Hello,

I want to create some solid state relays controlled by ESP32. The loads will be up to 15A (110v). So the live wire would enter in AC IN #1 and exit from AC IN #2 to be switched.

1. Do I need more resistors on the AC side? How can I know the resistance needed between the fuse and the optocoupler? I wrote 150 but I can be totally wrong. And do I need a 1/2W, 1W or more?

2. The capacitor on the DC side is needed?

3. I think I should add a snubber circuit because it would be used with different loads?

Thank you very much!

 

Have you seen the app notes from Fairchild?
AN-3006 & AN-3003.

 

Have you seen the app notes from Fairchild?
AN-3006 & AN-3003.

Thank you for the recommandation, I'm going to read them now