143 Series, 5,08 mm [0.2 in] disc thermistor with leads, 100 Ohm resistance, ±10.0% tolerance, 25/85 BETA = 3468 140 Series, 142 Series and 143 Series Thermistors are available in a broad range of custom resistance values and R/T curves. Leads are uninsulated. Diameters range from 2,54 mm [0.1 in] to 10,16 mm [0.4 in]. They are available on tape and reel.