{"product_id":"eaton-lt3400fa-400a-600v-3-pole-circuit-breaker","title":"Eaton LT3400FA - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton LT3400FA is a high-capacity, 3-pole molded case circuit breaker engineered to protect large branch circuits with precision. With a 400 A rating and a 600 V maximum, this device delivers reliable overcurrent and short-circuit protection inside panelboards and loadcenters, making it a trusted choice for demanding electrical distributions in residential, commercial, and light industrial settings.\u003c\/p\u003e \u003ch2\u003eWhy the LT3400FA stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded case design\u003c\/strong\u003e maximizes interior panel space, allowing you to fit high-current protection where it’s needed without crowding the enclosure.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection across a wide range of temperatures and load conditions, reducing nuisance trips and preserving downstream equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-loadcenter compatibility\u003c\/strong\u003e is built to pair seamlessly with matching Eaton panelboards and loadcenters for straightforward installation and reliable long-term performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-phase protection\u003c\/strong\u003e with a 400 A rating is ideal for feeders and large branch circuits in commercial and light industrial applications, while still suitable for higher-demand residential panel configurations when three-phase distribution is present.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\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 LT3400FA\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:\u003c\/strong\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\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 \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cp\u003eDeploy the LT3400FA in installations that demand robust high-current protection without sacrificing space or compatibility. It’s well-suited for:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eLarge feeders for three-phase equipment in commercial buildings, warehouses, and light industrial facilities.\u003c\/li\u003e \u003cli\u003eUpgrade projects where panel space is at a premium but the protection level must keep pace with growing electrical loads.\u003c\/li\u003e \u003cli\u003eResidential panelboards or subpanels in homes with three-phase service or sizable, high-demand electrical loads.\u003c\/li\u003e \u003cli\u003eApplications requiring dependable branch circuit protection that aligns with Eaton’s panelboard ecosystems.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and compatibility considerations\u003c\/h3\u003e\n\u003cp\u003eTo ensure optimal performance, pair the LT3400FA with matching Eaton OEM loadcenters and panelboards. This alignment guarantees coordinated trip characteristics and mechanical compatibility, helping streamline commissioning and ongoing maintenance. When integrating, consider the following practical points:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eVerify the panel rating and ensure a correct fit within the enclosure’s allowable current and space class.\u003c\/li\u003e \u003cli\u003eLeverage the thermal-magnetic trip to achieve predictable protection across daily operating conditions and ambient temperature variations.\u003c\/li\u003e \u003cli\u003eUse as a main feeder or a critical protection device for large branches, ensuring downstream conductors and devices are rated for 600 V and 400 A as appropriate.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe Eaton LT3400FA is more than a heavy-duty breaker—it’s a purpose-built solution for reliable, efficient power distribution. By combining a compact form factor, precise thermal-magnetic protection, and seamless compatibility with Eaton’s panel ecosystems, it helps you design safer, more resilient electrical systems that stand up to rigorous commercial and industrial use while still serving sophisticated residential applications where three-phase protection is required.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349637484706,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton-lt3400fa-400-a-600-v-3-pole-circuit-breaker-ampstate-breakers-376.webp?v=1788699487","url":"https:\/\/www.ampstate.com\/products\/eaton-lt3400fa-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}