Westinghouse | 504C740G09 | Circuit Breaker | 75A | 3-Pole | 600V | Bolt-On

The Westinghouse 504C740G09 circuit breaker is a rugged, three-pole, 75-amp device designed for 600-volt electrical systems. Built for maintenance, retrofit, and replacement projects, this bolt-on breaker delivers reliable protection for three-phase feeders in commercial and light industrial panels.

• Amperage: 75A
• Poles: 3-Pole
• Voltage rating: 600V
• Mounting type: Bolt-On
• Part reference: 504C740G09
• Compatibility note: Confirm fit and ratings before ordering; the part number is the best reference for compatibility.

Why the bolt-on design matters

Bolt-on mounting provides a robust, vibration-resistant connection that’s ideal for panels engineered to accept bolt-on breakers. This design supports secure bus engagement and long-term reliability in demanding environments, making it a trusted choice for installations that require solid mechanical integrity.

Ideal use cases

• Retrofit and replacement projects in panels that support 3-pole, 600V breakers
• Feeder protection for 3-phase circuits in commercial or light industrial settings
• Maintenance outages where fast, dependable swap-outs minimize downtime

What this means for your operation

With a 75A rating, this breaker helps guard circuits feeding motors, compressors, and other three-phase loads without overcomplicating the protection scheme. It targets the balance between adequate protection and efficient load handling, reducing nuisance trips while maintaining safety margins.

Installation and safety considerations

installation should be performed by a qualified electrician following local codes and the panel’s manufacturer instructions. Before ordering, verify that your panel accommodates a 3-pole, 600V bolt-on breaker and that the 504C740G09’s fit matches your equipment’s bus design and ratings. Keep the part number handy as the most reliable reference for compatibility.

How it compares to other options

In environments where vibration, panel movement, or heavy-duty service is a concern, bolt-on breakers like the 504C740G09 offer a more secure mechanical connection than plug-in alternatives. This translates to improved contact reliability, steadier electrical performance, and easier field servicing when replacements are needed.