The heavy duty mechanical time switch is designed for industrial, commercial and residential applications. Features a high horsepower rating that is ideal for loads up to 40 amps resistive from 120-volts and direct 24-hour time switch control of most loads. All models are equipped with one "ON" and one "OFF" tripper. The unit contains a 1-circuit standard On/Off 1NO/1NC (can be wired SPDT) 40 Amps, 4000 watt capacity, 208-277 VAC 60 Hz.