Eaton HMCP400X5X - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Introducing the Eaton HMCP400X5X — a 400 A, 600 V, 3-pole molded case circuit breaker engineered to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters.

Designed to optimize space without compromising protection, this compact molded case breaker fits neatly into tighter panel layouts while delivering robust performance when it matters most. The thermal-magnetic trip unit provides stable, repeatable protection across varying temperatures and load conditions, helping prevent nuisance trips while delivering fast interruption during faults.

• Three-pole, 400 A, 600 V rating — ideal for three-phase circuits common in commercial and light industrial environments.
• Compact molded case design — maximizes panel space and simplifies installation in dense electrical panels.
• Thermal-magnetic trip unit — combines thermal overload protection with magnetic short-circuit interruption for precise, reliable action.
• OEM compatibility — designed to pair with matching Eaton OEM loadcenters and panelboards for seamless integration and consistent performance.
• Versatile application — suitable for residential, commercial, and light industrial electrical systems needing sturdy branch-circuit protection.

Where it shines: use the HMCP400X5X as a main feeder or branch-circuit breaker in panelboards and loadcenters that require three-phase protection at 400 A per pole. It delivers clear, predictable tripping behavior, helping protect downstream equipment such as motors, HVAC controls, lighting racks, and processing lines from overloads and short circuits.

Practical installation notes: ensure the panelboard or loadcenter is designed for molded-case breakers and compatible with the HMCP400X5X family. The 3-pole configuration supports 3-phase systems, and the 600 V rating covers common commercial voltage scenarios. By choosing this Eaton breaker, you’re aligning with a time-tested design trusted in a wide range of facilities.

Upgrade or new-build projects seeking reliable, space-efficient, three-phase protection will find the Eaton HMCP400X5X a compelling choice. Add it to your panel and experience dependable protection that keeps systems running smoothly.