuits. The RK1 classification indicates a rejection-style cartridge design that prevents accidental substitution with lower-rated fuse classes, adding an important layer of circuit safety. This fuse is installed by licensed electricians and maintenance electricians working on industrial, commercial, and heavy-duty residential electrical panels and motor branch circuits.\u003c\/p\u003e\n\u003cp\u003eClass RK1 time-delay fuses are commonly used in motor control centers, disconnect switches, and panelboards where motor loads require inrush tolerance without sacrificing overcurrent protection. At 250 volts, this fuse is appropriate for single-phase and three-phase circuits within that voltage range. The rejection-slot cartridge body ensures it can only be installed in RK1-rated fuse holders, reducing the risk of improper substitution during service calls and routine maintenance.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eClass RK1 rejection-style cartridge prevents substitution with lower-rated fuse classes\u003c\/li\u003e\n  \u003cli\u003eTime-delay design tolerates motor inrush current while protecting against sustained overloads\u003c\/li\u003e\n  \u003cli\u003eRated for 250-volt circuits in single-phase and three-phase applications\u003c\/li\u003e\n  \u003cli\u003ePackaged individually for straightforward single-fuse replacement jobs\u003c\/li\u003e\n  \u003cli\u003eCompact cartridge form factor fits standard RK1 fuse holders and disconnect switches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement for Class RK1 fuse holders and disconnect switches rated at 250 volts in commercial and industrial electrical systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation must be performed by a qualified, licensed electrician in accordance with the National Electrical Code (NEC). Always de-energize and lock out the circuit at the upstream disconnect before removing or installing any fuse. Verify that the fuse holder is rated for Class RK1 cartridges before installation. Never bypass or substitute a lower-class fuse in an RK1-rated holder.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e: 250 volts\u003c\/li\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: Time-Delay\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1 per pack\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (L x W x H)\u003c\/strong\u003e: 8.810 inches x 2.120 inches x 2.120 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.010 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 78200199112\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: MERIT BRASS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: A2D250R\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MERIT BRASS","offers":[{"title":"Default Title","offer_id":51384023023922,"sku":"A2D250R","price":498.37,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312678643.jpg?v=1782615151","url":"https:\/\/voomisupply.com\/products\/merit-brass-a2d250r-250v-rk1-time-delay-fuse-250a","provider":"Voomi Supply","version":"1.0","type":"link"}