{"product_id":"schneider-electric-nsj400h-circuit-breaker","title":"Schneider Electric | NSJ400H | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Schneider Electric NSJ400H circuit breaker—a robust, bolt-on 3-pole device designed for demanding electrical distribution tasks. With a 400 A rating and a 600 V maximum, it’s built to protect large circuits in industrial and commercial settings while simplifying field work through a straightforward bolt-on installation.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications at a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e NSJ400H\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy this NSJ400H stands out\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-On mounting for efficient field installations\u003c\/strong\u003e—designed to attach quickly to compatible panels, reducing installation time and mechanical modification requirements compared to clip-on or plug-in designs.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole protection\u003c\/strong\u003e—integrates seamlessly into three-phase systems, providing coordinated protection across all phases and helping maintain system stability in demanding applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTrusted Schneider Electric reliability\u003c\/strong\u003e—a legacy of safety and performance in electrical distribution, backed by a brand known for compatibility with a broad ecosystem of panels, accessories, and upstream protection components.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDirect compatibility reference\u003c\/strong\u003e—when replacing or retrofitting, the NSJ400H part number is the most reliable guide to ensure you’re selecting a true spec-match for your equipment and panel design.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIdeal use scenarios\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eMaintenance and retrofit projects\u003c\/strong\u003e—swap in this bolt-on breaker where an exact 400 A, 3-pole, 600 V spec-match is required to restore protection in aging or updated switchgear.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNew installations in compatible panels\u003c\/strong\u003e—suitable for installation in systems that support bolt-on breakers with the NSJ400H form factor and dimensions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReplacement where downtime matters\u003c\/strong\u003e—the bolt-on design can shorten turnaround times for field replacements, helping minimize outage windows while preserving system protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePractical considerations for a successful fit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eVerify fit and ratings before ordering\u003c\/strong\u003e—use the NSJ400H part number as your primary compatibility reference to ensure the device matches your panel and bus arrangement.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePanel compatibility\u003c\/strong\u003e—confirm that your enclosure or switchboard supports bolt-on breakers of this form factor and that mounting hardware is appropriate for your specific model.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eElectrical alignment\u003c\/strong\u003e—ensure your system voltage and phase configuration align with the 600 V rating and 3-pole arrangement to maintain proper protection and coordination.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eOperational tips to maximize value\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003ePlan replacements during routine maintenance windows to align with other panel tasks and minimize disruption.\u003c\/li\u003e \u003cli\u003eKeep the NSJ400H as a reference part number when ordering spare or replacement units to preserve consistency across fleets of equipment.\u003c\/li\u003e \u003cli\u003eStore spare bolt-on breakers in a clean, dry environment to prevent corrosion or mounting issues when installation is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIn environments where robust three-phase protection and reliable, serviceable components matter, the Schneider Electric NSJ400H offers a precise, spec-matched solution. Its bolt-on design, combined with a solid 400 A capacity and 600 V rating, makes it a practical choice for retrofit, maintenance, and replacement projects that demand exact compatibility and durable performance without unnecessary downtime.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Schneider Electric","offers":[{"title":"Default Title","offer_id":46427239415970,"sku":"NSJ400H","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_ad06fdd7-931c-4a09-bfbe-d05329579cd6.png?v=1765492978","url":"https:\/\/www.ampstate.com\/products\/schneider-electric-nsj400h-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}