Newbie level 3
I am a newbie to power electronics but can understand the basics. My very specific question is, whether a snubber circuit is needed for a triac that is driven by an optocoupler that is based on zero-crossing, like MOC3043?
Hi Barry, thank you for response. So, if I understood you correctly, since it is zero cross voltage, current might still not be zero which can cause undesirable effect. in this case, what type of capacitor is ideal. should I go for capacitors at some rated AC voltage of like 275VAC or a smaller one will do as we only deal with current?I think it depends on the application. If you've got an inductive load, where current and voltage are 90 degrees out of phase, you might still need a snubber.