Eaton HMCP400D5 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Engineered by Eaton, the HMCP400D5 is a 400 A, 600 V, 3-pole molded case circuit breaker built for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Its compact molded case design respects valuable panel space, making it a practical choice for tight electrical rooms and retrofit projects without sacrificing protection performance.

• Compact molded case design minimizes intrusion into panel space, enabling streamlined layouts in residential, commercial, and light industrial installations.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining precise overload sensing with instantaneous magnetic response to short circuits, delivering reliable trips across varying temperatures and loads.
• OEM-ready compatibility is designed to work seamlessly with matching Eaton OEM load centers and panelboards, reducing fit issues and ensuring consistent protection performance.
• 3-pole construction for 3-phase systems ideal for distributing power in panelboards and load centers up to 600 V, with a robust 400 A rating for heavy feeders and critical circuits.

Who this is for

• Electrical contractors upgrading or expanding commercial and light industrial panels where reliable 3-phase protection is essential.
• Facilities managers seeking durable, low-maintenance protection for feeders and main circuits in panelboards and load centers.
• Developers or technicians performing panel modernization in spaces where panel footprint matters but protection cannot be compromised.

Technical snapshot

• Manufacturer: Eaton
• Part number: HMCP400D5
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage rating: 400 A
• Voltage rating: 600 V
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Why choose the HMCP400D5 in your panel assembly? It delivers precise protection that adapts to real-world conditions—from busy commercial floors to compact residential service rooms—while maintaining a clean, space-conscious installation. Pair it with compatible Eaton load centers to ensure cohesive protection characteristics and straightforward maintenance, so you can protect critical circuits with confidence and clarity.