Original poster: "Shaun Epp" <scepp-at-shaw.ca> Hello Group, While looking up information on Insulated Gate Bipolar Transistors (IGBT's) I found the following manufacturers application notes. I've uploaded them to Terrys site for anyone else interested in build DRSSTC's. enjoy. Here's the link http://hot-streamer-dot-com/temp/IGBTdata/ Shaun Epp