{"product_id":"eaton-hmcp400y5y-400a-600v-3-pole-circuit-breaker","title":"Eaton HMCP400Y5Y - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eEaton HMCP400Y5Y\u003c\/strong\u003e is a robust 400 A, 600 V, 3-Pole molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built for reliable performance in three-phase systems, it pairs high-capacity protection with a compact footprint to maximize available space in modern electrical enclosures.\u003c\/p\u003e \u003cp\u003eAt the heart of this breaker is a \u003cstrong\u003ethermal-magnetic trip unit\u003c\/strong\u003e, which provides stable, repeatable protection by quickly responding to both overloads and short circuits. This means fewer nuisance trips and more consistent protection for your critical circuits, even as ambient conditions fluctuate.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded case design\u003c\/strong\u003e optimizes panel space, making it easier to fit large protection without compromising layout or accessibility.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers reliable coordination between overload protection and short-circuit protection for safer, more predictable operation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600 V rating\u003c\/strong\u003e suitable for commercial and light industrial electrical distributions as a robust protective device.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e400 A, 3-Pole configuration\u003c\/strong\u003e supports 3-phase systems and can function as main or feeder protection within panelboards and loadcenters.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e designed to pair with matching Eaton OEM loadcenters and panelboards for seamless integration and simplified installation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e ideal for residential, commercial, and light industrial environments where space is at a premium but protection must not be compromised.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eUse cases and practical scenarios\u003c\/strong\u003e: install the HMCP400Y5Y in new or retrofit panelboards to guard large branch circuits, feed subpanels in commercial spaces, or serve as a reliable main\/feeder breaker in compact, space-constrained installations. Its 3-pole design ensures balanced protection across all phases, reducing the risk of uneven loading and electrical faults in three-phase systems.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhy this matters\u003c\/strong\u003e: choosing a molded case breaker with a compact footprint and a proven thermal-magnetic trip unit translates to easier wiring, faster panel layouts, and long-term reliability in Eaton-powered systems. If you’re updating or expanding an electrical distribution with OEM-compatible hardware, the HMCP400Y5Y offers a precise fit that aligns with your existing loadcenter and panelboard ecosystem.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eTechnical at a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAmperage rating: 400 A\u003c\/li\u003e \u003cli\u003eVoltage rating: 600 V\u003c\/li\u003e \u003cli\u003ePoles: 3\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eApplications: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349612613794,"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_caef7568-be9f-468c-b56d-f88068cdc8d1.png?v=1764151332","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400y5y-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}