Eaton HKD3400T106W - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton HKD3400T106W is a 400A, 600V, 3-pole molded case circuit breaker built to protect your electrical system with precision in panelboards and load centers. Designed for versatility across residential, commercial, and light industrial environments, this breaker delivers dependable branch circuit overcurrent and short-circuit protection where space and reliability matter most.

• Compact molded case design maximizes panel space and simplifies installation, helping you fit more protection without crowding the panel interior.
• Thermal-magnetic trip unit provides stable, repeatable protection across varying currents and temperatures, reducing nuisance trips while reliably interrupting faults when they occur.
• 3-pole configuration for 3-phase protection ideal for commercial and light industrial systems that run on 3-phase power, ensuring synchronized interruption across all phases.
• OEM panel compatibility is designed to match Eaton’s own loadcenters and panelboards, promoting seamless replacement and streamlined maintenance within existing installations.
• High-capacity rating at 400A and 600V supports main feeder protection in larger panels, enabling robust fault handling and system protection for demanding applications.

Why it matters

In real-world panel installations, space, reliability, and predictable protection are non-negotiables. The HKD3400T106W delivers a compact form that doesn’t compromise performance, a thermal-magnetic trip that adapts to real operating conditions, and a design that integrates smoothly with Eaton-compatible systems. This means quicker replacements, easier maintenance, and fewer unexpected outages in both new builds and retrofit projects.

Technical snapshot

• Manufacturer: Eaton
• Part Number: HKD3400T106W
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 400A
• Voltage Rating: 600V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Protecting feeder circuits in commercial panelboards where 3-phase power is standard
• Upgrading or replacing main protection in large residential or light industrial installations
• Ensuring reliable fault interruption in panels that require compatibility with OEM Eaton load centers

With the Eaton HKD3400T106W, you gain a high-capacity, space-efficient breaker that aligns with established panel architectures while delivering durable protection you can trust under a variety of operating conditions. If you’re selecting a reliable, OEM-compatible solution for robust branch circuit protection in 3-phase systems, this 400A, 600V, 3-pole molded case breaker is engineered to meet the challenge.