{"product_id":"eaton-hmcp400w5y-400a-600v-3-pole-circuit-breaker","title":"Eaton HMCP400W5Y - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eEaton HMCP400W5Y\u003c\/strong\u003e is a 400A, 600V, 3-pole molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters.\u003c\/p\u003e \u003cp\u003eEngineered for precise, repeatable protection, the thermal-magnetic trip unit provides fast instantaneous response to short-circuit events while offering reliable long-term protection against overloads as temperatures shift. The compact molded-case design minimizes panel footprint, helping you maximize space without compromising safety or performance.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 600V\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\u003eProtection:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed to be matched with OEM loadcenters and panelboards for seamless integration\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker matters for your electrical system\u003c\/h3\u003e\n\u003cp\u003eFor residential, commercial, and light industrial environments, the HMCP400W5Y provides robust protection where large loads and multi‑unit circuits demand reliable interrupting capability. A 3‑pole configuration ensures balanced protection across three‑phase systems, reducing the risk of uneven loading and voltage fluctuations that can damage equipment or compromise safety. With a 600V rating, this breaker is built to handle higher transient voltages common in commercial and light industrial applications, giving you a safer, more resilient electrical distribution network.\u003c\/p\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eNew installations in panelboards or loadcenters where space is at a premium, thanks to its compact design.\u003c\/li\u003e \u003cli\u003eRetrofits in Eaton-compatible panels where a high‑amperage, three‑phase protection device is required.\u003c\/li\u003e \u003cli\u003eCommercial HVAC, lighting, or machinery panels that demand reliable 400A protection with dependable short-circuit response.\u003c\/li\u003e \u003cli\u003eResidential and light industrial applications needing rigorous branch-circuit protection without frequent nuisance trips.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical guidance and benefits\u003c\/h3\u003e\n\u003cp\u003eChoosing the HMCP400W5Y means aligning with Eaton’s protected‑equipment ecosystem. Its compatibility with matching OEM loadcenters and panelboards simplifies installation, reduces mismatch risk, and supports consistent performance across your distribution system. The thermal‑magnetic trip mechanism provides predictable trip curves, so you can design protective coordination with upstream devices and downstream equipment, minimizing downtime and collateral damage when faults occur.\u003c\/p\u003e \u003cp\u003eTo get the most from this breaker, pair it with panels designed for high‑amp, three‑pole protection and follow the manufacturer's installation and torque guidelines. Ensure the panel is rated for 600V service and that the overall protection scheme matches your load profiles and safety requirements.\u003c\/p\u003e \u003cp\u003eWhether you’re upgrading an aging service, expanding a commercial suite, or equipping a new light‑industrial installation, the Eaton HMCP400W5Y delivers reliable, space‑efficient protection with the confidence of an established electrical OEM name.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey benefits at a glance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eRobust 400A, 600V, 3‑pole protection for demanding circuits\u003c\/li\u003e \u003cli\u003eCompact design to maximize panel space\u003c\/li\u003e \u003cli\u003eStable, repeatable protection via thermal‑magnetic trip\u003c\/li\u003e \u003cli\u003eSeamless compatibility with matching Eaton OEM loadcenters and panelboards\u003c\/li\u003e \u003cli\u003eVersatile for residential, commercial, and light industrial applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349612187810,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton-hmcp400w5y-400-a-600-v-3-pole-circuit-breaker-ampstate-523.webp?v=1788691915","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400w5y-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}