The Intermatic T103M Timer Mechanism is the internal mechanism only for Intermatic T103 model timers and time clocks. The heavy duty T103M Time Switch Mechanism is designed for industrial, commercial and residential applications and has the highest motor load ratings in the industry. It provides up to 12 ON-OFF operations daily with a minimum ON-OFF time of 1 hour. T103M Timer Mechanisms are 125 Volts and have a switch rating of 60 Hz.