Paschen's law
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Paschen's Law, named after Friedrich Paschen, was first stated in 1889. It states that the breakdown voltage of a gap is a non-linear function of the product of the gas pressure and the gap distance:
- V = f(pd)
where p is the pressure and d is the distance.
The theoretical relationship for the direct current breakdown voltage of two parallel-plane electrodes immersed in a gas, as a function of the gas pressure and electrode separation, is the Paschen curve.
This relationship predicts the occurrence of a minimum breakdown voltage for a certain product of the pressure times the separation. The phenomenon is well verified experimentally and is referred to as the Paschen minimum.
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