{"product_id":"eaton-hmcp400d5w-400a-600v-3-pole-circuit-breaker","title":"Eaton HMCP400D5W - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Eaton HMCP400D5W, a dependable 400A, 600V, 3-pole molded case circuit breaker engineered to protect your electrical distribution with precision. Built for branch circuit overcurrent and short-circuit protection in panelboards and loadcenters, this unit helps keep critical systems safe while maximizing panel-space efficiency.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded-case design\u003c\/strong\u003e minimizes footprint and frees precious panel space without sacrificing performance, making it ideal for dense installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by combining overcurrent sensing with fast short-circuit response, reducing nuisance trips and ensuring dependable interruption when it matters most.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration\u003c\/strong\u003e provides synchronized disconnection across three phases, a must-have for balanced protection in three-phase commercial and light industrial systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e designed to pair with matching Eaton OEM loadcenters and panelboards for straightforward installation, seamless coordination, and reliable system performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-current capability\u003c\/strong\u003e rated at 400A\/600V, suitable for main or feeder protection in larger panel assemblies used in residential, commercial, and light industrial settings.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe HMCP400D5W is built for electricians, panel builders, and facilities managers who demand robust protection and long-term reliability in everyday electrical infrastructures. Its molded-case construction and thermal-magnetic trip mechanism deliver predictable behavior across varying fault conditions, helping you meet code requirements and keep downtime to a minimum.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eSpace-efficient design that doesn’t compromise on safety or performance, enabling more flexible panel layouts.\u003c\/li\u003e \u003cli\u003eAccurate, repeatable trip characteristics mean safer resets and fewer unexpected trips during transient faults.\u003c\/li\u003e \u003cli\u003eThree-phase protection with a proven track record in panelboards and loadcenters used across residential upgrades, commercial spaces, and light industrial installations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eTechnical snapshot\u003c\/strong\u003e\u003cbr\u003e\nManufacturer: Eaton\u003cbr\u003e\nPart Number: HMCP400D5W\u003cbr\u003e\nType: Thermal-magnetic molded case circuit breaker\u003cbr\u003e\nAmperage: 400A\u003cbr\u003e\nVoltage: 600V\u003cbr\u003e\nPoles: 3\u003cbr\u003e\nApplication: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349610549410,"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_8a504b74-dc1a-48e4-8aa3-9f38d03be06e.png?v=1764151252","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400d5w-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}