Original poster: Fucian-at-aol-dot-com In a message dated 4/12/2004 6:22:57 PM Eastern Standard Time, tesla-at-pupman-dot-com writes: Don't stack the chips. Put them in parallel next to each other. You ruin the thermal dissipation capabilities of the increased surface area by stacking. Dan But i CAN get away with using these IGBTs right? Would a driver such as hvguys self-reson. be ok? Matt