Eaton HMCP400D5C - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton HMCP400D5C is a 400A, 600V, 3-pole molded case circuit breaker engineered to protect critical branch circuits in panelboards and load centers. Its compact molded-case design makes the most of limited panel space, while the thermal-magnetic trip unit delivers stable, repeatable protection against both overcurrent and short circuits.

Designed for versatility, this breaker works across residential, commercial, and light industrial applications. The 3-pole configuration supports three-phase circuits, making it an ideal main or feeder protective device in modern electrical systems. When paired with matching OEM load centers and panelboards, it provides a clean, reliable upgrade path or replacement option that maintains original performance characteristics.

Key features and benefits

• Amperage rating: 400 A of continuous protection for large feeders and distribution paths
• Voltage rating: 600 V, suitable for common commercial and light industrial power networks
• Poles: 3-pole configuration for three-phase protection
• Type: Thermal-magnetic molded case circuit breaker, delivering coordinated protection with predictable trip curves
• Design: Compact form factor optimizes panel space and simplifies installation
• Compatibility: Specifically designed to be used with matching OEM load centers and panelboards for reliable fit and performance

Why this model stands out

• Space-efficient protection in crowded enclosures without compromising current carrying capacity or response time
• Thermal-magnetic trip unit provides accurate overload protection and fast short-circuit interruption, reducing gear wear and downtime
• OEM-compatible design means straightforward replacement or upgrade within Eaton and compatible panelboard ecosystems

Ideal use cases

Use the HMCP400D5C to guard large feeder circuits and branch circuits in:

• Residential service panels that require robust 3-phase protection for larger electrical loads
• Commercial panelboards in offices, retail spaces, and light industrial facilities
• Subpanels and main distribution panels where space is at a premium but protection needs are high

Choose the HMCP400D5C when you need a reliable, high-current, 3-pole solution that aligns with Eaton panelboard ecosystems. Ensure proper alignment with the panelboard’s bus configuration and follow standard electrical practices and NEC guidelines during installation. This unit is designed to work as a direct replacement or upgrade within compatible Eaton and OEM panelboard systems.