Westinghouse | 504C336G17 | Circuit Breaker | 125A | 3-Pole | 415V

The Westinghouse 504C336G17 circuit breaker is engineered for dependable protection in 3-phase electrical systems. With a 125A rating, this 3-pole unit is designed for 415V installations, making it a precise match for industrial and commercial panels that run on three-phase power.

Designed for maintenance, retrofit, and replacement projects, this Westinghouse circuit breaker arrives with the exact part number 504C336G17—your quickest path to compatibility and a straightforward swap in existing panels. Before you order, confirm fit and ratings to ensure seamless integration in your distribution setup.

Key specifications at a glance

• Amperage: 125A
• Poles: 3-Pole
• Voltage: 415V
• Part reference: 504C336G17
• Best candidate for: maintenance, retrofit, and replacement where exact spec match is required

Who is this for

Ideal for facilities with three-phase distribution networks that operate around 415V, including industrial machinery rooms, manufacturing floors, data centers with modular power systems, and commercial buildings undergoing panel upgrades. If you’re replacing an aging breaker in a Westinghouse-compatible panel or upgrading a feeder from a lower capacity, this 125A, 3-pole unit is purpose-built to slot into the same footprint and interface with the same bus connections as the original equipment.

Why it matters

Using the exact Westinghouse 504C336G17 reference reduces the risk of misfit and compatibility issues that can happen with generic substitutes. The 125A rating gives you a balanced protection for high-demand loads while preserving selectivity within the panel’s overall protection scheme. The 415V rating ensures you stay within the electrical system’s voltage envelope, delivering reliable performance in regional power configurations that rely on 3-phase power.

Practical tips for installation and use

Before purchasing, verify that your panel supports 3-pole breakers and a 415V nominal supply, and that the panel’s labeling aligns with the 504C336G17 part number. When replacing an existing breaker, document the original amperage, pole count, and voltage rating to confirm you’re maintaining the system’s protection philosophy. During installation, follow standard electrical safety practices and local codes, and test the circuit after re-energizing to confirm proper operation.