ceramic chip capacitor leakage?

Very little, in the nA range IME. But you need to consult the data sheet which lists the maximum.

That was my opinion as well, but I haven't found a datasheet for a ceramic chip cap with leakage information in it. Do you have one? Or know where I could find one?

Thanks, Dave.

Check the data sheets and get back to us if you don't understand the specs. It is too insignificant to matter in most (not all) cases.

Best regards, Spehro Pefhany

For example, the following are datasheets for ceramic caps.

I couldn't find anything relevant to leakage in the first two datasheets. The third datasheet had some numbers for the insulation resistance, is this equivalent to Rp (parallel leakage resistance) for the part? If so, we are looking at something on the order of 1na which works for my application.

Thanks, Dave.

Insulation resistance is basically the DC leakage resistance. Here's a link to some additional info:

http://72.14.253.104/search?q=cache:L-1l-wMrAdgJ:

Chuck

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Chuck,

Perfect, that's just what I was looking for and the document is great too.

Thanks a bunch, Dave.

TDK says 10G minimum after 60s at rated voltage, at least for these parts:

Yes. The AVX spec is the lesser of 100G or 1000M-uF. Since you have

Best regards, Spehro Pefhany

If it's that critical, I suspect the leakage along the surface of the board will be greater.

Ok, Dave, I also happened to need resistance info on a 10uF/4V ceramic cap in a design today because this design uses it in a timing circuit. Here is its data sheet and the info is at the top of page 4: