JohnW
pfm member
This is according to the technical director of Mundorf and Clarity Caps, the Mundorf guy thought that perhaps a small current through an over specced cap 'could' change, he had no proof though.
Clarity Caps also sponsored a study with the University of Cardiff studying ESR ,again couldn't find any correlation .
Keith.
( free range caps may be different though ? )
Well this is correct for Film dielectrics - I keep referring to the Organic "Wet" type dielectrics... You can watch there leakage current drop over hours!!!
Also - I believe its the change in ESR with temperature that's most pronounced.