What is TCR?

USR 2-0808 TCR characteristics

The resistance value of a resistor changes with temperature and TCR stands for Temperature Coefficient of Resistance, which indicates that when the temperature changes by 1℃, there will be a relative change of resistance value in ppm/℃. The resistance value will return to its initial value when the temperature returns to normal temperature.

Calculation formula: TCR=((R2-R1)/R1(T2-T1))*10^6


R1: Resistance (Ω) measured under room temperature
R2: Resistance (Ω) measured at -55℃ or +125℃ for example
T1: Room temperature.
T2: -55℃ or +125℃ for example