RTH42 Military grade silicon thermistor 10 ohms +/- 5% at room temp (25ºC ) increasing to 47.25 Ohms @ 125ºC used in temperature compensating ciurcuits. Range : 6.15 ohms@ -55ºC 7.9 ohms@ -15ºC 8.63 ohms@ 0ºC 11.6 Ohms @ 50ºC 13.5 ohms @75ºC 15.45 Ohms @ 100ºC 17.5 Ohms @ 125 ºC S.I. Code 40-529-1060-27U to: MIL-T-23648/ (A) 19 NSN: 5905-01-029-8250 marked: RTH42 ES27OJ glass, hermetically sealed 300mW at 25ºC 125mW @ 125ºC range -55 to 125ºC dims: 7.2 x 2.4mm dimeter (leads o.52 x 50mm long) status: NOS ( New Old Stock) - ex military aviation supplier.(original ducumentation / inspection certificates available) sample retested 14/2/14 100% pass rate. RoHS : NA