Eaton HMCP400K5C 400A 3P 600V Circuit Breaker | AmpState

The Eaton HMCP400K5C is a purpose-built circuit breaker engineered for reliable overcurrent protection in panelboards, load centers, and electrical distribution systems. Designed for three-phase applications, this 400 A, 3-pole device delivers solid performance in demanding environments where precise protection and quick, predictable tripping are critical. When your operation relies on clean, consistent power delivery, choosing the exact part number matters—and HMCP400K5C is a direct-fit match for Eaton-compatible panels and distribution equipment.

• Amperage: 400 A
• Poles: 3
• Voltage: 600 V
• Manufacturer: Eaton
• Part Number: HMCP400K5C

What makes this breaker a smart pick

For maintenance teams, panel builders, and stockrooms, having the exact part-number match simplifies ordering, reduces replacement downtime, and keeps electrical systems running smoothly. The HMCP400K5C is specifically selected when a direct Eaton part is required, ensuring compatibility with Eaton panelboards and load centers and avoiding the risks of mismatched substitutes.

Ideal use cases

• Industrial and commercial panelboards where 400 A protection is needed for a three-phase circuit.
• Load centers in manufacturing facilities, data centers, and large commercial offices that operate on 600 V systems.
• Spare inventory for service fleets and maintenance teams that standardize on Eaton components for faster, more predictable replacements.

Benefits in practice

• Direct part-number compatibility minimizes installation guesswork and helps ensure correct fit and performance in Eaton-specific assemblies.
• Robust three-pole design supports balanced protection across three-phase systems, contributing to safer, more reliable electrical distribution.
• By stocking the HMCP400K5C, facilities can streamline maintenance workflows, reduce downtime, and improve uptime metrics for critical infrastructure.
• AmpState availability provides a straightforward procurement path, helping you secure the exact Eaton breaker you need without hunting through generic substitutes.

How this compares to alternatives

While many breakers offer similar amperage and voltage ratings, the HMCP400K5C is a genuine Eaton part built to integrate seamlessly with Eaton’s distribution equipment. This alignment minimizes compatibility concerns, supports standardized installation practices, and helps ensure that protective coordination remains consistent with your existing protection schemes. If your project or service plan specifies an Eaton HMCP series component, this part is purpose-built to fulfill that requirement.

Practical tips for selection and care

• Verify that your panelboard or load center requires an HMCP400K5C with a 3-pole, 400 A, 600 V rating before ordering.
• Keep a dedicated spare for critical systems to shrink downtime during maintenance or unexpected outages.
• When receiving the part, check labeling and packaging to confirm it matches HMCP400K5C and that the stock is from a reputable source like AmpState.
• If you’re unsure about compatibility, message AmpState for assistance with fit confirmation—they offer guidance to ensure correct match for your Eaton distribution equipment.

Ready to secure a precise fit for your Eaton panel system? The Eaton HMCP400K5C 400 A, 3-pole, 600 V circuit breaker is available from AmpState, designed to support reliable protection and straightforward integration in your electrical distribution setup.