Michael Terrell wrote:

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Think again. You have a negative and a positive peak, not just a
single peak. You have to add them together.


** Nonsense, the DC rating is not exceeded by a reversing voltage.


That is why the original DC cap was 600V, not 300V.


** False.

It's simply that 600V rated caps survive much better.

AC supply and load bridging involves spike voltages that can break down the insulation.



...... Phil