{"product_id":"square-d-ma364001121-circuit-breaker","title":"Square D | MA364001121 | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered for high-demand power distribution, the Square D MA364001121 400A 3-Pole 600V Circuit Breaker is built to handle demanding maintenance, retrofit, and replacement scenarios where exact specifications and dependable protection matter most. This 3-pole design is ideal for three-phase electrical systems, delivering reliable interruption when faults occur and helping safeguard both equipment and personnel.\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\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cp\u003eWhen you’re upgrading or replacing components in a live system, compatibility is everything. This MA364001121 model from Square D is purpose-built for situations where a precise 400A, 3-pole, 600V specification is required. Its design supports timely maintenance, retrofits, and replacements, helping you restore protection quickly without overhauling your panel architecture.\u003c\/p\u003e \u003ch3\u003eUse cases and ideal applications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eHigh-capacity service panels in industrial facilities that run three-phase equipment and machinery\u003c\/li\u003e \u003cli\u003eRetrofits to upgrade existing electrical infrastructure to higher amperage or to restore original protection levels\u003c\/li\u003e \u003cli\u003eMaintenance replacements in commercial and manufacturing environments where panel compatibility is dictated by the part number\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical guidance for compatibility\u003c\/h3\u003e\n\u003cp\u003eNotes: Confirm fit and ratings before ordering. Part number is the best reference for compatibility. Use the MA364001121 as the primary comparison point when matching to your panel label and existing MCCB configurations to minimize downtime and ensure seamless protection.\u003c\/p\u003e \u003ch3\u003eWhat to expect in real-world use\u003c\/h3\u003e\n\u003cp\u003eIn installations that demand robust, reliable fault isolation for three-phase feeders, this breaker provides a clear path to restore service after a trip, helping reduce unplanned downtime. It’s especially suited for facilities undergoing service upgrades, panel refurbishments, or replacements where maintaining exact electrical specifications is critical for system safety and performance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426347667618,"sku":"MA364001121","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-ma364001121-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}