Temperature Coefficient of Resistance (TCR)

Temperature coefficient of resistance (short for TCR) means when the temperature of the resistor changes 1 centigrade, the resistance value changes accordingly, and the unit is ppm/℃. There are negative temperature coefficient, positive temperature coefficient and critical temperature coefficient that resistance occurs at a particular temperature.

The temperature coefficient of resistance is a parameter that is closely related to the microstructure of a metal and has a theoretical maximum in the situation of no any defect. In other words, the magnitude of the temperature coefficient of resistance itself characterizes the performance of the metal process to a certain extent. In the development of new technology processes or on-line monitoring, we can use the temperature coefficient of resistance to evaluate the reliability of the metal for early monitoring and rapid assessment

Why is the temperature coefficient of resistance (TCR) important? Because the temperature changes on the resistance value of the resistance has a great influence. For example, a plane from tens of degrees environment to tens of degrees below zero environment, a few hours later from a few dozen degrees below zero to tens of degrees environment, the resistance will change with the temperature changes, either The resistance of a thin-film resistor or a thin-film resistor is affected by changes in ambient temperature.