I’ll PM you with the schematics of the board I am working on. It’s only 10A at that point but will give you the correct idea. Later I will post it public however I have not tested it yet. Check your board mailbox.
Edit: Look the SMCJ24CA part (TVS Diode).
Edit2: For high voltage you will need a thyristor TVS. Please don’t electrocute yourself.
Edit3: Low voltage schematics
