{"product_id":"square-d-ma366001021-circuit-breaker","title":"Square D | MA366001021 | Circuit Breaker | 600A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D MA366001021 circuit breaker—a robust 600A, 3-pole protection device designed for demanding electrical systems. Built for maintenance, retrofit, and replacement projects where exact specifications matter, this unit slots into compatible Square D panel boards with precision, helping you keep critical electrical infrastructure running smoothly.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 600A\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\n\u003c\/ul\u003e \u003ch3\u003eWhy this model stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eThree-phase protection:\u003c\/strong\u003e The 3-pole design safeguards all phases in typical 3-phase systems, promoting balanced load and reliable circuit interruption when needed.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWide voltage compatibility:\u003c\/strong\u003e With a 600V rating, this breaker suits a broad range of industrial and commercial distribution networks.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePrecise compatibility reference:\u003c\/strong\u003e The part number MA366001021 is your best reference for ensuring a correct fit and alignment with existing Square D equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEfficient maintenance and replacements:\u003c\/strong\u003e Designed for retrofit and replacement scenarios, it helps minimize downtime when upgrading or repairing panel boards.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance or refurbishment of Square D panel boards that require a 600A, 3-pole, 600V breaker.\u003c\/li\u003e \u003cli\u003eRetrofit projects where current loads demand higher-capacity, reliable protection.\u003c\/li\u003e \u003cli\u003eReplacement in industrial control panels, motor control centers, and commercial electrical distributions that rely on solid, consistent three-phase protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and compatibility notes\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, verify fit and ratings against your panel labeling. The MA366001021 reference is the most reliable indicator of compatibility to prevent mismatched trip characteristics or mounting geometry. When installing, adhere to standard electrical safety practices and follow the manufacturer’s guidelines for installation and clearance.\u003c\/p\u003e \u003ch3\u003eWhat you gain\u003c\/h3\u003e\n\u003cp\u003eConsistent, dependable protection for critical 3-phase circuits operating up to 600V, with a straightforward pathway for maintenance, retrofits, and replacements. This Square D breaker is purpose-built for professionals who prioritize precise specifications and reliable performance in demanding electrical environments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426347176098,"sku":"MA366001021","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-ma366001021-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}