On 03/02/2011 21:30, IVP wrote: > ast this point I'm no great expert, but I would guess that a 1N5819 > is suitable if its temperature is limited. As Russell said, as a Schottky > heats up it becomes more conductive in the reverse direction and so > becomes useless as a diode, and in fact could be a liability Yes. I'd have chosen a non-Schottky, fast recovery diode. But the=20 current and operating volts decide if the 1N5819 is OK. For PIV you don't want to over specify as higher PIV is often a slower=20 diode. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .