I'm suffering the usual weekend brain death!
What are the considerations when selecting tvs diodes? Is the thinking the same as selecting a regular zener?
The answer is probably painfully obvious, but I'm struggling to see it.
Example: say I'm switching a 5 volt coil relay with 100ma turn-on current via a transistor from the mcu and the transistor is switching with 10ma. The load the relay is switching is for example 240 volts/ 8 amps. To protect the mcu I would like to add tvs diode from the mcu signal to ground. What value/ratings should I be considering?