temperature coefficient of resistance (TCR)

The temperature coefficient of resistances, Temperature Coefficient of Resistances( TCR), shows the dependence of the resistance value on temperature.

In general, the temperature dependence of resistors is linear. This means that the resistance value increases linearly with increasing temperature, which is causally related to the movement of free electrons in the resistor. The higher the temperature rises, the more the free movement is restricted. At extremely low temperatures, a temperature is reached at which the transition from conductor to superconductor occurs in some metals.

The Temperature Coefficient of Resistance (TCR) results from the resistivity of the metal, the amplitude of the atomic motion, the temperature and - inversely proportional - from the free electrons.