I'm building a circuit to control an AC motor using a relay.
Since the motor is an inductive load, there will be a voltage spike when the relay opens.
It seems that best practice for dealing with this voltage spike is to connect a capacitor across the load (or the relay), with a series resistor to limit inrush current to the capacitor.
why not just put a cheap, beefy MOV in parallell with the relay contacts? One example of such a MOV is the "Panasonic ERZE14A391": https://www1.elfa.se/data1/wwwroot/assets/datasheets/ERZE_series_eng_tds.pdf
What are the pros/cons of this solution?
Is the main problem that the MOV allows the voltage to rise too high, thus putting more wear on the relay than a capacitor-based solution would?