Westinghouse | HKB3125 | Circuit Breaker | 125A | 3-Pole | 600V

Meet the Westinghouse HKB3125 circuit breaker — a sturdy, three‑pole protective device designed for dependable performance in 3‑phase electrical systems up to 600V. This 125A breaker is ideal for maintenance, retrofit, and replacement projects where exact specifications matter, ensuring your panel continues to protect people and equipment reliably.

• Amperage rating: 125 A
• Pole configuration: 3‑pole for three‑phase circuits
• Voltage rating: up to 600V
• Best reference for compatibility: Part number HKB3125
• Application: Maintenance, retrofit, and replacement in panels designed for the HKB series

Important fit guidance: Always confirm fit and ratings before ordering. The part number is the most reliable reference for compatibility with your panel and system. Review your panel labeling and the manufacturer's replacement part list to ensure a match.

What problems does it solve?

By providing precise current protection for three‑phase circuits, it helps prevent overloads and supports safe shutdown during faults. In retrofit scenarios, it offers a seamless replacement option when updating older equipment or panel sections to meet current codes and operating needs.

Ideal for:

Electrical service upgrades, commercial and light industrial panels, and equipment that relies on a robust 3‑pole 600V protection strategy. The HKB3125 is a practical choice when you need a straightforward, reliable replacement that aligns with existing Westinghouse/HKB framing and mounting.

Why choose this Westinghouse part?

As a genuine Westinghouse component, the HKB3125 is designed to fit the HKB series panels, ensuring consistent mounting dimensions, terminal layouts, and protective characteristics. This reduces guesswork during replacement, so you can complete maintenance or retrofit with confidence and minimize downtime.

Best practices for installation and care: engage a qualified electrician, ensure the main power is isolated, verify panel compatibility, and store the spare breaker in a clean, dry environment to prevent corrosion on terminals.