15-09-2020, 07:39 AM
(15-09-2020, 06:42 AM)Jac Janssen Wrote: On the other hand, capacitors can usually withstand a much higher voltage than their rated voltage.
I bought some (very) cheap Chinese 2 kV ceramic capacitors for decoupling use, and I tested them as high as my supply would go, i.e. 3.5 kV, and there was no problem at all. During longer use and with pulses this might be different.
I have some 1n and 10n ceramics with no voltage rating marked on them. The 10n parts are about 14mm diameter discs, marked Erie .01 Z AX. The 1n parts are about 7.5mm diamter, marked 1K MAO
I felt that these would be reasonably regarded as 500V parts. They withstood 5kV (the limit of my PSU) for a few minutes. As Jac says, will they cope with long term HV and/or pulses?
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
