input: opto-isolator, 3.0-32.0 vdc; output: 120.0 vac; 10.0 amps max; terminals: 4 (four) screw; mtg: 2 (two) 0.170 in. dia nom unthreaded holes placed in an in-line configuration spaced 1.870 in. c to c; length: 2.250 in. nom; width: 1.750 in. nom; height: 1.000 in. nom