Siemens Q2175BH Miniature Circuit Breaker

The Q2175BH is a high-amperage large-frame QP breaker. Due to its physical size and heat dissipation requirements, it occupies four standard 1-inch spaces (two spaces per pole) in compatible Siemens load centers.

The primary difference is the interrupting rating. The Q2175B has a standard 10kAIC rating, while the Q2175BH features a higher 22kAIC rating at 240V for systems with higher available fault current.

Yes, the Q2175BH is commonly used as a main breaker or a large branch feeder in compatible Siemens load centers, provided the panel bus is rated to accept a 175A breaker.

Yes, this breaker is HACR rated. It is approved for use with heavy-duty heating, air conditioning, and refrigeration equipment that requires a 175A circuit.

The breaker uses a dual-action mechanism. The thermal element provides long-time protection by responding to prolonged overloads, while the magnetic element offers instantaneous protection by reacting immediately to high-current short circuits.

Yes, a padlock attachment can be added to the breaker handle. This allows electricians to lock the breaker in the OFF position for safe maintenance and compliance with lockout/tagout procedures.

No, the factory-installed load side lugs are dual-rated for both copper and aluminum (Cu/Al) conductors. Ensure you apply an appropriate oxide inhibitor when terminating aluminum wire from #4 AWG to 300 kcmil.