{"product_id":"eaton-504c743g09-circuit-breaker","title":"Eaton | 504C743G09 | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Eaton 504C743G09 Circuit Breaker—engineered for reliability in demanding electrical environments. With a robust 400A rating, a three-pole configuration, and a 600V maximum, this unit is purpose-built to protect main feeders and distribution panels from overcurrent events while keeping downtime to a minimum.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\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\u003ePart reference\u003c\/strong\u003e: 504C743G09 — use this number as the best compatibility reference\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFit and availability\u003c\/strong\u003e: Confirm fit and ratings before ordering to ensure it matches your panel and service conditions\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Eaton breaker stands out\u003c\/h3\u003e\n\u003cp\u003eDesigned for maintenance, retrofit, and replacement projects, the 504C743G09 provides seamless integration where exact specifications are required. Its three-pole design supports balanced protection across all phases in three-phase systems, helping to safeguard equipment, wiring, and connected loads from faults. This is a practical, long-term solution for facilities that demand dependable interruption performance without sacrificing compatibility with existing Eaton or compatible panels.\u003c\/p\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance work on aging or upgraded electrical systems that require a like-for-like 400A, 3-pole, 600V breaker\u003c\/li\u003e \u003cli\u003eRetrofit projects where panel configurations must match precise Eaton specifications\u003c\/li\u003e \u003cli\u003eReplacement in industrial or commercial setups that rely on Eaton’s reliability and coordinated protection strategy\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical tips for ensuring a smooth upgrade\u003c\/h3\u003e\n\u003cp\u003eStart with the part number—504C743G09 is the best compatibility reference. Always verify your panel’s ratings and form factor match the 400A, 3-Pole, 600V profile before purchasing. If you’re replacing an older unit, compare the current breaker’s physical footprint and bus connection layout to confirm a straightforward swap, minimizing downtime and avoiding fit issues.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eaton","offers":[{"title":"Default Title","offer_id":46427306000546,"sku":"504C743G09","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_ad06fdd7-931c-4a09-bfbe-d05329579cd6.png?v=1765492978","url":"https:\/\/www.ampstate.com\/products\/eaton-504c743g09-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}