Re: SEPIC Capacitor


"John Popelish" <jpopelish@xxxxxxxx> wrote in message
news:NqCdnSkULuZ2VvveRVn-uA@xxxxxxxxxxxxxxx
> AJ wrote:
>
>> Does anyone know how can I figure out the RMS current capabilities of any
>> given capacitor??
>
> The RMS current rating is based on the heat produced as the current passes
> through the internal series resistance of the cap and the temperature rise
> that heat produces escaping from the cap. If you can't find an RMS
> current rating on a data ***, it is pretty hypothetical.

Thanks again for you reply, you have been very helpful to me both now and in
the past! I do have another question though...

Say I have a capacitor with a D.F of 2.5% and have calculated an Xc of 1.6R,
ignoring temperature, can I work out the ESR as, 0.025 x 1.6 = 40mR and then
from that the current from I = sqrt(P / ESR)?

Regards,

AJ


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