{"product_id":"mersen-a2k90r-rk1-time-delay-fuse-90a-250v","title":"Mersen A2K90R RK1 Time-delay Fuse 90A 250V","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MERSEN A2K90R is a Class RK1 time-delay fuse rated at 90 amps and 250 volts. Class RK1 fuses provide superior current-limiting protection compared to standard Class K fuses, making them a preferred choice for motor branch circuits, HVAC equipment, and industrial load centers that require both overload and short-circuit protection. The time-delay characteristic allows the fuse to ride through harmless inrush currents while still opening quickly on damaging fault conditions. Licensed electricians and HVAC technicians install this fuse type as a code-compliant, high-performance protective device in commercial and residential electrical panels.\u003c\/p\u003e\n\u003cp\u003eThe A2K90R is suited for use in motor circuits, compressor circuits, and other inductive loads where nuisance tripping must be minimized without sacrificing fault protection. Its Class RK1 rejection feature prevents the installation of lower-rated fuse classes in the same fuseholder, enforcing the intended protection level at the panelboard. Typical applications include rooftop HVAC units, air compressors, pumps, and other motor-driven equipment operating on 250-volt single-phase or three-phase systems.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eClass RK1 current-limiting design provides superior short-circuit protection over standard Class K fuses\u003c\/li\u003e\n  \u003cli\u003eTime-delay action accommodates motor and compressor inrush currents without nuisance opening\u003c\/li\u003e\n  \u003cli\u003eRejection feature prevents substitution of lower-performance fuse classes in the same holder\u003c\/li\u003e\n  \u003cli\u003eRated 90 amps at 250 volts for branch-circuit motor and HVAC applications\u003c\/li\u003e\n  \u003cli\u003eSuitable for both single-phase and three-phase 250-volt circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or upgrade for Class RK1 fusible disconnect and panelboard applications rated at 250 volts and 90 amps.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should 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 fuses. Use properly rated fuseholders that accept Class RK1 rejection fuses. Do not substitute a lower-rated fuse class or a higher ampere rating for this device.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmpere Rating\u003c\/strong\u003e: 90 amps\u003c\/li\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\u003eUPC\u003c\/strong\u003e: 78200191521\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: MERSEN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: A2K90R\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MERSEN","offers":[{"title":"Default Title","offer_id":51383361077554,"sku":"A2K90R","price":357.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312677957.jpg?v=1782594501","url":"https:\/\/voomisupply.com\/products\/mersen-a2k90r-rk1-time-delay-fuse-90a-250v","provider":"Voomi Supply","version":"1.0","type":"link"}