{"product_id":"ite-cm3b400-circuit-breaker","title":"ITE | CM3B400 | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eITE CM3B400 Circuit Breaker\u003c\/strong\u003e delivers robust overcurrent protection for three‑phase power systems. With a 400A rating, a 3‑pole configuration, and a 600V operating capacity, this breaker is built for demanding industrial and commercial environments. Designed for maintenance, retrofit, and replacement projects, it helps you keep critical equipment protected while aligning with OEM specifications.\u003c\/p\u003e \u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePole configuration:\u003c\/strong\u003e 3‑Pole (three‑phase protection)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e CM3B400\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRecommended use:\u003c\/strong\u003e Maintenance, retrofit, and replacement where matching specs are required\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy this breaker stands out\u003c\/h2\u003e\n\u003cp\u003eUnlike generic substitutes, the CM3B400 is specifically chosen for compatibility with ITE panel setups and other systems that rely on accurate three‑phase protection. The 3‑pole design ensures simultaneous disconnection across all three phases, reducing the risk of phase imbalance and providing consistent shutdowns during fault conditions. The CM3B400 is identified by its part number, making it the most reliable reference when verifying fit for your panel or equipment.\u003c\/p\u003e \u003ch2\u003eIdeal applications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eIndustrial control panels and motor feeders in manufacturing environments\u003c\/li\u003e \u003cli\u003eLarge HVAC or cooling systems powered by three-phase networks\u003c\/li\u003e \u003cli\u003eRetrofit projects where legacy breakers require precise specs for safe operation\u003c\/li\u003e \u003cli\u003ePrimary or secondary distribution panels in commercial facilities\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eCompatibility and installation guidance\u003c\/h2\u003e\n\u003cp\u003eBefore ordering, confirm fit and ratings to ensure seamless replacement. Use the \u003cstrong\u003eCM3B400\u003c\/strong\u003e part number as the primary compatibility reference with your equipment label or documentation. Follow all standard safety practices when working with energized systems—power should be fully isolated, and only qualified personnel should perform replacements. When integrating into existing panels, verify that the voltage rating and three‑pole configuration match the system requirements and that mounting and wiring configurations align with your panel’s design.\u003c\/p\u003e \u003ch2\u003ePractical tips and considerations\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eUse in applications with three‑phase loads up to 400A to ensure balanced protection across all phases.\u003c\/li\u003e \u003cli\u003ePair with proper panel labeling and documentation to maintain clear maintenance records and code compliance.\u003c\/li\u003e \u003cli\u003eIf frequent tripping occurs, revisit load distribution and motor startup currents to determine if a higher interrupting capacity or surge protection is warranted.\u003c\/li\u003e \u003cli\u003eKeep a reference spare on hand for quick maintenance or retrofit cycles to minimize downtime.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"ITE","offers":[{"title":"Default Title","offer_id":46427191214242,"sku":"CM3B400","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a0994f42-7fad-49d1-911a-c2784022b8c9.png?v=1765492979","url":"https:\/\/www.ampstate.com\/products\/ite-cm3b400-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}