Siemens | QJ3B175 | Circuit Breaker | 175A | 3-Pole | 240V | Bolt-On

Designed for robust overcurrent protection in 3-phase, 240V systems, the Siemens QJ3B175 circuit breaker is a bolt-on solution built for reliable performance in maintenance, retrofit, and replacement projects. With a 175A rating across three poles, this unit delivers consistent protection where your electrical system needs it most.

• Amperage: 175 A
• Poles: 3-Pole
• Voltage: 240 V
• Mounting: Bolt-On
• Part Number: QJ3B175

Key advantages that set the Siemens QJ3B175 apart

• Precise 3-pole protection for balanced three-phase circuits, reducing the risk of uneven load and nuisance trips.
• Bolt-on mounting design enables secure, field-replaceable installation with compatible Siemens panels.
• Tailored for retrofit and replacement projects where exact specs matter—no guessing on compatibility.
• Compact 3-pole 240V configuration fits a wide range of Siemens panels designed to accept bolt-on breakers.

Ideal use scenarios

The Siemens QJ3B175 is ideal for service and maintenance work, retrofits in aging electrical installations, and replacements where a 175A, 3-pole, 240V bolt-on breaker is required. It helps maintain system safety in commercial, industrial, and multi-zone electrical setups that rely on reliable three-phase protection.

Compatibility and ordering tips

Compatibility tip: Confirm fit and ratings before ordering. The part number is the best reference for compatibility with your panel and bus configuration.

Designed with Siemens-quality construction, the QJ3B175 is a dependable choice when you need a precise, bolt-on 3-pole breaker that aligns with 240V systems. Keep your panel protected and your maintenance schedules on track with this exact replacement from Siemens.