{"product_id":"merit-brass-a6d400r-600v-rk1-time-delay-fuse-400a","title":"Merit Brass A6D400R 600V RK1 Time-delay Fuse 400A","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MERIT BRASS A6D400R is a Class RK1 time-delay fuse rated for 600 volts and 400 amps. It provides overcurrent protection with a time-delay characteristic that allows temporary inrush currents, such as those produced by motor starts and transformer energizing, to pass without nuisance tripping. The Class RK1 designation indicates a high degree of current-limiting performance, offering superior protection for downstream equipment compared to standard Class K fuses. Licensed electricians and industrial maintenance technicians install this fuse in motor branch circuits, feeder panels, and control panels where both overcurrent and short-circuit protection are required.\u003c\/p\u003e\n\u003cp\u003eThis fuse is suited for commercial and industrial electrical systems operating at up to 600 volts AC. Typical applications include motor control centers, distribution panels, and equipment panels where inrush-tolerant, current-limiting protection is needed. The time-delay feature makes it appropriate for circuits with high starting currents, including HVAC compressor circuits, pump motors, and industrial drive systems. It ships one fuse per pack.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e600-volt AC voltage rating for commercial and industrial service\u003c\/li\u003e\n  \u003cli\u003e400-amp continuous current rating\u003c\/li\u003e\n  \u003cli\u003eClass RK1 current-limiting design provides enhanced downstream equipment protection\u003c\/li\u003e\n  \u003cli\u003eTime-delay characteristic tolerates motor and transformer inrush without nuisance tripping\u003c\/li\u003e\n  \u003cli\u003eOne fuse per pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement for Class RK1 time-delay fuses used in 600-volt industrial and commercial electrical distribution and motor branch-circuit applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC). Always de-energize and lock out the circuit before removing or installing a fuse. Verify that the fuse holder or disconnect is rated for Class RK1 fuses at 600 volts and 400 amps before installation. Do not substitute a fuse of a different class or higher ampere rating than specified by the equipment manufacturer.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e: 600 volts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmpere Rating\u003c\/strong\u003e: 400 amps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuse Class\u003c\/strong\u003e: RK1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Time-Delay\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (L x W x H)\u003c\/strong\u003e: 11.750 inches x 2.620 inches x 2.620 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3.570 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity per Pack\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 78200199225\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: A6D400R\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MERIT BRASS","offers":[{"title":"Default Title","offer_id":51383686103346,"sku":"A6D400R","price":907.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312678697.jpg?v=1782604369","url":"https:\/\/voomisupply.com\/products\/merit-brass-a6d400r-600v-rk1-time-delay-fuse-400a","provider":"Voomi Supply","version":"1.0","type":"link"}