contact data, spst, normally open, ref dwg group 217, electrical ratings, ac, 220 v max, 1 amp resistive current rating, 2 amp max resistive current rating, 115 v rating at max rated current; heater data, ac, dc, 2.5 v rating, 2 w rating, not rated for current; terminal data, 2 heater terminals, 4 terminals for contacts; hermetically sealed; glass enclosur; ambient temp range compensated for operation from minus 55 deg c to plus 70 deg c; rated for actuation time; o/a dim., excl terminals, 2.500 in. lg, 0.875 in. dia; mounts into 9 pin miniature socket