Siemens | QJ2B175 | Circuit Breaker | 175A | 2-Pole | 240V

Meet the Siemens QJ2B175 Circuit Breaker — a purposeful, high-current protection solution engineered for reliability in 240V electrical systems. With a 175A rating and 2-pole configuration, this breaker is designed for demanding loads and retrofit projects where exact compatibility matters. Built to align with Siemens’ QJ2 family, it’s the right choice when replacement or modernization requires matching specifications and trusted performance.

Why this model stands out

• Exact amperage and configuration — 175A, 2-Pole, 240V safeguards large circuits such as heavy appliances, HVAC feeders, and subpanel feeds, delivering dependable overcurrent protection where it’s needed most.
• Compatibility by design — part number QJ2B175 ensures you’re selecting a device tuned for panels that accept the Siemens QJ2 series, minimizing guesswork during maintenance or retrofit.
• Maintenance and retrofit ready — it's purpose-built for replacement scenarios, allowing you to upgrade or restore existing panels without changing the overall protection strategy.
• Direct-fit installation — matched mounting and terminal configurations reduce installation time and align with standard Siemens wiring practices for secure, reliable connections.

Specifications at a glance

• Amperage: 175A
• Poles: 2-Pole
• Voltage: 240V
• Part number: QJ2B175

Ideal use cases

This circuit breaker is well-suited for:

• Large residential or light commercial panels needing a robust 240V protection for main feeders or heavy-duty branch circuits.
• Retrofit projects where existing equipment requires an exact Siemens-compatible replacement to maintain panel integrity and warranty alignment.
• Upgrading aging protection in equipment rooms, workshops, or facilities with high-current loads that demand reliable interruption during faults.

Practical guidance for a smooth fit

Before ordering, verify your system’s requirements against the specifications above. The part number is the most reliable reference for compatibility, and confirming fit and ratings helps prevent misselection. If your panel documentation references the QJ2B175, you’re aligning with the exact Siemens protective device designed for your 240V, 2-pole application.

With the Siemens QJ2B175, you’re choosing a proven, purpose-built circuit breaker that delivers clear protection for demanding 175A 240V circuits, backed by Siemens engineering and a track record of dependable performance in retrofit, maintenance, and replacement projects.