{"product_id":"eaton-hmcp400y5w-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Eaton HMCP400Y5W - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered for demanding panel installations, the Eaton HMCP400Y5W is a 400A, 600V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Its bolt-on mounting provides a secure, vibration-resistant bus connection that stays solid through the vibrations and temperature swings common in busy electrical rooms.\u003c\/p\u003e \u003ch3\u003eWhat makes it unique\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e ensures a rigid, vibration-resistant bus connection for long-term reliability in panel installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection with precise response to both overcurrent and short-circuit events.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready compatibility\u003c\/strong\u003e is designed to pair with matching Eaton OEM load centers and panelboards, simplifying upgrades and replacements.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatility for multiple sectors\u003c\/strong\u003e suited for residential, commercial, and light industrial applications where high-current 3-pole protection is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eKey specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Eaton\u003c\/li\u003e \u003cli\u003ePart Number: HMCP400Y5W\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\u003eMain or subfeed protection in three-phase panelboards and load centers for commercial facilities and light industrial setups.\u003c\/li\u003e \u003cli\u003eUpgrading aging or undersized breakers in retrofit projects where a robust bolt-on solution is required.\u003c\/li\u003e \u003cli\u003eProtection for large electrical loads such as motors, HVAC equipment, and distribution networks where reliable, predictable trip characteristics matter.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and compatibility tips\u003c\/h3\u003e\n\u003cp\u003eChoose this breaker for panelboards and load centers that specify compatible bolt-on molded case breakers. Follow OEM installation instructions for mounting torque and connection alignment to preserve the integrity of the bus connection. Because the unit uses a thermal-magnetic trip mechanism, expect consistent protection curves across varying ambient temperatures and load conditions, which helps reduce nuisance trips in steady-state operation.\u003c\/p\u003e \u003ch3\u003eWhy choose the HMCP400Y5W over other options\u003c\/h3\u003e\n\u003cp\u003eUnlike lighter-duty or plug-in alternatives, the HMCP400Y5W is built for high-current, three-phase environments where secure mounting and durable protection are critical. The bolt-on design minimizes movement and arcing risks in environments with vibration or dynamic loads, while the thermal-magnetic trip provides a dependable response to both sustained overloads and instantaneous short circuits. When paired with compatible Eaton OEM load centers and panelboards, it offers a seamless, reliable protection solution with long-term serviceability.\u003c\/p\u003e \u003ch3\u003eWho should consider this breaker\u003c\/h3\u003e\n\u003cp\u003eElectrical professionals upgrading industrial, commercial, or residential panels that require a 400A, 600V, 3-pole bolt-on solution. It’s ideal for facilities aiming for robust protection, easier maintenance, and compatibility with existing Eaton panelboard ecosystems.\u003c\/p\u003e \u003cp\u003eReady to protect your panel with a proven, high-capacity 3-pole solution? The Eaton HMCP400Y5W delivers dependable branch-circuit and short-circuit protection with a secure, vibration-resistant installation for lasting performance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349612548258,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton-hmcp400y5w-400-a-600-v-3-pole-bolt-on-circuit-breaker-584.webp?v=1788691984","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400y5w-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}