Eaton Cutler-Hammer HMCP400Y5C 400A 3P 600V Circuit Breaker | AmpState

The Eaton Cutler-Hammer HMCP400Y5C is a robust circuit breaker built for everyday electrical work, delivering dependable circuit protection in panelboards, load centers, and electrical distribution networks. With a 400 A rating and three-pole design, this unit is engineered to safeguard three-phase feeders while simplifying retrofit planning and long-term maintenance where the part number needs to stay constant.

Key specifications

• Brand: Eaton Cutler-Hammer
• Part Number: HMCP400Y5C
• Amperage: 400 A
• Poles: 3
• Voltage: 600 V
• Application: Circuit protection in panelboards, load centers, and electrical distribution

What makes this breaker stand out

• Part-number consistency for retrofits: Designed for situations where the exact replacement part number matters, helping you keep spare parts aligned with your existing inventory and panel catalogs.
• Reliable protection for high-current, three-phase systems: The 400 A, 3-pole configuration is ideal for safeguarding sizable feeders and multi‑panel installations across commercial and light industrial environments.
• Straightforward compatibility with Eaton ecosystem: A seamless fit where Eaton Cutler-Hammer components are already in use, reducing guesswork during maintenance or panel upgrades.
• Practical for retrofit and maintenance planning: Ready to deploy in projects where maintaining a consistent part number simplifies ordering, stocking, and future service visits.

Ideal use cases

• Upgrading or replacing protection for three-phase feeders in panelboards and load centers.
• Retrofit projects where keeping the same part number minimizes compatibility concerns and reduces downtime.
• Maintenance planning for facilities with Eaton electrical distribution systems, ensuring ready access to a compatible 400 A, 600 V breaker.

How to determine fit and get support

If you’re confirming compatibility or matching a part number to your existing equipment, AmpState offers assistance. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

Available from AmpState, the HMCP400Y5C is a practical, no-surprises choice for professionals who value consistent parts, reliable protection, and clarity in maintenance and retrofit planning.