{"product_id":"westinghouse-ma3400s-circuit-breaker","title":"Westinghouse | MA3400S | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Westinghouse MA3400S circuit breaker — a precise, dependable solution for protection in demanding electrical systems. With a 400A rating, 3-pole configuration, and a 600V operating range, this unit is built to keep critical circuits safeguarded in industrial and commercial environments where reliability isn’t optional.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles\u003c\/strong\u003e: 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIdeal for\u003c\/strong\u003e: Maintenance, retrofit, and replacement where MA3400S compatibility is required\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility reference\u003c\/strong\u003e: Part number MA3400S is the best reference for ensuring a proper fit\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy the MA3400S stands out for your project\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eDesigned for scenarios where a precise 3-pole, 400A, 600V protection device is specified — making it a straightforward, no-surprise replacement in compatible panels and systems.\u003c\/li\u003e \u003cli\u003eRetrofit-ready performance means you can upgrade aging protection without overhauling your distribution layout or panel family.\u003c\/li\u003e \u003cli\u003eReliable, predictable protection for feeders and downstream circuits in facilities like warehouses, manufacturing floors, and commercial electrical rooms.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eCompatibility and installation notes you can rely on\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFit check\u003c\/strong\u003e: Confirm fit and ratings before ordering. The MA3400S part number is the most reliable compatibility reference for your panel or bus configuration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: Follow applicable electrical codes and the panel manufacturer’s installation guidelines. Use proper lockout\/tagout procedures during service.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpare management\u003c\/strong\u003e: Keep spares in a clean, dry location to preserve performance and longevity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical use cases that illustrate value\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eUpgrading protection in existing facilities where a 400A, 3-pole, 600V breaker is specified, allowing seamless continuity of protection without panel changes.\u003c\/li\u003e \u003cli\u003eReplacing failed or worn breakers in service panels that require the MA3400S for continued compatibility and safety.\u003c\/li\u003e \u003cli\u003eMaintaining robust electrical protection in retrofit projects where minimizing downtime and ensuring correct part reference are priorities.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhat to expect in terms of performance and reliability\u003c\/p\u003e\n\u003cp\u003eWestinghouse delivers consistency in trip behavior and protection across typical operating conditions, helping facilities avoid unexpected outages. The MA3400S is built to integrate smoothly into existing systems that rely on this exact part number for continued, dependable protection.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Westinghouse","offers":[{"title":"Default Title","offer_id":46427175223458,"sku":"MA3400S","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-ma3400s-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}