How to choose a thermistor, should pay attention to what issues?

The type and model of the thermistor(Metal Oxide Varistor) more choose which one thermistor should be determined according to the specific requirements of the circuit.

Positive temperature coefficient thermistor (PTC) is generally used for refrigerator compressor starting circuit, color picture tube degaussing circuit, the motor overcurrent overheat protection circuit, current limiting circuit and thermostatic electric heating circuit. MZ-01 ~ MZ-04 series, MZ81 series, MZ91 series, MZ92 series and MZ93 series, such as commonly used in the thermistor has the starter circuit of the compressor. Can be selected according to the different types of compressor suitable for the thermistor it starts, start to achieve the best effect. Color television sets, computer monitors degaussing thermistor (Metal Oxide Varistor)  MZ71 ~ MZ75 series. According to TV, monitor the operating voltage (220V or 110V), current and degaussing coil specifications, the choice of the nominal resistance, the maximum starting current, maximum working voltage and other parameters are in line with the requirements of degaussing thermistor. Current limiting power thermistors PTC MZ2A ~ MZ2D series, MZ21 series, motor overheating protection MZ61 series PTC thermistor nominal resistance switching temperature, operating current and power dissipation parameters should be used to conform application circuit requires models.

Negative temperature coefficient thermistor (NTC) is generally used in a variety of electronic products for microwave power measurement, temperature detection, temperature compensation, temperature control and regulator with the appropriate type and model selection should be selected according to the needs of the application circuit . The common temperature detection series NTC thermistor MF53 and MF57 series, each series has a variety of models (the same type, different models of the NTC thermistor, standard resistance is not the same) to choose from. Common regulator with NTC thermistor MF21 series, RR827 series the thermistor voltage regulator can be selected based on the value of the reference voltage application circuit design values ​​and operating current. Temperature compensation, temperature control with NTC thermistor MF11 ~ MF17 series. Common temperature measurement and temperature control with NTC thermistor MF51 series, MF52, MF54 series, MF55 series, MF61 Department, the MF91 MF96 series, MF111 series, such as variety. MF52 series, MF111 series NTC thermistor is suitable for a temperature range of -80 ℃ ~ +200 ℃ temperature measurement and temperature control circuit. Series MF51, MF91-MF96 series NTC thermistor is suitable for temperature measurement and temperature control circuit 300 ℃. The MF54 series MF55 series NTC thermistor for temperature measurement and temperature control circuit in the 125 ° C or less. MF61 series MF92 series NTC thermistor applies to 300 ° C above the temperature measurement and temperature control circuit. NTC thermistor temperature control range meets the requirements of the application circuit, should pay attention to the chosen temperature control thermistor (Metal Oxide Varistor) .