Eaton HKD3400T107W 400A 3-Pole 600 V Circuit Breaker

The Eaton HKD3400T107W is a robust three‑pole circuit breaker designed to protect large, three‑phase electrical systems. With a 400 A rating and a 600 V capacity, this unit delivers dependable, coordinated protection for demanding industrial and commercial feeders and motors. Built to handle high‑load scenarios, the HKD3400T107W is the reliable choice when you need solid, immediate interruption to prevent equipment damage and downtime.

• Current rating: 400 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HKD3400T107W
• Brand line: Eaton HKD family

Why a 3-pole, 600 V solution matters for your system

In three‑phase configurations, a 3‑pole breaker like the HKD3400T107W provides synchronized protection across all phases. This helps ensure that a fault leads to a complete disconnection, reducing the risk of phase imbalances that can stress motors, drives, and connected equipment. The 600 V rating expands compatibility with higher‑voltage distribution schemes typically found in industrial environments, offering a single, cohesive protection strategy for your power distribution network.

What sets this Eaton breaker apart

• Logical, phase‑coordinated protection: triple‑pole design ensures simultaneous disconnection across all phases on fault, safeguarding connected loads.
• High‑capacity protection: 400 A rating supports sizable feeders and motor circuits without compromising protection or protection speed.
• Stable, reliable operation: engineered by Eaton to perform consistently in demanding industrial settings and panel assemblies.

Ideal use cases

Suitable for large three‑phase feeders, industrial motors, and complex power distribution in manufacturing plants, warehouses, HVAC systems, and other facilities that rely on robust three‑phase power. If your panel requires a 3‑pole device with a 600 V ceiling and substantial current capacity, the HKD3400T107W is a well‑matched solution.

Practical installation guidance

• Ensure your electrical system and panel are rated for 600 V operation and 400 A circuits before installing.
• Verify conductor sizes and secure terminations according to manufacturer guidelines to maintain safe, reliable connections.
• Keep records of installation and any maintenance checks to monitor performance over time.
• Install only compatible Eaton devices within the HKD family to preserve system compatibility and predictability.