Quoting Wouter van Ooijen : >> For your situation and anyone else who has had power resistors >> fail, were they within specified max operating temp (but higher than >> rated wattage)? Or did the temps go over the specified max operating > > I think the problem will be that the temperature will *locally* go over > the maximum temperature. Yes. I admittedly haven't done the math on this, but cannot imagine =20 that difference could be 100 deg C. The data/numbers others have =20 posted seem to now tell me that my "gut feel" is wrong though. Cheers, -Neil. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .