Siemens Z-AC-0789 Pressure Switch

Siemens Z-AC-0789 (ZAC0789) is a genuine replacement pressure switch for air compressors that uses sensed tank pressure to control the motor, turning the compressor on when pressure falls toward the lower setpoint and off again when the target is reached, thereby regulating runtime and maintaining system pressure. It is commonly used as a direct replacement for Porter-Cable and Craftsman compressors, including CPFC2TV3525VP and models 919167780/919167770, allowing technicians to restore original cycling characteristics without modifying other components. The switch specifies a 175/145 psi switching range, a configuration that is widely used in consumer-grade compressors, with fittings and electrical interfaces that align with typical compressor control heads. By installing the Siemens Z-AC-0789, you replace a worn or failed pressure switch with a part that adheres to the original equipment specifications for these platforms, contributing to reliable pressure control and motor protection.