{"product_id":"littelfuse-flnr350-350a-250v-rk5-time-delay-fuse","title":"Littelfuse FLNR350 350A 250V RK5 Time Delay Fuse","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe LITTELFUSE FLNR350 is a 350-amp, 250-volt, Class RK5 time-delay fuse designed for overcurrent protection in demanding electrical distribution applications. The time-delay characteristic allows the fuse to absorb short-duration inrush currents common during motor startup without nuisance opening, while still providing reliable short-circuit and overload protection. It is installed in fused disconnect switches, motor control panels, and branch-circuit protection equipment. Electricians and maintenance technicians working on commercial and industrial systems specify this fuse type where motor loads and transformer inrush are a factor.\u003c\/p\u003e\n\u003cp\u003eThe FLNR350 fits standard Class RK5 fuse holders and fusible disconnect switches rated for 250 volts AC or less. It is suited for motor branch circuits, feeder circuits, and service entrance protection in commercial and light industrial installations. The RK5 rejection feature prevents substitution of lower-interrupt-rating fuses, supporting code-compliant installations under NEC Article 430 for motor circuits and Article 240 for overcurrent protection.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e350-amp continuous current rating for high-capacity motor and feeder circuits\u003c\/li\u003e\n  \u003cli\u003e250-volt AC maximum voltage rating\u003c\/li\u003e\n  \u003cli\u003eClass RK5 rejection blade construction prevents installation of non-listed substitutes\u003c\/li\u003e\n  \u003cli\u003eTime-delay design tolerates motor inrush and transformer magnetizing currents without nuisance opening\u003c\/li\u003e\n  \u003cli\u003eDual-element construction provides independent response to overloads and short-circuit faults\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement for Class RK5 fuse holders and fusible disconnect switches rated at 250 volts AC, commonly used in motor branch-circuit and feeder-circuit protection 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 NEC and applicable local codes. De-energize and lock out the circuit at the upstream overcurrent device before removing or installing fuses. Verify that the fuse holder is rated for Class RK5 fuses and that the circuit voltage and ampacity do not exceed the fuse ratings. Never replace a time-delay fuse with a fast-acting fuse in motor-circuit applications without engineering review.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCurrent Rating\u003c\/strong\u003e: 350 amps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e: 250 volts AC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuse Class\u003c\/strong\u003e: RK5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResponse Type\u003c\/strong\u003e: Time Delay\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 07945815092\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: LITTELFUSE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: FLNR350\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LITTELFUSE","offers":[{"title":"Default Title","offer_id":51383293542706,"sku":"FLNR350","price":347.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312675428.jpg?v=1782592468","url":"https:\/\/voomisupply.com\/products\/littelfuse-flnr350-350a-250v-rk5-time-delay-fuse","provider":"Voomi Supply","version":"1.0","type":"link"}