Westinghouse | HKD3400T56W | Circuit Breaker | 400A | 3-Pole | 600V

The Westinghouse HKD3400T56W circuit breaker delivers reliable overcurrent protection for demanding 3‑phase systems. With a robust 400A rating, a 3‑pole configuration, and a 600V maximum, this unit is purpose-built for maintenance, retrofit, and replacement projects where precise compatibility matters.

Key specifications at a glance

• Amperage: 400A
• Poles: 3‑Pole
• Voltage: 600V
• Part number: HKD3400T56W
• Best reference for compatibility: confirm fit and ratings before ordering

Why this Westinghouse breaker stands out

Unlike generic substitutes, the HKD3400T56W is designed to align with specific panel and system requirements. Its 3‑pole design ensures coordinated opening and shutdown across all phases, a critical factor in protecting equipment and maintaining safe operation in three‑phase networks. The 600V rating accommodates a wide range of industrial and commercial applications, giving you a dependable solution for higher-energy environments while keeping installation straightforward for retrofit projects.

Ideal use cases

• Maintenance and service‑level replacements in existing electrical panels where exact specifications are required
• Retrofits that upgrade protection without altering downstream wiring or panel architecture
• New or rebuilt three‑phase circuits needing a reliable 400A, 3‑pole, 600V protective device

Practical considerations for installation and compatibility

Before ordering, verify that the HKD3400T56W matches your equipment’s exact specifications. The part number is the most reliable reference for compatibility, so cross‑check it against your panel’s labeling and service documentation. When installing, follow standard electrical safety practices and ensure the circuit is de‑energized during replacement to protect personnel and equipment.

How it compares to other solutions

For projects requiring precise compatibility and coordinated three‑phase protection, the HKD3400T56W offers a clear alignment with Westinghouse panels and assemblies. It’s built to slot into established electrical architectures without the guesswork that comes with generic breakers, helping you minimize downtime and avoid mismatches that can complicate future maintenance.

Helpful notes for procurement

To ensure seamless ordering and installation, keep the part number HKD3400T56W on hand as your primary reference. Confirm that the application is within the 600V range and that the panel and bus assembly are compatible with a 3‑pole, 400A device. This approach reduces the risk of incompatibility and supports a smoother commissioning process.