The single-phase thyristor power controller in economy circuit works in pulse group operation with underlying U-control. The device shows all process and configuration parameters clearly on an LC display and is easy to operate using 4 buttons on the front. Process errors are reported by a fault signal relay. Process values can be output to an analog output. Areas of application are wherever larger resistive and inductive loads have to be switched, e.g. B. in industrial furnace construction and plastics processing.