Discrete Thermistor Thermistors are electrical resistors whose resistance differs notably with temperature variations when compared to standard resistors. Their name is derived from the portmanteau of thermal and resistor. These thermistors are generally used in consumer electronics, PCB temperature sensing, communications, fire detection, computers, automotive, and low-cost applications. 135-104LAG-J01 Thermistor from Honeywell is a hermetically-sealed, glass-encapsulated thermistor. This Honeywell 135-104LAG-J01 thermistor is available in an axial lead package. With a high-temperature range of -60 °C to 300 °C [-76 °F to 572 °F], this Honeywell Thermistor delivers robust performance.