My watch list  

Paschen's law

Paschen's Law, named after Friedrich Paschen, was first stated in 1889.[1] 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.


  1. ^ Friedrich Paschen (1889). "Ueber die zum Funkenübergang in Luft, Wasserstoff und Kohlensäure bei verschiedenen Drucken erforderliche Potentialdifferenz". Annalen der Physik 273 (5): 69-75. doi:10.1002/andp.18892730505.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Paschen's_law". A list of authors is available in Wikipedia.
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE