Eaton | KD3400X | Circuit Breaker | 400A | 3-Pole | 600V

Meet the Eaton KD3400X 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.

• Exact-fit part number: 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.
• Best for maintenance, retrofit, and replacement: Use KD3400X when upgrading or reviving a distribution system to avoid mismatch delays and ensure code-compliant protection.
• 400A, 3-Pole, 600V ratings: Protects three‑phase feeders in demanding environments, delivering appropriate current capability and voltage rating for industrial and commercial applications.
• Three-pole design for balanced protection: Synchronizes trip across all phases, helping maintain system stability and minimize phase-to-phase faults in your distribution network.
• Built to integrate with Eaton ecosystems: As a genuine Eaton component, KD3400X is engineered to align with Eaton panels, bus systems, and accessories for straightforward installation and reliable performance.

Who benefits from the KD3400X

• Facilities performing panel maintenance or upgrades in manufacturing, data centers, and large commercial buildings
• Electrical contractors completing retrofits or replacements in Eaton-based distribution systems
• Project planners seeking a dependable, exact-component replacement to minimize downtime and ensure continuity of service

Use cases and practical scenarios

• Replacing a failed or obsolete breaker in a three-phase 600V distribution panel where sustained 400A load protection is required.
• Retrofits that demand an exact Eaton-compatible part to preserve wiring interfaces, mounting, and trip characteristics.
• New installations or upgrades where a clear, certified part reference reduces configuration risks and installation time.

How to verify compatibility quickly

• Match the equipment catalog or panel label to the KD3400X part number.
• Confirm your system voltage is 600V and the current rating is 400A.
• Ensure the breaker topology is 3-pole to suit a three-phase distribution setup.

Installation and safety notes

• Only qualified electricians should perform installation or replacement.
• Power must be isolated and locked out before service; follow local codes and manufacturer instructions.
• Store spare breakers in a clean, dry environment and inspect for any physical damage before use.

Choosing the Eaton KD3400X 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.