Eaton HMCP400D5W - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Introducing the Eaton HMCP400D5W, a dependable 400A, 600V, 3-pole molded case circuit breaker engineered to protect your electrical distribution with precision. Built for branch circuit overcurrent and short-circuit protection in panelboards and loadcenters, this unit helps keep critical systems safe while maximizing panel-space efficiency.

• Compact molded-case design minimizes footprint and frees precious panel space without sacrificing performance, making it ideal for dense installations.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining overcurrent sensing with fast short-circuit response, reducing nuisance trips and ensuring dependable interruption when it matters most.
• 3-pole configuration provides synchronized disconnection across three phases, a must-have for balanced protection in three-phase commercial and light industrial systems.
• OEM-compatible designed to pair with matching Eaton OEM loadcenters and panelboards for straightforward installation, seamless coordination, and reliable system performance.
• High-current capability rated at 400A/600V, suitable for main or feeder protection in larger panel assemblies used in residential, commercial, and light industrial settings.

The HMCP400D5W is built for electricians, panel builders, and facilities managers who demand robust protection and long-term reliability in everyday electrical infrastructures. Its molded-case construction and thermal-magnetic trip mechanism deliver predictable behavior across varying fault conditions, helping you meet code requirements and keep downtime to a minimum.

Why this breaker stands out

• Space-efficient design that doesn’t compromise on safety or performance, enabling more flexible panel layouts.
• Accurate, repeatable trip characteristics mean safer resets and fewer unexpected trips during transient faults.
• Three-phase protection with a proven track record in panelboards and loadcenters used across residential upgrades, commercial spaces, and light industrial installations.

Technical snapshot
Manufacturer: Eaton
Part Number: HMCP400D5W
Type: Thermal-magnetic molded case circuit breaker
Amperage: 400A
Voltage: 600V
Poles: 3
Application: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters