Siemens FJ2-B125 Circuit Breaker, 125A, 2-Pole, 600V

The Siemens FJ2-B125 Circuit Breaker is built for industrial electrical service, maintenance, and replacement projects. This two-pole device delivers reliable overcurrent protection for circuits up to 600V, with a 125 A rating, helping protect equipment and minimize downtime in demanding environments.

What sets the FJ2-B125 apart

• 125 A, 2-pole design provides simultaneous protection and disconnection for both conductors in a circuit.
• 600 V maximum voltage rating makes it suitable for a wide range of industrial distribution applications.
• Part number FJ2-B125 serves as the key compatibility reference for matching with your panel or enclosure.
• Engineered for industrial service, maintenance, and replacement projects where dependable protection matters most.
• Clear, straightforward compatibility check: verify fit by part number and application requirements.

Key specifications

• Manufacturer: Siemens
• Part Number: FJ2-B125
• Type: Circuit Breaker
• Amperage: 125 A
• Poles: 2
• Voltage: 600 V

Ideal use cases

• Industrial electrical service panels, machine control circuits, and feeder mains that require robust protection.
• Maintenance and replacement projects where quick, reliable circuit protection is essential to minimize downtime.
• Applications that demand a two-pole disconnect to de-energize double-insulated or multi-conductor circuits safely.

Compatibility and support

Verify fit by part number and application requirements to ensure seamless integration with your equipment. If you need help matching a part number or confirming compatibility, send us a message—our team can assist with specifics to get you a clean, proper match.