> voltage unit. In such a case, you'd either have to go with two FETs per > channel with steering diodes and messy drive circuitry, or a bridge > rectifier per channel between the FET and the line to be switched, again > increasing losses due to diode drops. The steering diodes are already in the FETs, just tie the FETs in series with gates together and sources together. However the $$ of that is pretty high so I would imagine it would be for mansion lighting and not theatrical lighting. High voltage FETs with low on resistance are not cheap and driving them isolated is also spendy. If the original poster would give details about the application we could either sympathize or tear him apart :-) Cheers, Bob -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics