{"product_id":"eaton-hmcp400k5x-400a-600v-3-pole-circuit-breaker","title":"Eaton HMCP400K5X - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eDesigned for dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers, the Eaton HMCP400K5X is a 400 A, 600 V, 3-pole molded case circuit breaker built to perform in demanding residential, commercial, and light industrial environments. Its compact footprint makes efficient use of panel space, while delivering robust protection where it’s most needed.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSpace-efficient molded case design:\u003c\/strong\u003e A compact form factor that helps maximize panel capacity without sacrificing protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e Delivers stable, repeatable protection by combining overload (thermal) and short-circuit (magnetic) mechanisms for precise fault clearing.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole configuration:\u003c\/strong\u003e Ensures simultaneous disconnection of all phases in a 3-phase system, enhancing safety and coordination in balanced electrical networks.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible:\u003c\/strong\u003e Specifically designed to match and work with matching Eaton OEM loadcenters and panelboards for seamless integration and reliable performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application range:\u003c\/strong\u003e Ideal for residential panels, commercial service entrances, and light industrial distribution where dependable protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage rating:\u003c\/strong\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Eaton\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e HMCP400K5X\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat problems does it solve?\u003c\/h3\u003e\n\u003cp\u003eThis breaker is purpose-built to protect branch circuits from overloads and short circuits, reducing the risk of equipment damage and fire hazards. By delivering fast, reliable trip responses and stable protection across a range of loads, it helps facilities maintain continuous operation with fewer unexpected outages.\u003c\/p\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacing or upgrading protection in residential service panels that require a robust 3-pole solution.\u003c\/li\u003e \u003cli\u003eFeeding commercial load centers and panelboards where space is at a premium but protection cannot be compromised.\u003c\/li\u003e \u003cli\u003eProtecting feeders in light industrial electrical distribution with three-phase systems up to 600 V.\u003c\/li\u003e \u003cli\u003eRetrofits or new installations where OEM compatibility ensures correct fit and coordinated protection with existing equipment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and care tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eRefer to Eaton installation guidelines to ensure correct termination and safe operation.\u003c\/li\u003e \u003cli\u003eVerify panel compatibility to maintain proper coordination with downstream devices and panelboard design.\u003c\/li\u003e \u003cli\u003eUse as part of a thoughtfully designed protection strategy that considers conductor sizes, downstream protection, and system fault currents.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy choose the Eaton HMCP400K5X\u003c\/h3\u003e\n\u003cp\u003eBeyond basic specs, this 400 A, 600 V, 3-pole molded case breaker offers dependable, repeatable protection with a form factor that respects panel space and OEM compatibility. It’s a practical, durable choice for professionals who require reliable protection for critical electrical infrastructure in a variety of settings.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349611335842,"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_6252eccf-6df1-4fce-95eb-e9b930947c8f.png?v=1764151281","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400k5x-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}