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Does AC Solenoid requires fly back diode?

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xmen_xwk

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I need to control washing machine's water solenoid using a simple relay. Now, since solenoids are same as inductors, I believe it will make some spikes when relay is off and can cause sparks. But since it's AC Solenoid, how do suppose to put a fly back diode at solenoid's ends?

I have put a diode on signal side of relay as safety but what about at switching side of relay?

I also measured the current, it takes 23mA and it looks like this.

AC-220V-Plastic-solenoid-valve-washing-machine-solenoid-valve-normally-closed-inlet-valve-releas.jpg
 

To protect against inductive transients in a AC circuit when you switch an inductive coil you can use a transorb type transient suppressor or an RC (in series) suppression circuit in parallel across the coil.
 
Use an RC network, the capacitor must have at least a 600V DC working voltage or be rated as class X or Y. I would use a 10 kPF @1 KV disc. The resistor?, try 100 ohms 1/4 W not surface mount.
Frank
 
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