It seems many questions to this forum do not give enough info for a good answer, so here is my attempt (I hope this is clear enough). I am in the process of designing a new product and would like to automate the calibration. At present on a similar product we use solder jumpers (lack of a better name) to short 1 of 3 possible gain resistors into the circuit. Does anyone out there know of a fusible link or anti-fuse (again lack of a better name) that would be usable with the following criteria: 1. SMT 2. Circuit operates in the less than 10mA range (link must fuse in 100mA to 500mA range) 3. Available for high volume production (if this works it could go into the millions of units per year) So as to not clog the net, please contact me off-line and I will post findings later for other interested parties. Frank N Kimmey EM Designer C&K Systems, Inc. (916) 353-5366 [log in to unmask] Thanks for the help! FNK