Westinghouse | JB3100 | Circuit Breaker | 100A | 3-Pole | 600V

The Westinghouse JB3100 circuit breaker is a purpose-built solution for upgrading and maintaining three-phase electrical systems. With a 100-amp rating, a 3-pole design, and a 600V maximum, it’s engineered to protect feeders and motors in commercial and light industrial panels. This unit is a reliable choice for projects that demand exact spec matching and dependable overcurrent protection.

Why choose the JB3100 for your project? Its exact specifications align with legacy installations, helping you minimize downtime during maintenance, retrofit, or replacement. By sticking to the original part reference, you preserve panel architecture and protective characteristics, reducing the risk of compatibility issues.

Key specifications

• Amperage: 100A
• Poles: 3-Pole
• Voltage: 600V
• Part number: JB3100

Compatibility and installation considerations

• Confirm fit and ratings before ordering—the JB3100 reference is your best indicator for compatibility with Westinghouse panels and legacy installations.
• Ideal for maintenance, retrofit, and replacement projects where exact spec matching is required.
• Ensure power is fully de-energized and follow standard electrical safety practices during installation; professional installation is recommended for all three-phase circuits.

Who this is for

• Electrical contractors and facilities teams performing panel upgrades or replacements.
• Manufacturers and OEMs integrating or updating three-phase protection in commercial or light industrial environments.
• Maintenance technicians seeking a direct-spec replacement to minimize downtime and maintain system continuity.

When you need dependable, spec-accurate protection for three-phase systems up to 600V, the Westinghouse JB3100 100A 3-Pole circuit breaker delivers a precise, drop-in replacement that keeps your electrical infrastructure running smoothly.