I have an automotive application where I have this:
Would the 20V 1W or 5W zener diode be enough together with a typical automotive fuse to protect the LCD drive in case there is a voltage spike. Fuse would be 2A as it should be enough for the normal operation of the driver and screen. The RBO40-40 clamps to 40V so there could be still some over voltage after it.
Edit: I have understood crowbar is useful for over voltage situations but in my case I am mostly worried about very short voltage spikes.