Eaton HMCP400W5C - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Eaton HMCP400W5C — a rugged, high-capacity 3-pole molded case circuit breaker designed to protect your critical electrical infrastructure. With a 400 A rating and a 600 V maximum, this device provides reliable branch circuit overcurrent and short-circuit protection for panelboards and loadcenters, ensuring your distribution system stays safe and up-and-running.

Why the HMCP400W5C stands out

• Compact molded case design conserves panel space while delivering robust protection, making it ideal for crowded or retrofit panelboards.
• Thermal-magnetic trip unit delivers stable, repeatable protection—responding to both overloads and short circuits with predictable coordination for easier system planning.
• OEM-compatible engineered to pair with matching OEM loadcenters and panelboards for straightforward installation and reliable interoperability.
• Versatile for multiple sectors suitable for residential, commercial, and light industrial applications, delivering consistent performance across varied environments.

Where you’ll use it

• New panelboard installations in homes, office buildings, retail spaces, and light industrial facilities
• Upgrades or replacements in existing electrical distributions where dependable overcurrent protection is required
• Distribution to protect key branch circuits from overloads and fault currents with a three-pole configuration for 3-phase systems

Performance in practical terms

With the HMCP400W5C, you gain predictable protection that minimizes nuisance trips while providing fast fault detection. The three-pole architecture supports balanced three-phase distribution, helping to maintain stable voltages across all phases. Its molded case construction is engineered for durability in daily service, reducing maintenance and replacement costs over time.

Technical snapshot

• Manufacturer: Eaton
• Part Number: HMCP400W5C
• 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 in panelboards and loadcenters

How this helps your system

Choosing the Eaton HMCP400W5C means prioritizing safety, reliability, and compatibility. It reduces downtime by delivering dependable fault protection, simplifies stocking and maintenance through OEM-friendly design, and optimizes space in compact electrical panels. Whether you’re safeguarding a residential subpanel, a commercial distribution center, or light industrial equipment, this breaker delivers clear, measurable value in real-world scenarios.

Tips for best results

• Verify your panelboard or loadcenter is compatible with HMCP-series breakers to ensure reliable operation and coordinated protection.
• Plan for three-phase distribution needs where a 3-pole breaker is the appropriate choice to balance loads.
• Keep spare units on hand for faster replacements during scheduled maintenance or unexpected faults to minimize downtime.