{"product_id":"eaton-hmcp400d5wd09-400a-600v-3-pole-circuit-breaker","title":"Eaton HMCP400D5WD09 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eEaton HMCP400D5WD09\u003c\/strong\u003e is a robust 400A, 600V, 3-pole molded‑case circuit breaker designed to deliver dependable branch circuit overcurrent and short‑circuit protection in panelboards and load centers. Built for spaces where efficiency matters, its compact molded case design helps you maximize panel real estate without sacrificing protection.\u003c\/p\u003e \u003ch2\u003eKey advantages that set it apart\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded‑case design\u003c\/strong\u003e maximizes panel space, making it ideal for dense electrical installations in residential, commercial, and light industrial environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal‑magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection performance, balancing nuisance trips with fast response to dangerous faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree‑pole configuration\u003c\/strong\u003e supports three‑phase systems, delivering coordinated protection for multi‑phase feeders and motors up to 600V.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM‑grade compatibility\u003c\/strong\u003e designed to work with matching Eaton OEM loadcenters and panelboards, ensuring reliable fit, electrical performance, and straightforward replacement.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-capacity protection\u003c\/strong\u003e 400A rating makes it well suited for heavy feeders, equipment circuits, and demanding commercial applications, while maintaining safe and predictable operation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eTechnical snapshot\u003c\/h2\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 HMCP400D5WD09\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\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 \u003ch2\u003eIdeal use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or refreshing panelboards and loadcenters in light commercial settings, where a reliable 3‑pole 400A solution is needed.\u003c\/li\u003e \u003cli\u003eFeeder protection for large circuits feeding HVAC equipment, commercial lighting, or motor loads in small industrial environments.\u003c\/li\u003e \u003cli\u003eReplacement for aging or incompatible breakers within OEM panels that require a precise Eaton fit and performance profile.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy this matters in practice\u003c\/h2\u003e\n\u003cp\u003eChoosing the HMCP400D5WD09 means prioritizing predictable protection for critical electrical feeders. The thermal‑magnetic trip mechanism reduces the likelihood of nuisance trips during normal inrush events while still delivering instantaneous disconnection for short‑circuit faults. Its compatibility with Eaton OEM loadcenters means you won’t fight fitment or performance issues during installation, helping projects stay on schedule and within code compliance for residential, commercial, and light industrial applications.\u003c\/p\u003e \u003ch2\u003eInstallation and compatibility tips\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eVerify that your panelboard or load center is designed to accept molded‑case breakers from Eaton’s HMCP family to ensure proper mechanical fit and electrical performance.\u003c\/li\u003e \u003cli\u003eFollow standard electrical practices and NEC guidelines when wiring: secure connections, appropriate torque, and verify correct phase alignment for three‑phase systems.\u003c\/li\u003e \u003cli\u003eUse it as a dedicated protection device for feeders and large branch circuits where a stable 400A protection level is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349610582178,"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_b0a521ee-1439-4e92-b864-7231cebbe8b4.png?v=1764151253","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400d5wd09-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}