Square D P7-120/150 Air Compressor Pressure Switch with unloader is a single-port device rated for 24 amps and calibrated for a 120–150 psi operating range. Identified by the P7-120/150 model, this switch controls an air compressor motor by responding to tank pressure within that range. It includes an unloader valve to vent residual pressure as the cycle ends, a common feature in Square D compressor switches. This unit is designed for standard air compressor circuits requiring a 120–150 psi setpoint range and a 24-amp electrical rating.
