Temperature coefficient of resistance, abbreviated as \( R \) or \(TCR\), is a measure of how much a material's electrical resistance changes with temperature. It quantifies the relative change in resistance per degree of temperature change.
Temperature Coefficient of Resistance Formula |
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| \( R \;=\; R_{ref} \cdot [\; 1+ \alpha \cdot ( T - T_{ref} ) \; ] \) | ||
| 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 |
