{"product_id":"eaton-kdc3400y-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Eaton KDC3400Y - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered for reliability in electrical distribution, the Eaton KDC3400Y is a 400 A, 600 V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built to endure demanding environments, it combines secure mounting, precise protection, and OEM compatibility into a single, robust solution.\u003c\/p\u003e \u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eRigid bolt-on mounting\u003c\/strong\u003e provides a secure, vibration-resistant bus connection, helping prevent loose connections and nuisance trips in panels with movement or vibration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e offers stable, repeatable protection by responding to both long-term overloads and short-circuit conditions, with minimal nuisance trips due to temperature changes.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole design\u003c\/strong\u003e ensures balanced protection across all phases in 3‑phase systems, reducing the risk of uneven currents damaging equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600 V rated insulation\u003c\/strong\u003e suitable for commercial and light industrial distribution, enabling safe operation across higher voltage circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready compatibility\u003c\/strong\u003e with matching Eaton OEM load centers and panelboards, facilitating straightforward replacements and upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e suitable for residential, commercial, and light industrial environments, from service entrances to distribution panels.\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: KDC3400Y\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\u003cp\u003eWhen upgrading a panelboard to support higher loads, the KDC3400Y provides a robust 400 A protection point for 3‑phase distribution. In new installations, it pairs with compatible Eaton panelboards to deliver reliable protection for commercial spaces, light industrial facilities, or critical equipment fed from 3‑phase 600 V networks. Its bolt-on design is well-suited for panels where a rigid, long-lasting connection is essential in environments with vibration or where serviceability is a priority.\u003c\/p\u003e \u003ch3\u003ePractical Tips\u003c\/h3\u003e\n\u003cp\u003eTo get the most from the KDC3400Y, ensure your panelboard is compatible with 3‑pole, bolt-on molded case breakers and rated for 600 V. Follow the mounting guidelines to secure the breaker to the bus, and verify wiring gauge and terminal torque for each connection. When replacing an older breaker, confirm the bus connection and mounting pattern align with Eaton's KDC3400Y to maintain reliable protection and ease of maintenance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349631029410,"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_b53789f3-a9ce-4f5e-80d1-991f1e4fabd4.png?v=1764151951","url":"https:\/\/www.ampstate.com\/products\/eaton-kdc3400y-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}