What is the principle of NTC thermistor?

The negative temperature coefficient of thermistor generally refers to semiconductor materials or components with large negative temperature coefficient. NTC thermistor is a negative temperature coefficient device.

It is made of manganese, cobalt, nickel, copper and other metal oxides by ceramic technology.

These metal oxide materials have semiconductor characteristics because they are completely similar to semiconductor materials such as germanium and silicon in conductivity. When the temperature is low, the number of carriers in these oxide materials is small.

So its resistance value is high, and with the increase of temperature, the number of carriers increases, so the resistance value of thermistor decreases.

The temperature range of thermistor at room temperature is 10O~ 1000000 ohms, and the temperature coefficient is -2%~-6.5%.

Thermistors can be widely used in temperature measurement, temperature compensation, surge current suppression, temperature measurement, temperature control, temperature compensation and so on.

The composition of temperature coefficient thermistor means that the resistance decreases exponentially with the increase of temperature.

Thermistor phenomenon and negative temperature coefficient materials Most thermosensitive semiconductor ceramics are oxide ceramics with spinel structure or other structures.

The measuring range of negative temperature coefficient temperature is generally-10 ~+300℃. Thermistors can also achieve -200 ~+ 10℃, and even measure the temperature at +300 ~+ 1200℃.