PSR and TPSR are phase-angle control modules for currents of up to 25 A 240 VAC The load is serially connected with the modules and connected to mains voltage Connect a 250 kOhm potentiometer to the control input for a complete controller unit
The TPSR module can be connected to a 250 kOhm NTC resistor for temperature-controlled power control, this provides increased power at increased temperatures (suitable for cooling fans)
The modules have screw connections and holes for attaching screws on the heatsink