On 07/04/2021 21:42, ARW wrote:
Am I correct in saying that it does not matter if there is a LN reversal
on the input?

It will always have a correct +/- DC voltage.

The DC voltage across the capacitor will be the same, the difference:
one way it will be referenced to neutral, ie close to ground, and the
other will have 230V superimposed on the capacitor terminals.

If an electrolytic capacitor then diode polarity will be very important.

What are you trying to do?