{"product_id":"square-d-maf36400-circuit-breaker","title":"Square D | MAF36400 | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D MAF36400 is a robust 400A, 3-pole circuit breaker designed for demanding electrical environments. Engineered for maintenance, retrofit, and replacement projects, this unit helps you maintain reliable protection in medium- to high-power systems where precise matching of specs matters.\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\u003eReference:\u003c\/strong\u003e Part number MAF36400 serves as the best compatibility reference.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Ideal for upgrade, service, or replacement tasks where exact spec alignment is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhat makes the MAF36400 stand out\u003c\/h2\u003e\n\u003cp\u003eIn industrial and commercial panels, reliable interruption at the exact current and configuration is essential. The MAF36400 delivers a precise 400A capacity across three phases, enabling synchronized protection for multi-phase circuits at voltages up to 600V. Because it’s a genuine Square D component identified by the exact part number, you gain confidence that it will drop into the same footprint, wiring scheme, and electrical characteristics as the original device.\u003c\/p\u003e \u003cp\u003eKey benefits include:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eExact-match compatibility:\u003c\/strong\u003e Use the MAF36400 part number to verify fit and ratings before ordering, ensuring seamless replacement without modification.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-phase protection:\u003c\/strong\u003e The 3-pole design provides balanced interruption across all phases, helping minimize fault conditions and protect downstream equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-voltage readiness:\u003c\/strong\u003e Rated for systems up to 600V, suitable for a wide range of industrial and commercial installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaintenance-friendly retrofit:\u003c\/strong\u003e Designed to slot into established panels where a like-for-like replacement is required, reducing downtime and project risk.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWho's this for and how you’ll use it\u003c\/h2\u003e\n\u003cp\u003eThis breaker is ideal for facilities managers, electrical contractors, and maintenance teams overseeing three-phase electrical distributions in warehouses, manufacturing floors, and large commercial buildings. Use cases include:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eUpgrading aging protection in a legacy panel to restore reliable fault interruption.\u003c\/li\u003e \u003cli\u003eReplacing a failed 400A, 3-pole 600V breaker with an exact spec match to minimize compatibility issues.\u003c\/li\u003e \u003cli\u003eRetrofit projects where maintaining the original electrical architecture is critical for safety and compliance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eBefore you order, confirm fit and ratings against your panel’s manufacturer documentation. The MAF36400 part number is the most reliable reference for compatibility, helping you avoid mismatches and ensure a smooth installation process.\u003c\/p\u003e \u003cp\u003eTrust in a purpose-built Square D solution that emphasizes precise specs, dependable protection, and a straightforward path to reliable three-phase circuit interruption.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426402095266,"sku":"MAF36400","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-maf36400-circuit-breaker-400a-3-pole-600v-656.webp?v=1789570497","url":"https:\/\/www.ampstate.com\/products\/square-d-maf36400-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}