Re: X-class capacitor quality

I'm going through a similar exercise hand grading new x2 capacitors. Found most to be low but within 10%, just a couple at just above the value and a couple lower than 10%.

A previous batch has caused us some grief, prematurely failing in the field. Too much "self healing" causing them to go way out of spec (from 0.22uF to 0.022uF in one case).

As for dodgy components I'm always on the lookout for counterfeit parts though that usually just concerns semiconductors. Though I've got a bag of capacitors with brand x on...