Used on sonobuoy rec. 0.040 cu. in.; moderately rugged item; polarized; terminal mtd; wt 4.51 grams; supply voltage 12 vdc; 16.7 ma coil current; 850 ohms coil resistance; 1 amp at 28 vdc resistive; 500 ma at 115 vac resistive; 100 ma at 28 vdc lamp; 4.0 ms turn-on time; 7.5 ms turn-off time; 200 ma at 28 vdc inductive; 0.375 in. lg; 0.370 in. dia; electromechanical output w/diode coil suppression