normally open relay; continuous input voltage of 30.0 vdc; input resistance 450.0 ohms; operating temperature range negative 30.0 degrees celsius to a positive 100.0 degrees celsius; dimensions: length 2.280 in. max, width 1.780 in. max, height 0.895 in. max; 4 screw terminals; 2 unthreaded holes for mounting spaced 1.865 in. min