> MOC301x is ok for use in the US - in countries with 220 or 240VAC you > will need MOC302x optos.
Hadn't thought of that. The app note has a schematic for using two in series to switch 240v. Also, I meant to say "alternistor" not alternac. They have better zero-crossing snubbing than a regular triac, but I'll probably switch to a ZC opto for the next board (looking at the Toshiba SMT ones; they're much smaller).