> Sorry, didn't know that. I though they were all made up of optically > coupled triacs, which is the AC variant. Optically coupled triacs??? (insert stupid look here) On a SS relay??? No, nothing much more than a transistor array with medium forward bias and PN junction. Never took one apart, but they are pretty simple. Yeah, but don't you still have a .3 - .7 volt drop across the junction? -RDH