Eaton Cutler-Hammer HKD3400 400A 3P 600V Circuit Breaker | AmpState

Meet the Eaton Cutler-Hammer HKD3400, a robust 400 A, 3-pole, 600 V circuit breaker engineered for reliable protection in panelboards, load centers, and electrical distribution networks. When your retrofit or maintenance plan requires a consistent part number, the HKD3400 is the dependable choice that keeps your system aligned with existing wiring and enclosures.

Designed for environments where downtime is costly, this breaker slots into standard HKD3400-compatible assemblies, enabling quick replacements without reconfiguring panels or labels. This exact-fit compatibility translates to faster procurement, simpler stocking, and reduced risk during upgrades.

Where this breaker truly shines

• Exact-fit for HKD3400 installations: Maintains compatibility with your Eaton Cutler-Hammer panelboards and distribution gear, preserving wiring layouts and trip coordination.
• Three-pole, 400 A protection: Delivers reliable multi-phase protection across lines, suitable for demanding commercial and light-industrial circuits.
• 600 V maximum rating: Supports standard industrial and building distribution voltages, keeping you within safe operating parameters.
• Ideal for retrofit and maintenance planning: Keep your part number consistent during replacements to minimize downtime and documentation changes.
• Available from AmpState: Stocked by AmpState and backed by support to confirm fit for your specific panel configuration.

Practical use cases

Replace aging breakers in service panels and load centers without changing existing bus arrangements. Plan long-term maintenance with a readily available exact-match part, ensuring spare inventory aligns with your current HKD3400 fleet. For facilities with multiple Eaton Cutler-Hammer systems, this breaker simplifies procurement and reduces the risk of incompatible substitutes.

Why choose this over general replacements

Generic or non-OEM replacements can disrupt trip curves, labeling, and panel compatibility. The HKD3400 from Eaton Cutler-Hammer is engineered for coordinated protection within the HKD3400 family, delivering predictable response and seamless integration with your distribution network.

If you need confirmation of fit for a specific panel or bus configuration, AmpState is ready to assist in verifying compatibility, ensuring you select the exact part you need for uptime and safety.