Reply to thread

Your input voltage is 154V (as per your sketch) .. so don´t be surprised if the capacitor voltage also goes up to 154V.

And the FET should widthstand 200V..

As FvM states .. don´t use a TVS on a voltage that is higher than the TVS´ standoff voltage.

And a TVS is not a very accurate device ... so read te datasheet carefully about how to operati it safely (worst case conditions).

The voltage may vary from piece to piece, with tempertature, with aging....

Klaus