{"product_id":"eaton-hmcp400j5w-400a-600v-3-pole-circuit-breaker","title":"Eaton HMCP400J5W - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton HMCP400J5W is a 400A, 600V, 3-pole molded case circuit breaker engineered to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Its compact design maximizes panel space without sacrificing performance, making it a practical choice for modern electrical assemblies where layout and safety matter.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSpace-efficient molded case design:\u003c\/strong\u003e a compact footprint that frees up panel real estate for additional devices and easier wiring routing.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e delivers stable, repeatable protection by sensing overcurrent conditions quickly and responding consistently across operating temperatures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration (three-phase):\u003c\/strong\u003e ideal for commercial and light industrial electrical systems that require balanced protection across all phases.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e400A, 600V rating:\u003c\/strong\u003e supports high-current branch circuits while accommodating the voltage levels typical in panelboards and industrial panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM panel compatibility:\u003c\/strong\u003e designed to match Eaton OEM loadcenters and panelboards for straightforward replacement and dependable form-fit integration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDiverse applications:\u003c\/strong\u003e well-suited for residential, commercial, and light industrial installations where dependable protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Eaton\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e HMCP400J5W\u003c\/li\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 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\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical use cases\u003c\/h3\u003e\n\u003cp\u003eIn residential and commercial panelboards, the HMCP400J5W provides robust protection for high-load circuits such as HVAC feeds, electric water heaters, and heavy lighting circuits. In light industrial settings, it supports mixed-use panels where space is at a premium and reliability is non-negotiable. When upgrading aging panels or retrofitting OEM systems, this breaker’s compatibility with matching Eaton loadcenters simplifies installation and maintenance, reducing downtime and complexity.\u003c\/p\u003e \u003cp\u003eChoosing the HMCP400J5W means prioritizing safety, panel efficiency, and long-term reliability. With its solid thermal-magnetic protection and OEM-aligned design, you get a dependable solution that protects both people and equipment while keeping your electrical distribution organized and responsive to changing loads.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349611139234,"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_1e7ced96-13d4-487e-b130-32f5b0deed05.png?v=1764151273","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400j5w-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}