{"product_id":"eaton-hmcp400k5w-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Eaton HMCP400K5W - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered for dependable branch circuit protection in demanding environments, the Eaton HMCP400K5W is a 400 A, 600 V, 3-pole bolt-on molded case circuit breaker. It’s built to anchor into panelboards and loadcenters with a secure bolt-on mounting, delivering a rigid, vibration-resistant bus connection that stays put under heavy electrical load and equipment startup surges.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003eSecure bolt-on mounting\u003c\/b\u003e provides a rigid, vibration-resistant bus connection that maintains reliable contact over time.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eThermal-magnetic trip unit\u003c\/b\u003e delivers stable, repeatable protection performance across varying temperatures and load conditions, responding to both overloads and short circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCompatibility with OEM load centers\u003c\/b\u003e and panelboards for straightforward replacements and seamless system upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eVersatile 3-pole design\u003c\/b\u003e suits 3-phase systems common in commercial and light industrial applications while accommodating residential panelboard configurations where needed.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Eaton\u003c\/li\u003e \u003cli\u003ePart number: HMCP400K5W\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage rating: 400 A\u003c\/li\u003e \u003cli\u003eVoltage rating: 600 V\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 scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or expanding panelboards and loadcenters in commercial spaces where a robust 3-phase protection is required.\u003c\/li\u003e \u003cli\u003eReplacing aging breakers in Eaton-compatible OEM panel systems to restore reliable fault protection.\u003c\/li\u003e \u003cli\u003eProtecting large branch circuits feeding critical equipment, HVAC systems, motors, and distribution feeders in light industrial settings.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat this means in practice\u003c\/h3\u003e\n\u003cp\u003eChoosing the HMCP400K5W translates to long-term reliability and ease of installation in the field. The bolt-on design facilitates solid bus connections, reducing the risk of loose contacts that can lead to nuisance trips. The thermal-magnetic trip unit provides precise coordination between overload protection and short-circuit response, helping minimize downtime and equipment damage. Compatible with matching OEM load centers and panel boards, this breaker is a practical, scalable choice for upgrades or new builds that demand dependable, high-current protection in a compact form factor.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349611303074,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton-hmcp400k5w-400-a-600-v-3-pole-bolt-on-circuit-breaker-202.webp?v=1788691720","url":"https:\/\/www.ampstate.com\/products\/eaton-hmcp400k5w-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}