{"product_id":"square-d-ma364001021-circuit-breaker","title":"Square D | MA364001021 | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D MA364001021 circuit breaker — a purpose-built protective device for demanding electrical runs. With a 400 A rating across 3 poles and a 600 V operating window, this breaker is designed to safeguard large commercial and light industrial circuits from overcurrent, helping prevent equipment damage and costly downtime.\u003c\/p\u003e \u003cp\u003eThis unit excels as a maintenance, retrofit, or replacement solution where exact spec matching matters. The MA364001021 part number is the best reference for compatibility, ensuring proper fit within Square D panels and downstream protection devices. Before ordering, confirm fit and ratings on your panel label and with your electrical contractor to avoid mismatches.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 400 A — robust protection for heavy loads and large motors.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles\u003c\/strong\u003e: 3-Pole — suited for 3-phase distribution systems common in business facilities.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 600 V — supports standard distribution voltages used in commercial settings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBest use\u003c\/strong\u003e: Maintenance, retrofit, or replacement where a precise, identical part is required.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility\u003c\/strong\u003e: Part number MA364001021 is your key reference for panel suitability; verify against your equipment's labeling and service documentation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical tips for a smooth installation: power down the system following proper lockout\/tagout procedures, verify the panel's rating and the breaker's trip characteristics with the panel's manufacturer data, and ensure correct mounting and secure connections per Square D guidelines. This precise-match breaker helps minimize downtime and ensures reliable, predictable performance across your distribution network.\u003c\/p\u003e \u003cp\u003eInvest with confidence in a genuine Square D replacement that keeps your critical infrastructure protected and running. Add to cart to secure an exact-match MA364001021 that aligns with your 400 A, 3-Pole, 600 V requirements.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426347700386,"sku":"MA364001021","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-ma364001021-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}