Eaton | HKD3400T106W | Circuit Breaker | 400A | 3-Pole

Eaton HKD3400T106W is a 400 A, 3-pole circuit breaker engineered for demanding electrical layouts where robust protection and reliable operation matter.

Designed for maintenance, retrofit, and replacement projects, this breaker slides into Eaton-compatible panels and disconnects with precision when faults occur, helping prevent downstream equipment damage and unplanned downtime.

• Amperage: 400 A
• Poles: 3-Pole
• Part number: HKD3400T106W
• Application: Maintenance, retrofit, and replacement in compatible Eaton systems

Why choose this specific unit? The dedicated part number ensures you’re getting the exact trip curve, mechanical interlock, and terminal configuration required by your panel. This isn’t a generic fit—it’s a precise match for Eaton installations demanding 400 A three-phase protection.

Ideal for:

• Industrial control panels and distribution systems with three-phase loads
• Service upgrades where a 400 A main or feeder protection is required
• Legacy panel retrofits where compatibility with HKD3400T106W is specified

Practical considerations and tips:

• Before ordering, confirm fit and ratings using the part number HKD3400T106W as the primary reference for compatibility.
• Inspect the panel’s interrupting rating to ensure it matches or exceeds your system’s fault current.
• For maintenance or replacement projects, verify the existing wiring terminals and torque specs align with this three-pole 400 A device.
• Use in three-phase installations where stable protection is critical to avoid nuisance trips in high-demand equipment like motors and drives.

With Eaton’s reputation for reliability and the specificity of the HKD3400T106W designation, this circuit breaker provides not just protection, but confidence—keeping your electrical system running smoothly, with fewer interruptions and faster service restoration after faults.