{"product_id":"eaton-hkd3400k-400a-600v-3-pole-circuit-breaker","title":"Eaton HKD3400K - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton \u003cstrong\u003eHKD3400K\u003c\/strong\u003e is a 400 A, 600 V, 3-pole molded case circuit breaker (MCCB) engineered to safeguard panelboards and load centers with reliable \u003cem\u003ebranch circuit overcurrent\u003c\/em\u003e and \u003cem\u003eshort-circuit protection\u003c\/em\u003e. Built to perform in everyday commercial spaces and light industrial environments, it delivers robust protection without sacrificing panel space.\u003c\/p\u003e \u003ch3\u003eWhat makes the HKD3400K stand out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded-case design\u003c\/strong\u003e minimizes footprint inside the panel, freeing up space for wiring and future expansion while keeping installation neat and accessible.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection—the thermal element handles sustained overloads, while the magnetic element delivers a fast, decisive response to short circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration\u003c\/strong\u003e ideal for 3-phase systems, making it a solid choice for commercial distributions and light industrial applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e400 A \/ 600 V rating\u003c\/strong\u003e ready for main feeder protection or large branch-circuit protection in modern panels and load centers.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e designed to align with matching Eaton OEM load centers and panelboards for streamlined replacements and confident, compliant upgrades.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eNew installations and retrofit projects in \u003cstrong\u003epanelboards\u003c\/strong\u003e and \u003cstrong\u003eload centers\u003c\/strong\u003e where space is at a premium but protection cannot be compromised.\u003c\/li\u003e \u003cli\u003eMain feeder protection and large branch circuits in \u003cstrong\u003ecommercial\u003c\/strong\u003e electrical distributions and light \u003cstrong\u003eindustrial\u003c\/strong\u003e panels.\u003c\/li\u003e \u003cli\u003eReplacement or upgrade in existing Eaton systems where compatibility with OEM chassis reduces installation time and risk.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\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 HKD3400K\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker (MCCB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\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 \u003cp\u003eWith the HKD3400K, electricians and facilities managers gain a dependable protection device that aligns with Eaton’s panel and load center ecosystems, simplifying installation, maintenance, and future expansions. By combining a compact form, a precise thermal-magnetic trip mechanism, and OEM-aligned compatibility, this breaker helps keep electrical systems safer, more reliable, and easier to spec across diverse environments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349604749474,"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_ca88fd7c-aeee-49fa-b40a-c9de1a82813e.png?v=1764151052","url":"https:\/\/www.ampstate.com\/products\/eaton-hkd3400k-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}