Eaton HMCP400W5X - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton HMCP400W5X is a robust 400 A, 600 V, 3-pole molded case circuit breaker designed to safeguard branch circuits in panelboards and loadcenters. Its compact, space-saving form factor helps you maximize panel efficiency while delivering dependable protection where it matters most.

• Current and voltage rating: 400 A, 600 V, ideal for demanding branch circuits and higher‑capacity feeders in residential, commercial, and light industrial environments.
• Three-pole configuration: Provides synchronized disconnection across all phases, ensuring reliable three-phase protection for motors, feeders, and distribution circuits.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection performance with fast response to short circuits, reducing equipment damage and downtime.
• Space-efficient molded case design: Lets you optimize panel space without compromising protection or ease of installation.
• OEM compatibility: Precisely engineered to integrate with matching Eaton loadcenters and panelboards for seamless upgrades and replacements.
• Versatile application range: Suitable for residential, commercial, and light industrial applications where reliable branch‑circuit protection is essential.

Real-world use cases

Use the HMCP400W5X to protect large feeders and motor loads in a commercial panel, upgrade a residential service panel for higher capacity circuits, or replace aging breakers in light industrial setups. The 3-pole design is highly effective for balanced three-phase systems, helping prevent nuisance trips and providing consistent protection across all phases.

Technical snapshot

• Manufacturer: Eaton
• Part number: HMCP400W5X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 400 A
• Voltage rating: 600 V
• Number of poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the HMCP400W5X means investing in a reliable, high‑capacity protection solution that aligns with Eaton’s panel systems and provides practical, real‑world benefits—from space-efficient panels to faster fault clearing and longer equipment life. It’s a smart, future‑proof choice for any installation that demands serious protection without sacrificing panel footprint or compatibility.