{"product_id":"eaton-dk3400k-400a-240v-3-pole-circuit-breaker","title":"Eaton DK3400K - 400 A, 240 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003ePower reliability starts with the right protection. The Eaton DK3400K is a 400A, 240V, 3-pole molded case circuit breaker designed to guard every branch circuit in panelboards and loadcenters. Built for demanding environments, this unit delivers consistent protection where it matters most.\u003c\/p\u003e \u003cp\u003eWhy you’ll value the DK3400K\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-capacity protection\u003c\/strong\u003e: 400 A at 240 V in a compact 3-pole molded case, ideal for large feeders and demanding branch circuits without crowding your panel.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e: Provides stable, repeatable protection that responds accurately to both overloads and short circuits, reducing nuisance trips and downtime.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpace-efficient design\u003c\/strong\u003e: Compact molded case helps maximize panel space while maintaining robust protection, simplifying panel layouts in both new builds and upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e: Engineered to drop into matching Eaton loadcenters and panelboards, ensuring a seamless, reliable fit and straightforward serviceability.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e: Suitable for residential, commercial, and light industrial applications where dependable branch-circuit protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eKey benefits and practical use cases\u003c\/h3\u003e \u003cp\u003eInstall the DK3400K in panelboards and loadcenters where you need dependable protection for large branch circuits or critical feeders. Its thermal-magnetic mechanism adapts to fluctuating loads common in commercial spaces or light industrial environments, delivering protection without compromising on performance. Whether you’re upgrading an aging panel, stocking spare parts for a service fleet, or outfitting a new installation, the DK3400K provides the reliability Eaton customers count on.\u003c\/p\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Eaton\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e DK3400K\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 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 240 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 in panelboards and loadcenters\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eDesigned for installers and facility managers who need a dependable, OEM-compatible solution, the Eaton DK3400K delivers predictable protection, straightforward installation, and long-term serviceability in a compact footprint.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349529383074,"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_137b2d81-cfc3-4c5b-a650-60cc375867f2.png?v=1764148900","url":"https:\/\/www.ampstate.com\/products\/eaton-dk3400k-400a-240v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}