Siemens FJ3-B175 Circuit Breaker, 175A, 3-Pole, 600V

Siemens FJ3-B175 circuit breaker delivers dependable, three-pole protection for demanding industrial environments. With a 175 A rating and a 600 V maximum, this device is built to handle robust three-phase loads, making it a solid choice for industrial electrical service, maintenance, and replacement projects. As part of the Case FJ series, the FJ3-B175 is designed for reliable duty in panel upgrades, feeders, and motor circuits where you need consistent protection and straightforward service life.

Three-pole protection for demanding industrial power

Designed for three-phase systems, the FJ3-B175 safeguards all conductors in a three-pole configuration, helping prevent damage from overcurrent conditions across motors, pumps, and other heavy equipment. Its 175 A rating aligns with medium-to-high current applications, while the 600 V rating accommodates typical plant power distributions, MCC feeds, and other industrial installations.

Key features at a glance

• Amperage: 175 A
• Poles: 3
• Voltage: 600 V
• Series: Case FJ family
• Type: Circuit breaker for industrial service, maintenance, and replacements
• Compatibility note: Verify fit by part number and application requirements

Ideal use cases

• New installations within industrial panels and switchgear that require reliable three-phase protection
• Replacement parts for existing Case FJ-series setups to minimize downtime
• Motor control center feeders and other high-current distribution circuits in manufacturing environments
• Maintenance projects where a like-for-like 175 A, 3-pole, 600 V protection device is needed

Why choose this Siemens FJ3-B175

What sets the FJ3-B175 apart is its alignment with the robust Case FJ family, offering a familiar form factor and proven performance in industrial applications. It’s a practical, readily identifiable part for technicians managing legacy installations or executing planned upgrades, ensuring continuity with existing protection schemes while meeting current electrical service demands.

Compatibility and buying confidence

Verify fit by part number and application requirements to ensure seamless integration with your equipment. Need help matching a part number or confirming compatibility? Message us and we'll help.