NTC thermistor is composed of the oxide of Co, Mn, Ni, Fe, and other
transition metals, made by high-sintering, semiconductor processing technology, and with various encapsulation types.
Thermistor products manufactured by our company are featured by complete varieties, adjustable and designable parameters, good performance, high precision and good exchangeability.
Characteristic parameters of thermistor: resistance, B value, dissipation coefficient, time constant.  

● Rated zero-power resistance: R 25℃
● B value: indicates the resistance-temperature change regularity of thermistor, and the calculation formula is as follows:

            

Where, R₁ & R₂ is the resistance at T₁&T₂, and B corresponds to the material coefficient at T₁&T₂.
● Dissipation coefficient: ratio of thermistor consumption power to temperature change, and the calculation formula is as follows:

       

● Time constant T:
Under zero-power, and when the temperature changes abruptly, the time that thermistor takes to change 63.2% of temperature difference of the beginning and the end temperature.
T is in direct proportion to thermal capacitance C of resistor, and in inverse proportion to dissipation coefficient δ。

       

● Temperature- resistance characteristics: the temperature-resistance characteristic curve is as follows:

                     

            R – zero-power resistance      T – absolute temperature K°