{"product_id":"eaton-hmcp400n5y-400a-600v-3-pole-circuit-breaker","title":"Eaton HMCP400N5Y - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Eaton HMCP400N5Y — a 400 A, 600 V, 3-pole molded case circuit breaker engineered to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Its compact molded-case design makes the most of panel space, while the thermal-magnetic trip unit provides stable, repeatable protection across a range of operating conditions.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSpace-efficient design:\u003c\/strong\u003e The compact molded-case footprint frees valuable panel space, making installations neater and easier to wire.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic protection:\u003c\/strong\u003e A thermal element handles overloads with predictable trip curves, while the magnetic element quickly clears high-energy short circuits for fast, reliable fault isolation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-phase suitability:\u003c\/strong\u003e With a 3-pole configuration, it is ideal for three-phase commercial and light industrial systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-capacity performance:\u003c\/strong\u003e Rated for 400 A and 600 V, it provides robust protection for feeders and main circuits in demanding environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready compatibility:\u003c\/strong\u003e Designed to pair with matching OEM loadcenters and panelboards, ensuring coordinated protection and streamlined service.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application range:\u003c\/strong\u003e Suitable for residential, commercial, and light industrial applications, offering flexible protection across multiple installation scenarios.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMain feeder protection for commercial panelboards and service equipment in offices, retail spaces, or multifamily buildings.\u003c\/li\u003e \u003cli\u003eFeeder protection for three-phase equipment in light industrial facilities, manufacturing lines, or HVAC systems.\u003c\/li\u003e \u003cli\u003eReplacement or upgrade in Eaton-compatible panels to maintain consistent protection characteristics and system coordination.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eHow it protects your system\u003c\/h3\u003e\n\u003cp\u003eThe HMCP400N5Y uses a \u003cstrong\u003ethermal-magnetic trip unit\u003c\/strong\u003e to balance protection speed and selectivity. Overload conditions trigger the thermal element for a controlled, predictable response, while short-circuit events engage the magnetic element for immediate fault clearing. The result is reliable, repeatable protection that minimizes downtime and protects wiring, devices, and downstream equipment.\u003c\/p\u003e \u003ch3\u003eCompatibility and installation at a glance\u003c\/h3\u003e\n\u003cp\u003eDesigned for use with \u003cstrong\u003ematching OEM loadcenters and panelboards\u003c\/strong\u003e, the HMCP400N5Y ensures a coordinated protection scheme with consistent trip characteristics. When paired with Eaton’s panel ecosystem, you’ll experience straightforward installation, simpler maintenance, and dependable performance over the life of the system.\u003c\/p\u003e \u003ch3\u003eTechnical specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\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\u003eNumber of poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhether you’re upgrading a panel, wiring a new commercial installation, or configuring a reliable protection point in a light industrial setting, the Eaton HMCP400N5Y delivers precise protection, efficient panel use, and seamless compatibility with Eaton’s panelboard lineup for long-term reliability.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349611761826,"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_9c136019-0666-4628-84b5-af59c773f37d.png?v=1764151299","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400n5y-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}