PTC thermistor temperature characteristics
- Nov 05, 2018 -

      PTC thermistor temperature characteristics:

   Resistance - temperature characteristics are commonly referred to as resistance temperature characteristics, which refers to the dependence of zero power resistance of PTC thermistor on resistance temperature under specified voltage.

   Zero power resistance, it is to point to in a certain temperature measuring, PTC thermal resistance on the power consumption on the PTC thermistor is extremely low, low to caused by the power consumption of PTC thermistor resistance changes can be neglected. Rated zero-power resistance refers to the ambient temperature of 25 ℃ under the condition of zero power resistance.

   The important parameter to characterize the temperature resistance is the temperature coefficient, which reflects the steepness of the temperature resistance curve.The larger the temperature coefficient is, the more sensitive the PTC thermistor is to the temperature change, that is, the more significant the PTC effect is, the better the performance of its corresponding PTC thermistor is, and the longer the service life is.PTC thermistor temperature coefficient is defined as the temperature change caused by the relative changes of resistance. Alpha = (lgR2 - lgR1)/(T2, T1) in general, T1 take Tc + 15 ℃ T2 take Tc + 25 ℃ to calculate the temperature coefficient.