{"product_id":"njl424300-circuit-breaker","title":"NJL424300 | Circuit Breaker | 300A | 2-Pole | 480V","description":"\u003cdiv\u003e\n\u003cp\u003ePower protection you can trust for demanding 480V environments—the NJL424300 is a 300A, 2-pole industrial circuit breaker built for reliability and easy integration into existing power systems. Designed for maintenance, retrofit, and replacement projects where exact specifications matter, this unit ensures consistent protection without forcing major panel changes.\u003c\/p\u003e \u003cp\u003eKey specifications and compatibility at a glance:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 300A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 480V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number reference:\u003c\/strong\u003e NJL424300 (the best reference for compatibility)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptimal use cases:\u003c\/strong\u003e maintenance, retrofit, and replacement where matching specs are required\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this breaker stands out\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePrecise compatibility with 480V systems:\u003c\/strong\u003e Designed to protect and isolate heavy industrial loads in facilities such as manufacturing lines, process equipment, and large motor circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFast, safe downtime recovery:\u003c\/strong\u003e A robust, field-proven design that helps minimize unplanned outages during maintenance windows or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear reference for procurement:\u003c\/strong\u003e Using the NJL424300 part number ensures you’re ordering the exact device that matches your panel’s trip curves and mounting interface.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal use scenarios\u003c\/p\u003e \u003cul\u003e \u003cli\u003eFactory floor motor feeders and main distribution panels powered by 480V systems\u003c\/li\u003e \u003cli\u003eRetrofit projects where existing breakers require precise 300A, 2-pole, 480V specifications\u003c\/li\u003e \u003cli\u003eMaintenance and replacement of aging protection devices to restore protective coordination and reliability\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical procurement and installation tips\u003c\/p\u003e \u003cul\u003e \u003cli\u003eAlways \u003cstrong\u003econfirm fit and ratings\u003c\/strong\u003e before ordering—the NJL424300 part number is your best reference for compatibility with your panel and bus configuration.\u003c\/li\u003e \u003cli\u003eCheck the panel's compatible interrupting rating and ensure the breaker’s trip curve aligns with your protective coordination plan.\u003c\/li\u003e \u003cli\u003ePrepare a simple cross-reference log when replacing similar devices to document any minor routine differences and ensure traceability for future maintenance visits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhen you need a dependable, spec-accurate replacement for 480V applications, the NJL424300 delivers the protection you rely on—order with confidence and reference the exact part number for a precise fit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46427137310882,"sku":"NJL424300","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/njl424300-circuit-breaker-300a-2-pole-480v-269.webp?v=1789674858","url":"https:\/\/www.ampstate.com\/products\/njl424300-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}