Eaton HMCP400W5 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton HMCP400W5 is a robust 400 A, 600 V, 3-pole molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. With a compact molded-case footprint, it helps you maximize panel space without sacrificing protection performance. Its thermal-magnetic trip unit provides stable, repeatable protection across varying loads and ambient conditions, giving you peace of mind in demanding electrical environments.

• Compact molded-case design optimizes panel space and simplifies installation in dense panelboards and load centers.
• Thermal-magnetic trip unit delivers precise overload and short-circuit protection with predictable trip characteristics.
• OEM-ready compatibility designed to pair with matching Eaton OEM load centers and panelboards for seamless, plug‑in integration.
• Versatile for multiple sectors suitable for residential, commercial, and light industrial electrical distributions where reliable protection is essential.

• Amperage rating: 400 A
• Voltage rating: 600 V
• Poles: 3
• Type: Thermal-magnetic molded case circuit breaker
• Part number: HMCP400W5
• Application: Branch circuit overcurrent and short-circuit protection

Ideal for three-phase power distribution in commercial buildings, light industrial electrical rooms, and service panels, the HMCP400W5 protects feeders and motor circuits up to 400 A from overloads and short circuits. Use it to safeguard HVAC feeders, large lighting runs, and other high-current branch circuits while maintaining clear alignment with Eaton panelboard ecosystems for straightforward replacement and maintenance.

Why this breaker stands out is not just its specs—it's how it fits into a practical electrical strategy. The 3-pole design supports balanced three-phase systems common in commercial and light industrial settings, while the 600 V rating supports higher-voltage distribution without compromising protection accuracy. When you need reliable, configurable protection that aligns with your existing Eaton infrastructure, the HMCP400W5 offers a cohesive, performance-driven solution.

Practical installation and maintenance tips:

• Pair with compatible Eaton panelboards and load centers to ensure alignment of mounting, bus stabs, and trip characteristics.
• Confirm that the circuit’s current and voltage requirements stay within the 400 A and 600 V ratings to avoid nuisance trips or insufficient protection.
• Document the part number HMCP400W5 in your panel schedules for clear maintenance records and future replacements.