# Temperature Coefficient of Resistance

on . Posted in Electrical Engineering

Temperature coefficient of resistance, abbreviated as $$R$$, is the resistance of a conductor at any given temperature.

### Temperature coefficient of resistance formula

$$R = R_{ref} \; [1+ \alpha \; ( T - T_{ref} ) \; ]$$
Symbol English Metric
$$R$$ = resistance at temperature $$T$$ $$\Omega$$  $$kg-m^2\;/\;s^3-A^2$$
$$R_{ref}$$ = resistance at temperature $$T_{ref}$$ $$\Omega$$  $$kg-m^2\;/\;s^3-A^2$$
$$\alpha$$  (Greek symbol alpha) = temperature coefficient of resistance of the material $$F$$ $$C$$
$$T$$ = material temperature in celcius $$F$$ $$C$$
$$T_{ref}$$ = reference temperature for which the temperature coefficient is specified $$F$$ $$C$$

### Temperature coefficient of resistance material

Material / Substance Temperature coefficient of resistance / °C (at 20 °C)
Aluminum 0.00429
Brass 0.0015
Carbon -0.0005
Constantan 0.00003
Copper 0.00386
Germanium -0.05
Gold 0.0034
Iron 0.00651
Manganese 0.00001
Manganin 0.000002
Mercury 0.0009
Nichrome 0.0004
Nickel 0.00641
Platinum 0.003927
Silicon -0.07
Silver 0.0038
Tantalum 0.0033
Tin 0.0042
Tungsten 0.0045
Zinc 0.0037