What are the characteristics of NTC thermistor?

B value is the material constant of thermistor, that is, the chip of thermistor (a semiconductor ceramic) is sintered at high temperature to form a material with a certain resistivity, and there is only one B value at each formula and sintering temperature, so it is called material constant.

The value of b can be calculated by measuring the resistance at 25 degrees Celsius and 50 degrees Celsius (or 85 degrees Celsius). The value of B is positively correlated with the temperature coefficient of resistance of the product, that is, the greater the value of B, the greater the temperature coefficient of resistance.

Temperature coefficient refers to the change rate of resistance value for every temperature increase of 65438 0 degrees. The following formula can be used to convert the value of b into the temperature coefficient of resistance:

Temperature coefficient of resistance = b value /t 2 (t is the absolute temperature value of the point to be converted)

The B value of ntc thermistor is generally between 2000 K and 6000 K. It is hard to say whether the B value is large or small, depending on where you use it. Generally speaking, as a product for temperature measurement, temperature compensation and surge resistance suppression, under the same conditions, a larger B value is better. Because with the change of temperature, the resistance of products with large B value changes more, that is to say, it is more sensitive.

The above is the answer according to my own understanding. I do this. You can add me as a friend or send me a message if you have any questions.