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Showing Results For: Thermistor ICs

Thermistor ICs

What are thermistor ICs?

A thermistor is installed in a broad selection of circuitry and printed circuit boards for temperature assessment, also for the current-limiting monitoring system. The resistance alteration of a thermistor is based on the ambient temperature of the component. The conduction model is used to classify thermistors. Thermistors with a positive temperature coefficient (PTC) exhibit more resistance at higher temperatures than thermistors with a negative temperature coefficient (NTC). As a result, the resistance of a PTC thermistor is inversely proportional to temperature.

Types of thermistor ICs

Depending on the materials used, thermistors are classified into two types:

  • With an NTC thermistor, resistance decreases as the temperature rises, typically due to a rise in conduction electrons raised by thermal excitement from the valence shell. An NTC is typically used as a temperature detector, or in a sequence with a circuit as an inrush voltage confiner.
  • With PTC thermistors, withstand raises as the temperature rises, commonly due to enhancement in thermal lattice excitement, especially those that are not refined and imperfect. PTC thermistors are typically used in series with a circuit board and are employed to secure and resist overcurrent circumstances through resettable fuses.

Typical applications

  • As an alternative to fuses, as current-limiting devices for circuit protection. A minor degree of resistive heating results from current flowing through the device.
  • Most CRT displays use them as timers in the degaussing coil circuit. The thermistor and degaussing coil both experience current flow when the display unit is first turned on.
  • In the automobile industry, a heater is used to heat the diesel before engine injection in cold climates or to offer additional heat to the cabin when using a diesel engine.
  • In voltage-controlled oscillators for temperature-compensated synthesizers.
  • To provide the heat required to cause the wax to expand in an electrically powered wax motor.

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NCP18XM472J03RB, Murata

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GAG10K3976A1, TE Connectivity

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TE Connectivity G10K3976 Series Radial Glass Thermistors TE Connectivity's MEAS G10K3976 radial glass thermistors feature a wide operating temperature range and offer high stability and performance in harsh environmental conditions. The NTC chip is protected by a hermetically sealed glass encapsulation that provides a high level of resistance in humid environments. Suitable applications include hot water boiler systems, engine temperature control sensors, assembly into probes, refrigeration control, air conditioning systems and environments where humidity and thermal shock are present. Economical Fast time response Hermetically sealed glass encapsulation package Large operating temperature range from -40ºC to +250ºC
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NTC0805 Series SMD NTC chip thermistors offering a high thermal sensitivity in a standard 0805 case size Suitable for temperature compensating circuits and other applications requiring a resistance that varies according to the ambient temperature The thermistor should be derated linearly from 100% at 55°C to zero at 125°C These components are supplied unmarked, on 8mm wide tape Optimum working dissipation 1mW Dimensions L.2, W.1.25
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