{"product_id":"eaton-kd3400x-circuit-breaker","title":"Eaton | KD3400X | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Eaton \u003cb\u003eKD3400X\u003c\/b\u003e Circuit Breaker—an exact-match solution for high-demand electrical systems. Designed for 400A, 3‑pole, 600V service, this genuine Eaton part is ideal for maintenance, retrofit, and replacement projects where precise specifications matter. When compatibility is non-negotiable, KD3400X is the reference you trust to keep your panel protected and running smoothly.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eExact-fit part number\u003c\/b\u003e: KD3400X is the specific replacement part you need. Before ordering, confirm fit and ratings against your panel or enclosure—the part number is the most reliable compatibility reference.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eBest for maintenance, retrofit, and replacement\u003c\/b\u003e: Use KD3400X when upgrading or reviving a distribution system to avoid mismatch delays and ensure code-compliant protection.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003e400A, 3-Pole, 600V ratings\u003c\/b\u003e: Protects three‑phase feeders in demanding environments, delivering appropriate current capability and voltage rating for industrial and commercial applications.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eThree-pole design for balanced protection\u003c\/b\u003e: Synchronizes trip across all phases, helping maintain system stability and minimize phase-to-phase faults in your distribution network.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eBuilt to integrate with Eaton ecosystems\u003c\/b\u003e: As a genuine Eaton component, KD3400X is engineered to align with Eaton panels, bus systems, and accessories for straightforward installation and reliable performance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cb\u003eWho benefits from the KD3400X\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eFacilities performing panel maintenance or upgrades in manufacturing, data centers, and large commercial buildings\u003c\/li\u003e \u003cli\u003eElectrical contractors completing retrofits or replacements in Eaton-based distribution systems\u003c\/li\u003e \u003cli\u003eProject planners seeking a dependable, exact-component replacement to minimize downtime and ensure continuity of service\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cb\u003eUse cases and practical scenarios\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eReplacing a failed or obsolete breaker in a three-phase 600V distribution panel where sustained 400A load protection is required.\u003c\/li\u003e \u003cli\u003eRetrofits that demand an exact Eaton-compatible part to preserve wiring interfaces, mounting, and trip characteristics.\u003c\/li\u003e \u003cli\u003eNew installations or upgrades where a clear, certified part reference reduces configuration risks and installation time.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cb\u003eHow to verify compatibility quickly\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMatch the equipment catalog or panel label to the \u003cb\u003eKD3400X\u003c\/b\u003e part number.\u003c\/li\u003e \u003cli\u003eConfirm your system voltage is 600V and the current rating is 400A.\u003c\/li\u003e \u003cli\u003eEnsure the breaker topology is \u003cb\u003e3-pole\u003c\/b\u003e to suit a three-phase distribution setup.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cb\u003eInstallation and safety notes\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eOnly qualified electricians should perform installation or replacement.\u003c\/li\u003e \u003cli\u003ePower must be isolated and locked out before service; follow local codes and manufacturer instructions.\u003c\/li\u003e \u003cli\u003eStore spare breakers in a clean, dry environment and inspect for any physical damage before use.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoosing the \u003cb\u003eEaton KD3400X\u003c\/b\u003e means prioritizing exact compatibility, reliable protection, and a path to minimize downtime in critical electrical systems. If your project requires a precise 400A, 3‑pole, 600V protective device, KD3400X delivers the alignment you need with Eaton’s trusted engineering behind it.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eaton","offers":[{"title":"Default Title","offer_id":46426462814370,"sku":"KD3400X","price":34246.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/eaton-kd3400x-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}