Century, 24 Hour Dial Heavy duty mechanical time switch w/metal case. 120 to 480 volts, 24 hour time switch control. The Century Series provides 1 to 12 “ON/OFF” operations each day with minimum ON/OFF times of 1 hour. All models are equipped with One “ON” and one “OFF “ tripper. 40 Amp pole, 208-277V, 5 HP.