ESL in capacitor model


I was just wondering why there is no attribute for the equivalent series inductance for capacitor models :slight_smile:

For any type of film capacitor, it is more of a distributed Rser/Rpar/Lser/Cpar network. Poorly described with a single lumped series L. For a ceramic capacitor, a series inductance can be a more viable representation, but usually adds no accuracy to the simulation since connecting inductance often dominates. It was a mistake to support Lser as a part of a capacitor in LTspice. It did much more harm than good. Anyway, below would be a viable equivalent schematic of a film capacitor in lumped constants between nodes A and B:


Notice there is nowhere a series inductance.

Thank you for the thorough explanation :+1:t2: