{"product_id":"square-d-ma264001021-circuit-breaker","title":"Square D | MA264001021 | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eProtect demanding electrical loads with the Square D MA264001021 Circuit Breaker — a robust 400 A, 3-Pole device rated for 600 V. Engineered for maintenance, retrofit, and replacement tasks, this breaker delivers dependable protection where exact specifications matter, helping keep critical circuits safe and uninterrupted.\u003c\/p\u003e \u003cp\u003eWhy this model stands out is its precise compatibility. The MA264001021 part number is the clearest reference for matching your existing Square D installation, enabling a straightforward swap-in when you’re upgrading or replacing worn or outdated components. Built to handle large feeder circuits, this three-pole design ensures balanced protection across multi-phase systems.\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 rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e MA264001021\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Circuit Breaker suitable for Square D panels and compatible environments\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance on existing Square D distributions where a 400 A, 3-pole, 600 V breaker is required\u003c\/li\u003e \u003cli\u003eRetrofit projects upgrading feeder protection to a higher-capacity, multi-pole solution\u003c\/li\u003e \u003cli\u003eReplacement of worn or failed breakers in large-scale electrical installations that operate at 600 V\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eHow to verify fit\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, confirm that your equipment matches the exact specifications: 400 A capacity, 3-pole configuration, and 600 V rating. The MA264001021 part number is the most reliable reference for compatibility, ensuring a seamless fit with your existing Square D hardware and panel labeling.\u003c\/p\u003e \u003ch3\u003eInstallation considerations\u003c\/h3\u003e\n\u003cp\u003eWhen installing, follow standard electrical safety practices and ensure you’re working with a panel that supports a 3-pole, 600 V protection device. For professional results, rely on a licensed electrician to verify circuit ratings, torque requirements, and proper panel compatibility.\u003c\/p\u003e \u003cp\u003eChoose the Square D MA264001021 circuit breaker for reliable, high-capacity protection in industrial and commercial electrical systems, backed by a part-number-for-compatibility approach that simplifies maintenance, retrofit, and replacement projects.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426394919074,"sku":"MA264001021","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/square-d-ma264001021-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}