I am a fan of the PW ZW transformers and recently I have added Eaton Miniature In Line Circuit breakers, part number WMZS1C03. They are rated for 3 amps and work very efficiently. These have replaced my 7amp fast blow glass auto fuses.
You can get then online anywhere from $9.00 to $18.00 dollars each.
I need to do more studying on these TVS items.
jeff