{"product_id":"siemens-njg3b400l-400a-3p-480v-circuit-breaker","title":"Siemens NJG3B400L 400A 3P 480V Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSiemens NJG3B400L 400A 3P 480V Circuit Breaker\u003c\/strong\u003e from AmpState delivers reliable, heavy-duty protection for industrial and commercial electrical distributions. Built for panelboards, load centers, and wide-ranging distribution applications, this Siemens breaker is a trusted choice when uptime and safety matter as much as performance.\u003c\/p\u003e \u003ch2\u003eWhy this circuit breaker stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-capacity, three-phase protection\u003c\/strong\u003e — 400 A rating across three poles is ideal for demanding three-phase circuits, feeders, and equipment racks in commercial facilities, manufacturing lines, and data-center infrastructures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e400A, 3P, 480V capability\u003c\/strong\u003e — Designed to integrate with standard 480V distribution schemes, ensuring seamless operation in mid-to-large scale electrical environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaintains compatibility through parts-based maintenance\u003c\/strong\u003e — This NJG3B400L part number is a dependable choice when retrofit work or service planning requires keeping the same component identity for easy stocking and replacement.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProven Siemens reliability\u003c\/strong\u003e — Backed by Siemens engineering and manufacturing standards, delivering consistent performance in protective applications across panelboards and distribution boards.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAvailable from AmpState\u003c\/strong\u003e — A trusted source for genuine Siemens breakers, with support to help you confirm fit and ensure you’re selecting the right part for your panel.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal use cases\u003c\/h2\u003e\n\u003cp\u003eUse the NJG3B400L for aggressive protection in:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003ePanelboards and load centers powering large commercial spaces, workshops, and data centers.\u003c\/li\u003e \u003cli\u003eIndustrial distribution where three-phase circuits require solid overcurrent protection at 480V systems.\u003c\/li\u003e \u003cli\u003e retrofit projects where maintaining a consistent part number simplifies procurement, documentation, and maintenance calendars.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhat to expect in practice\u003c\/h2\u003e\n\u003cp\u003eBeyond the basic specs, this circuit breaker supports practical, real-world needs:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eOperational confidence\u003c\/strong\u003e from a device designed for continuous service in demanding environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e streamlined maintenance planning\u003c\/strong\u003e by keeping the part number stable across replacements, reducing confusion during outages or scheduled downtime.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear sourcing path\u003c\/strong\u003e through AmpState, with guidance available to verify compatibility before purchase.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eKey technical specifications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer\u003c\/strong\u003e: Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number\u003c\/strong\u003e: NJG3B400L\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles\u003c\/strong\u003e: 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 480 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplications\u003c\/strong\u003e: Circuit protection for panelboards, load centers, and electrical distribution\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eNeed help with fit?\u003c\/h2\u003e\n\u003cp\u003eIf you’re unsure about compatibility or how the NJG3B400L will integrate with your specific Siemens panels, we’re here to help. \u003cstrong\u003eMessage us\u003c\/strong\u003e and we’ll assist you in confirming fit and ensuring you’ve chosen the right part for your system.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46413722288290,"sku":"NJG3B400L","price":18821.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-njg3b400l-400a-3p-480v-circuit-breaker-ampstate-breakers-209.webp?v=1789089634","url":"https:\/\/www.ampstate.com\/products\/siemens-njg3b400l-400a-3p-480v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}