{"product_id":"eaton-hmcp400f5y-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Eaton HMCP400F5Y - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Eaton HMCP400F5Y — a robust 400A, 600V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in today’s panelboards and load centers. Built to stand up to real-world conditions, it ensures reliable performance where it matters most, from residential panels to light commercial and industrial installations.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection, helping maintain consistent electrical continuity even in environments with movement or equipment vibration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection against overcurrent and short circuits. The magnetic element responds quickly to faults, while the thermal element manages gradual overloads for reduced nuisance trips.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e is engineered to be used with matching Eaton OEM load centers and panelboards, enabling straightforward replacements and seamless system upgrades without adapters or rework.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e suited for residential, commercial, and light industrial environments, protecting feeders and branch circuits across a range of load profiles and equipment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Eaton\u003c\/li\u003e \u003cli\u003ePart Number: HMCP400F5Y\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 400A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 600V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 3\u003c\/li\u003e \u003cli\u003eMounting Style: Bolt-on\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or retrofitting feeders in residential panelboards that require solid, code-compliant protection for large-capacity circuits.\u003c\/li\u003e \u003cli\u003eInstalling in commercial load centers where reliable 3-pole protection is needed for three-phase feeds or equipment with multiple conductors.\u003c\/li\u003e \u003cli\u003eIn light industrial panels where stable trip characteristics and vibration resistance help minimize downtime and electrical faults.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy choose this breaker\u003c\/h3\u003e\n\u003cp\u003eThe HMCP400F5Y stands out with a bolt-on installation that reinforces mechanical integrity, a precise thermal-magnetic trip that adapts to both steady loads and fault conditions, and full compatibility with Eaton’s OEM panel offerings. This combination reduces installation complexity, enhances protection reliability, and simplifies maintenance and future panel upgrades.\u003c\/p\u003e \u003ch3\u003eInstallation and maintenance tips\u003c\/h3\u003e\n\u003cp\u003eInstall according to applicable electrical codes and the panelboard manufacturer’s instructions. Use the proper torque specifications for bolt-on connections as prescribed by Eaton and ensure all conductors are clean and properly terminated. Periodically inspect for signs of overheating or abnormal wear, and verify that the trip unit remains responsive after any fault or maintenance activity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349610844322,"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_995c9eeb-4b35-436c-ab16-188be1b4bc0b.png?v=1764151262","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400f5y-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}