Power supply: 230V Single-phase Rated current: 4A Frequency: 50/60Hz Control signal: PWM for phase control (0 to 5V) Index of protection: None (open board)Dimensions: 50W x 107H x 40D Input/output characteristic: Curve The MCHRTF series electronic devices are single-phase voltage controllers that use the principleof phase control to adjust the effective voltage output to the load, based on the phase of thePWM control signal. One typical application is the speed control of single-phase condenser fan motors, based on the pressure or the temperature measured on the heat exchanger. The MCHRTF controllers are protected against short circuit with a fuse located on the outsideof the board, thus allowing easy inspection and replacement, where necessary (refer to Table 3 for the correct replacement of the fuse). Always check with the manufacturers that the motorsused are suitable for operation with phase control devices.