Eaton HMCP400K5 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Eaton HMCP400K5 is a 400 A, 600 V, 3-pole molded case circuit breaker engineered for dependable branch circuit overcurrent and short‑circuit protection in panelboards and loadcenters.

Compact, panel-friendly design that fits where space matters

• Compact molded-case design maximizes panel space, making it easier to organize wiring and maintain clean, reliable distribution schemes.
• 3-pole configuration supports three‑phase systems and common bus layouts, enabling efficient protection for modern electrical installations.
• Thermal-magnetic trip unit delivers stable, repeatable protection, reducing nuisance trips and safeguarding conductors under varying loads and temperatures.
• OEM-loadcenter compatibility is designed to pair with matching Eaton panels and other OEM loadcenters and panelboards for straightforward installation and reliable performance.

Why this matters for your electrical system

Protecting feeders and branch circuits with precise, predictable trip behavior is essential in residential, commercial, and light industrial environments. The HMCP400K5’s thermal-magnetic mechanism responds quickly to overloads and short circuits, helping prevent damage to wiring and connected equipment while maintaining continuity of service where possible.

Ideal use cases

• Upgrading or expanding panelboards in small to mid‑sized commercial spaces where reliable 3‑phase protection is required.
• Installing in new construction projects to provide robust main or branch protection for critical circuits.
• Replacing aging or mismatched breakers in residential or light industrial load centers to restore stable protection profiles.

Technical snapshot

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

Choosing the Eaton HMCP400K5 means aligning with a trusted protection solution designed to integrate smoothly with Eaton’s panelboard ecosystems and deliver dependable, long‑term performance for your electrical distribution needs.