Schneider Electric 9013FHG12J52X Air Compressor Pressure Switch

Schneider Electric's Square D 9013FHG12J52X Air Compressor Pressure Switch with Unloader is a compact Pumptrol control that automatically starts and stops a small compressor motor based on reservoir pressure, featuring a bottom-mounted unloader valve to vent head pressure for smoother restarts. This DPST switch in the 9013FHG family is factory-set for 95–125 psi, with an overall operating range commonly cited around 70–150 psi and a differential near 30 psi, and it includes an On/Off lever for manual control. The integrated unloader valve reduces starting current by venting residual pressure when the switch opens, aiding easier motor restart. Common listings describe the 12J52X variant as a 95–125 psi model designed for use with air compressors, incorporating a bottom-mMounted unloader configuration suitable for shop and light-industrial applications.