{"product_id":"eaton-kd3400y-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Eaton KD3400Y - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton KD3400Y is a robust 400 A, 600 V, 3-pole bolt-on molded case circuit breaker designed to protect your electrical systems from overloads and short circuits. Built for dependable branch circuit protection in panelboards and load centers, this unit brings reliable performance to residential, commercial, and light industrial settings.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e: delivers a rigid, vibration-resistant bus connection for stable, long-lasting protection even in dynamic installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e: provides stable, repeatable protection by responding to overloads with the thermal element and short circuits with the magnetic element, reducing nuisance trips and promoting continuity of service.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole design at 400 A \/ 600 V\u003c\/strong\u003e: well-suited for three-phase power distribution, offering comprehensive protection for feeders and main or branch circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e: crafted to work seamlessly with matching Eaton OEM load centers and panelboards for straightforward upgrades, replacements, or expansions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e: ideal for residential service panels, commercial electrical rooms, and light industrial equipment feeders where reliable fault protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this KD3400Y matters for your electrical system\u003c\/h3\u003e\n\u003cp\u003eThis molded case circuit breaker combines a bolt-on mounting approach with a thermal-magnetic trip, delivering predictable protection characteristics that you can trust under real-world conditions. The rigid mounting minimizes vibration-related wear on bus connections, helping sustain performance over time in busy panel environments. In short, the KD3400Y helps protect people, property, and equipment by ensuring quick and precise isolation of fault currents while maintaining service continuity under normal operation.\u003c\/p\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\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\u003eNumber of poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal for\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eResidential service panel upgrades and main feeder protection\u003c\/li\u003e \u003cli\u003eCommercial electrical rooms requiring reliable three-phase protection\u003c\/li\u003e \u003cli\u003eLight industrial feeders where durable, high-ampacity protection is needed\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhen selecting a replacement or upgrading your protection scheme, verify compatibility with your Eaton panelboard or load center to maintain proper protective coordination and system reliability. The KD3400Y is a purpose-built solution for demanding electrical environments where dependable overcurrent and short-circuit protection matters most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349628014754,"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_e76c0ac1-695c-4894-aeed-78e09f50925a.png?v=1764151860","url":"https:\/\/www.ampstate.com\/products\/eaton-kd3400y-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}