Tempco
Tempco, short for temperature coefficient, is a parameter that describes how a physical quantity changes with temperature. In electronics and materials science it is usually expressed as a fractional change per degree Celsius, commonly in parts per million per degree Celsius (ppm/°C). For resistance, the temperature coefficient of resistance (TCR) is defined as TCR = (1/R0) dR/dT. Similarly, the temperature coefficient of capacitance (TCC) and of inductance (TCL) describe how those properties vary with temperature. Positive tempco means the property increases with temperature, while negative tempco means it decreases.
Materials and devices with low or near-zero tempco are valued for stability. Examples include certain metal
Measurement and design considerations: manufacturers specify acceptable tempco over a given temperature range, and designers account
See also: coefficient of thermal expansion, drift, temperature stability.