[ARC5] AC Motor Start Caps as Filters

[Kenneth G. Gordon]

On 23 Mar 2020 at 22:20, Roy Morgan wrote:

> 
> I remember a report quite some time ago now from a fellow who spoke in person with an 
> engineer at a manufacturer and asked about the dc rating of such capacitors. The engineer 
> laughed and said the practical dc rating would be something like four times the peak of the rms 
> ac rating.

OK. Then, if I have my figures correct, the peak AC rating for 125V RMS would be 1.414 X 
125 = about 176 V which X 4 = 707 VDC. So, 1200 MFD at 700 VDC.

Sounds like a darned good filter cap to me!!! :-)

Ken W7EKB