{"product_id":"eaton-hmcp400r5y-400a-600v-3-pole-circuit-breaker","title":"Eaton HMCP400R5Y - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton HMCP400R5Y is a 400 A, 600 V, 3-pole molded case circuit breaker designed to deliver dependable branch circuit protection for panelboards and load centers. Built to fit seamlessly into established Eaton systems, this breaker combines compact engineering with reliable protection, making it an ideal upgrade or installation choice for demanding electrical environments.\u003c\/p\u003e \u003ch3\u003eKey benefits that matter in the field\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSpace-efficient design:\u003c\/strong\u003e The compact molded case form helps maximize panel space, simplifying layouts in crowded panels without compromising protection performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic protection:\u003c\/strong\u003e A dual-action trip unit provides stable overload protection (thermal) and fast short-circuit clearance (magnetic), delivering repeatable, predictable response under varying load conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole configuration for 3-phase systems:\u003c\/strong\u003e Specifically suited for 3-phase electrical installations, aligning with common commercial and light industrial power distribution needs.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible ecosystem:\u003c\/strong\u003e Engineered to pair with matching OEM load centers and panelboards, ensuring consistent electrical coordination and reliable fit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application range:\u003c\/strong\u003e Suitable for residential, commercial, and light industrial environments, making it a flexible choice for diversified electrical projects.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\u003cstrongamperage rating:\u003e 400 A\u003c\/strongamperage\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongvoltage rating:\u003e 600 V\u003c\/strongvoltage\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongpoles:\u003e 3\u003c\/strongpoles:\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongtype:\u003e Thermal-magnetic molded case circuit breaker\u003c\/strongtype:\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrongpart number:\u003e HMCP400R5Y\u003c\/strongpart\u003e\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhere and how you’ll use it\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMain or branch circuit protection in commercial panelboards and residential\/light commercial load centers where 3-phase distribution is required\u003c\/li\u003e \u003cli\u003eUpgrading protection in existing Eaton-powered installations to enhance overcurrent and short-circuit response\u003c\/li\u003e \u003cli\u003eNew installations that demand a compact breaker with reliable trip performance in constrained panel spaces\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical considerations for installation and use\u003c\/h3\u003e\n\u003cp\u003eChoose the HMCP400R5Y when you need a rugged, compatible solution that aligns with OEM panelboards. Ensure proper mounting to maintain alignment with bus bars and follow standard electrical installation practices for torque and connection integrity. This breaker’s thermal-magnetic trip unit is designed to deliver stable protection across a range of operating temperatures and load profiles, reducing nuisance trips while maintaining safety against short circuits.\u003c\/p\u003e \u003ch3\u003eWhy this Eaton breaker stands out\u003c\/h3\u003e\n\u003cp\u003eUnlike generic substitutes, the HMCP400R5Y is purpose-built to integrate with Eaton’s panelboard ecosystem, providing coordinated protection and dependable performance in real-world installations. The 3-pole design is ready for 3-phase applications, and its compact footprint helps you maximize panel capacity without sacrificing protection quality. Whether you’re protecting motors, feeders, or critical distribution circuits, this breaker offers precise, repeatable protection that electricians trust in residential, commercial, and light industrial settings.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349611958434,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton-hmcp400r5y-400-a-600-v-3-pole-circuit-breaker-ampstate-651.webp?v=1788691870","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400r5y-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}