Eaton HKD3400T52W - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Eaton HKD3400T52W, a rugged 400 A, 600 V, 3-pole bolt-on molded case circuit breaker purpose-built for dependable branch circuit protection in panelboards and loadcenters. Designed to handle the demands of residential, commercial, and light industrial applications, it delivers consistent protection where it matters most while fitting seamlessly into Eaton-compatible systems.

• Secure bolt-on mounting: delivers a rigid, vibration-resistant connection to the bus, reducing movement and maintaining reliable electrical contact over time.
• Thermal-magnetic trip unit: combines time-delayed overload protection with instantaneous magnetic trip for fast, stable responses to both sustained overcurrents and short circuits.
• OEM-compatible design: specifically engineered to integrate with matching Eaton loadcenters and panelboards, ensuring straightforward installation and reliable coordination with existing equipment.
• High-capacity protection: 400 A at 600 V makes it suitable for main feeders and large branch-circuit protection in multi-series panel configurations.

The HKD3400T52W isn’t just a breaker—it’s a solved problem for complex electrical distributions. Its thermal-magnetic mechanism provides predictable trip behavior, helping prevent nuisance trips while preserving protection when it’s truly needed. The 3-pole configuration supports balanced protection across three-phase systems, which is essential for motors, compressors, and other inductive loads common in commercial and light industrial settings.

• Amperage rating: 400 A
• Voltage rating: 600 V
• Poles: 3
• Mounting style: Bolt-on
• Type: Thermal-magnetic molded case circuit breaker
• Part number: HKD3400T52W
• Manufacturer: Eaton
• Application: Branch circuit overcurrent and short-circuit protection

Who benefits most from this breaker? facilities managers, electrical contractors, and panel technicians seeking reliable, OEM-compatible protection that minimizes downtime and ensures protection margins across varied loads. It’s especially well-suited for upgrading or expanding panelboards in commercial spaces or light industrial environments where large feeders and robust fault protection are essential.

In practice, the HKD3400T52W delivers predictable protection curves, reduces the risk of nuisance trips in fluctuating load scenarios, and simplifies integration into existing Eaton ecosystems. If you’re stocking your service fleet or outfitting a new control panel, this bolt-on molded case breaker from Eaton provides the reliability, compatibility, and performance you expect from a trusted industry standard. Available through AmpState, it carries authentic Eaton engineering and is ready to support your electrical distribution needs.