> I'm kind of confused; Isn't a Schottky diode a fast recovery diode? PS I meant to include a link to the 1N58xx http://www.st.com/internet/analog/product/62111.jsp You'll note that Schottkys are much more sensitive to temperature than other fast diodes, and that they will run away thermally Compare for example the leakage currents. 1N58xx (2000uA @ 100C) vs BYV28 (150uA @ 150C) Joe --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .