Three functions of NTC thermistor

　　NTC thermistor is a thermistor with negative temperature coefficient. Its resistance value decreases with the increase of temperature, and the change of resistance value changes according to the change of ambient temperature. Therefore, it is often used as temperature measurement. The temperature range is generally -10 ~ +300 ℃, but there are also thermistors that can measure higher temperatures. One of its more important parameters is the rated zero-power resistance value and accuracy, that is, the resistance value at 25 ℃, we It is often said that the resistance value of the thermistor has actually defaulted to the resistance value at 25 ° C. The NTC thermistor is composed of mixed oxide polycrystalline ceramics. Different packages with different materials

　　Chip type NTC thermistor. The most important thing about the chip type thermistor is small size and no lead, which is very suitable for surface mount production. This chip thermistor is mainly used in LCD, temperature compensation circuits of various instruments and equipment, temperature measurement of batteries, various microprocessors and chip temperature measurement, etc.

　　Glass sealed NTC thermistor. As the name implies, it is a glass package with a heat-sensitive chip inside. It is characterized by small size, fast response, high precision, and anti-aging. Because it is a glass package, it is more suitable for use in harsh environments such as high temperature and high humidity. There are generally three types of resistors: chip type, single-ended glass seal and axial diode. If it is a plug-in, there are tin-plated pins. This kind of thermistor is very common. Many of us have basically come into contact with this type, which is widely used. It is used for temperature control and temperature detection of various household appliances and office automation equipment.

　　Epoxy encapsulated NTC thermistor. This NTC thermistor chip is soldered on various leads and encapsulated with epoxy resin. It is characterized by: smooth surface without burrs, black (or other colors) epoxy resin infusion, and resin infusion is full without bubbles. Small size, fast response, high measurement accuracy, long-term stable work and good consistency. Mainly used in temperature measurement, control and compensation, high-precision instrumentation

　　Small head diameter enameled wire NTC thermistor. This is also encapsulated in epoxy, with a solid structure and a precision temperature sensor. There is a thermal insulation coating wire on the outside of this resistor, also called copper enameled wire. The existing conventional wire diameters include Ø0.18mm, Ø0.3mm and enameled wires with different wire diameters. It is widely used in electronic thermometers, electronic desk calendars, mobile phone batteries, lithium-ion battery packs and various instruments and equipment that require different leads.

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