contact data, spst, ref dwg group 217, electrical ratings, ac, 115v max, 6 amps resistive current rating; heater data, dc, 27, 5v rating, 4 w rating, .14 amp current rating; terminal data, 2 heater element terminals, 2 terminals for contacts; hermetically sealed; metal case; ambient temp range compensated for operation from minus 70 deg c to plus 70 deg c; rated for actuation time, 20 sec operating time, 1 to 2 sec release time; dim., excl terminals, 2-3/8 in. lg, 51/64 in. dia; seven pin miniature socket mounted; p/o, usaf, compass system, type j-4