2.719" overall length 2.719" overall width elec rating 120 vac max rated voltage, 5 amp resistive current rating at max rated voltage; motor 120 vac, 400 hz; 2 terminals for motor/9 for contacts; rated operating time 900 sec; contact spdt, 3 positions; explosion-proof; four 0.166 in. dia mtg holes on 2.156 x 2.156 in. mtg ctrs