{"product_id":"eaton-hmcp400j5-400a-600v-3-pole-circuit-breaker","title":"Eaton HMCP400J5 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Eaton HMCP400J5 — a 400A, 600V, 3-pole molded case circuit breaker engineered for dependable branch circuit overcurrent protection and fast short-circuit interruption in panelboards and load centers. Designed to deliver consistent protection in demanding environments, it combines a compact footprint with robust performance to optimize panel space without compromising safety.\u003c\/p\u003e \u003cp\u003eIn practical terms, this breaker helps you keep electrical systems safe and uptime high across a range of applications. Its compact molded-case design frees panel space, making it easier to wire and organize typical commercial or industrial panels. The thermal-magnetic trip unit provides stable, repeatable protection across temperature variations and load conditions, reducing nuisance trips while ensuring swift interruption when faults occur. The 3-pole configuration is ideal for three-phase circuits, providing coordinated protection across all phases in commercial and light-industrial settings.\u003c\/p\u003e \u003ch3\u003eKey features that matter in the field\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded-case design\u003c\/strong\u003e maximizes panel efficiency and simplifies installation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers reliable protection with consistent trip characteristics under varying loads.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration\u003c\/strong\u003e supports three-phase systems, ensuring coordinated fault protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e400A, 600V rating\u003c\/strong\u003e suitable for high-current feeders and demanding equipment while maintaining fast fault interruption.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e pairs with matching Eaton OEM loadcenters and panelboards for straightforward, drop-in replacement.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal uses and scenarios\u003c\/h3\u003e\n\u003cp\u003eUse the HMCP400J5 as a main feeder or branch-circuit protector in three-phase panelboards, service equipment, or industrial control panels. It’s well-suited for data centers, manufacturing facilities, and commercial spaces with heavy electrical loads where reliable protection and rapid fault isolation are essential. If you’re upgrading or retrofitting panels, this breaker’s OEM compatibility helps maintain system integrity and continuity.\u003c\/p\u003e \u003ch3\u003eWho benefits most\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eElectrical contractors installing or upgrading commercial or light-industrial panelboards.\u003c\/li\u003e \u003cli\u003eFacility managers and maintenance teams needing dependable, easy-to-replace protection for high-demand circuits.\u003c\/li\u003e \u003cli\u003eSpecifiers seeking a proven, compatible solution for 3-phase distribution and feeder protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical considerations for optimal performance\u003c\/h3\u003e\n\u003cp\u003eAlways confirm panelboard compatibility with the HMCP400J5 and use the appropriate OEM-compatible load center. Follow standard wiring practices and Eaton’s installation guidelines for torque and connection sequencing. Regular inspections can help spot overheating, wear, or signs of aging in breakers and panels, ensuring continued protection and reliability.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eChoose the Eaton HMCP400J5 for space-efficient, reliable three-pole protection that keeps high-demand panels safe and running smoothly.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349611040930,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton_breaker_and_panels_dd63ee20-a904-48a8-8bf7-315b34136dc9.png?v=1764151270","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400j5-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}