PTC is a positive temperature coefficient thermistor and NTC is a negative temperature coefficient thermistor.
PTC thermistors are used in circuit control and sensors, electric heating appliances and automobiles, compared with nickel, chromium wire or far infrared heating components, PTC thermistors mainly have the special functions of constant temperature, temperature regulation, automatic temperature control, non-combustion, safety and reliability, power saving, long life, simple structure, and wide voltage range.
NTC thermistors have the characteristic that the resistance value changes correspondingly with the change of temperature. NTC thermistor has the characteristics of high sensitivity, good stability, fast response, long life and low cost. NTC thermistor can be widely used in temperature measurement, temperature compensation, and inrush current suppression.