{"product_id":"eaton-hmcp400j5y-400a-600v-3-pole-circuit-breaker","title":"Eaton HMCP400J5Y - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton HMCP400J5Y is a 400A, 600V, 3-pole molded case circuit breaker engineered to safeguard panelboards and loadcenters with precise, dependable overcurrent protection. Built for real-world electrical layouts, it’s the solid choice when you need reliable performance in demanding environments.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded-case design\u003c\/strong\u003e frees up valuable panel space, enabling cleaner installations and easier panel hardening in tight electrical rooms.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by automatically coordinating overload response with instantaneous short-circuit interruption, even as ambient conditions change.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration\u003c\/strong\u003e supports three-phase distribution and ensures synchronized protection across all conductors, simplifying panel wiring and trip coordination.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e400 A, 600 V rating\u003c\/strong\u003e handles substantial branch-circuit loads and higher voltage distribution, making it suitable for commercial and light industrial feeders as well as residential service panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM loadcenter compatibility\u003c\/strong\u003e is built to align with matching Eaton loadcenters and panelboards, reducing installation surprises and ensuring reliable operation from the moment it’s wired in.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e supports residential, commercial, and light industrial systems that require robust protection for main feeders and critical circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eDesigned to solve common protection challenges, the HMCP400J5Y responds quickly to short circuits while preventing nuisance trips from minor overloads. This means less downtime, fewer maintenance calls, and a safer, more dependable electrical system overall.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eUse cases and scenarios\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eProtecting main feeders in service panels and subpanels for multi-tenant or commercial spaces\u003c\/li\u003e \u003cli\u003eProviding branch-circuit protection for heavy equipment, HVAC controls, and motor loads in light industrial settings\u003c\/li\u003e \u003cli\u003eSupplying reliable three-phase protection in electrical rooms that rely on compact, space-efficient breakers\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eTechnical snapshot\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Eaton\u003c\/li\u003e \u003cli\u003ePart\/Model: HMCP400J5Y\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage rating: 400 A\u003c\/li\u003e \u003cli\u003eVoltage rating: 600 V\u003c\/li\u003e \u003cli\u003eNumber of poles: 3\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal for professionals upgrading or outfitting panels, the HMCP400J5Y combines space efficiency, precise protection, and OEM-friendly compatibility to provide a practical, long-term solution for dependable electrical safety in a range of environments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349611204770,"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_6f41e5bc-249a-4bfa-aec9-a006cc048531.png?v=1764151276","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400j5y-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}