{"product_id":"westinghouse-mca3400-circuit-breaker","title":"Westinghouse | MCA3400 | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eThe Westinghouse MCA3400 circuit breaker is engineered for demanding 600V power distribution, delivering dependable protection for high-current circuits. With a robust 400A rating across 3 poles, this unit is designed to safeguard main feeders and critical loads in commercial and industrial panels without compromising on performance or reliability.\u003c\/p\u003e \u003cp\u003eDesigned for maintenance, retrofit, and replacement projects where exact specifications matter, the MCA3400 integrates smoothly with Westinghouse-compatible panels and systems that rely on this familiar MCA3400 family design. Its three-pole configuration ensures synchronized protection across all phases, helping to maintain system stability in demanding applications.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\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:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e MCA3400\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cp\u003eWhat sets the MCA3400 apart is its clear emphasis on compatibility and practical field use. The part number MCA3400 is the most reliable reference when matching this breaker to existing panels or replacement stock, reducing the risk of mismatched ratings or mounting styles during retrofit or maintenance. This makes it a practical choice for facilities that require quick, accurate ordering and dependable interchangeability.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacement in commercial or industrial panels that support 3-pole, 600V protection for main feeders\u003c\/li\u003e \u003cli\u003eRetrofit projects upgrading older electrical systems to a standardized 400A, 3-Pole configuration\u003c\/li\u003e \u003cli\u003eMaintenance scenarios where a reliable, field-ready 400A breaker is needed to minimize downtime\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eFit, compatibility, and installation tips\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, confirm the panel’s fit and ratings align with 400A, 3-Pole, and 600V specifications. Since the MCA3400 is keyed to its part number, keeping the packaging or documentation handy greatly simplifies future maintenance or replacements. When installing, verify mounting style and busbar compatibility with existing equipment to ensure a seamless swap and stable electrical connections.\u003c\/p\u003e \u003cp\u003eIdeal for facility managers, electrical contractors, and maintenance teams working in warehouses, manufacturing floors, data centers, and other high-power environments, the Westinghouse MCA3400 provides a clear path to reliable protection, straightforward replacement, and efficient upgrades. By choosing a trusted, compatible 400A, 3-pole 600V breaker, you safeguard uptime and maintain orderly, safe power distribution across demanding workloads.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Westinghouse","offers":[{"title":"Default Title","offer_id":46427173978274,"sku":"MCA3400","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\/westinghouse-mca3400-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}