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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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NXFT15XV103FA2B150, Murata

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GAG10K3976A1, TE Connectivity

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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PRG18BC6R8MM1RB, Murata

POSISTOR® PRG Series 0603 and 0805 Chip Type PTC Thermistors for Overcurrent Protection POSISTOR® PRG series 0603 and 0805 chip type PTC thermistors for overcurrent protection with resettable function enabling repeated use. These POSISTOR® PTC thermistors have a rapid operation in overcurrent conditions. This series is suitable for use as current limiting resistors and as a countermeasure to short circuit testing. Features & Benefits: Rapid operation in an overcurrent condition Overcurrent protection with resettable function, can be used repeatedly Can be used as current limiting resistors Dimensions LxWxT 1.60 x 0.80 x 0.80 mm

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NTCS0603E3222FMT, Vishay

NTCS0603E3.....T Series Glass Protected NTC Thermistors NiSn terminations Fully glass coated and protected Suitable for wave or reflow soldering Applications include:- Temperature sensing, protection and compensation in automotive, industrial, telecom and consumer applications

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B57891M0222J000, EPCOS

NTC sensor elements are the functional basis for all kinds of NTC temperature sensors in all applications. TDK offers epoxy resin and glass-encapsulated elements for temperature ranges of up to 160°C and 300°C, respectively, as well as unleaded NTC chip thermistors for temperature measurement, e.g. in IGBT modules. These sensor elements, which are available with and without insulated leads, feature fast response times and very precise measurements. Short response time High measuring accuracy Tight B value tolerances available Epoxy resin encapsulation PTFE-insulated leads of silver-plated nickel wire, AWG 30 (50 mm) PTFE-insulated leads of silver-plated Cu wire (19 x 0.07 mm),AWG 28 (350 mm) UL approval (E69802)

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B57164K0472K000, Epcos

NTC sensor elements are the functional basis for all kinds of NTC temperature sensors in all applications. TDK offers epoxy resin and glass-encapsulated elements for temperature ranges of up to 160°C and 300°C, respectively, as well as unleaded NTC chip thermistors for temperature measurement, e.g. in IGBT modules. These sensor elements, which are available with and without insulated leads, feature fast response times and very precise measurements. Temperature measurement and compensation Wide resistance range Cost-effective Lacquer-coated thermistor disk Tinned copper leads Lead spacing 5 mm Marked with resistance and tolerance

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GA2.2K3A1IA, TE Connectivity

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NTCLE413E2103F102L, Vishay

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NTCLE100E3332JB0, Vishay

NTC Thermistors, Radial Leaded, Standard Precision FEATURES Accuracy over a wide temperature range High stability over a long life Excellent price/performance ratio APPLICATIONS Temperature measurement, compensation, sensing and control in consumer and industrial applications

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NTCLE100E3333JB0, Vishay

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GA10K3MBD1, TE Connectivity

TE Connectivity Polyimide Micro BetaCURVE NTC Thermistors (MBD) TE Connectivitys MEAS MBD series of NTC thermistor probes offer a rapid time response and are constructed with an NTC thermistor soldered to 30 AWG solid silver plated copper wire with PVDF insulation. The NTC thermistor is potted within a polyimide tube with a thermally conductive black epoxy. Ideal for use in the consumer goods and medical industries, suitable applications for these NTC probes include small medical probes, micro-flow sensing and localised temperature sensing. Rapid time response (400 milliseconds in liquids) Small tip diameter 2.2kΩ to 1MΩ resistance at 25°C ±0.2°C tolerance from 0°C to +70°C

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PTS080501B100RP100, Vishay

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Thermistor ICs

What are thermistor ICs?

Types of thermistor ICs

Typical applications

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