What is thermistor?

  • (noun): A semiconductor device made of materials whose resistance varies as a function of temperature; can be used to compensate for temperature variation in other components of a circuit.
    Synonyms: thermal resistor


A thermistor is a type of resistor whose resistance varies significantly with temperature, more so than in standard resistors. The word is a portmanteau of thermal and resistor. Thermistors are widely used as inrush current limiters, temperature sensors, self-resetting overcurrent protectors, and self-regulating heating elements.

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Some articles on thermistor:

Inrush Current Limiter - Thermistor
... An NTC thermistor's resistance is high at low temperatures ... When the circuit is closed, the thermistor's resistance limits the initial current ... After some time current flow heats the thermistor, and its resistance changes to a lower value, allowing current to flow uninterrupted ...
Microwave Power Meter - Thermal
... be divided into two main categories, thermocouple power sensors and thermistor-based power sensors ... Thermistor-based power sensors such as the Agilent 8478B are generally only used in situations where their excellent linearity is important, as they ...
Pulmonary Artery Catheter - Technical Developments - Thermal Dilution
... balloon tip, Ganz used Fronek's idea and added a small thermistor (temperature probe) about 3 cm behind the tip ... As this cooler fluid passes the tip thermistor, a very brief drop in the blood temperature is recorded ... By attaching both the injector site and the ventricular thermistor to a small computer, the thermodilution curve can be plotted ...
Inrush Current Limiter - Selection Consideration
... •IMax - The first critical consideration in the selection of a thermistor is the maximum steady state current (AC or DC) of the power supply ... thermistor are rated for maximum continuous current ... Therefore, the thermistor must have an IMAX rating of at least 1.2 Amps ...
Thermistor - History
... The first NTC thermistor was discovered in 1833 by Michael Faraday, who reported on the semiconducting behavior of silver sulfide ... Because early thermistors were difficult to produce and applications for the technology were limited, commercial production of thermistors did not begin until the ... The thermistor was invented by Samuel Ruben in 1930 ...