Eaton HMCP400N5X - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton HMCP400N5X is a 400 A, 600 V, 3-pole molded case circuit breaker engineered to safeguard panelboards and load centers from overcurrent and short circuits. Equipped with a thermal-magnetic trip unit, it delivers stable, repeatable protection that minimizes nuisance trips in demanding electrical environments.

Why this breaker stands out

• Space-efficient design: A compact molded case helps maximize panel space, making it easier to organize feeders in tight enclosures.
• Reliable protection: The thermal-magnetic trip unit provides fast, precise response to overloads and short circuits, delivering dependable protection for critical circuits.
• 3-pole configuration: Ideal for three-phase systems common in commercial and light industrial settings, ensuring coordinated protection across all phases.
• High-current capability: With a 400 A rating, it’s suited for main feeders and large branch circuits within panelboards.
• OEM compatibility: Designed to be used with matching OEM loadcenters and panelboards for a seamless, integrated protection solution.

Key specifications

• Amperage rating: 400 A
• Voltage rating: 600 V
• Number of poles: 3
• Type: Thermal-magnetic molded case circuit breaker
• Manufacturer: Eaton
• Part number: HMCP400N5X

Ideal use cases

Perfect for residential, commercial, and light industrial applications where robust branch circuit overcurrent and short-circuit protection is required. Use it as a main feeder protection device in panelboards, as a service disconnect in larger installations, or as a reliable protection component within sub-panel distributions. Its compatibility with matching OEM loadcenters and panelboards simplifies specification and installation, delivering a cohesive protection strategy across your electrical infrastructure.

Practical considerations

When integrating the HMCP400N5X, ensure alignment with the panelboard’s design and the OEM recommendations. The 3-pole design supports three-phase systems, and the 600 V rating covers a broad range of commercial and industrial circuits. The result is a compact, durable protection solution that keeps wiring organized and accessible while maintaining strong protection against overcurrent events.

Choose the Eaton HMCP400N5X for a dependable, space-conscious circuit breaker that pairs precisely with compatible panelboards to deliver clear protection, straightforward installation, and long-term reliability in demanding environments.