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Thermistor
Type of resistor whose resistance varies with temperature / From Wikipedia, the free encyclopedia
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A thermistor is a semiconductor type of resistor whose resistance is strongly dependent on temperature, more so than in standard resistors. The word thermistor is a portmanteau of thermal and resistor.
This article's lead section may be too short to adequately summarize the key points. (February 2022) |
Thermistors are categorized based on their conduction models. Negative-temperature-coefficient (NTC) thermistors have less resistance at higher temperatures, while positive-temperature-coefficient (PTC) thermistors have more resistance at higher temperatures.[1]
NTC thermistors are widely used as inrush-current limiters and temperature sensors, while PTC thermistors are used as self-resetting overcurrent protectors and self-regulating heating elements. An operational temperature range of a thermistor is dependent on the probe type and is typically between −100 and 300 °C (−148 and 572 °F).
![]() Negative-temperature-coefficient (NTC) thermistor, bead type, insulated wires | |
Type | Passive |
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Working principle | Electric resistance |
Electronic symbol | |
![]() Thermistor or varistor symbol[2] |