At 06:48 AM 3/14/2012, Xiaofan Chen wrote: >Also why you say JS relay is not good? It should be good >since the creepage distance between the relay coil pins and >the relay contact have more than 8mm distance (center to >center is about 12.2mm). >http://pewa.panasonic.com/assets/pcsd/catalog/js-catalog.pdf The fixed contacts have lots of room but the armature pin is located=20 between the two coil pins. Using 75 mil pads on all pins (0.075")=20 results in a clearance distance of about 4.2mm - far less than the 8mm figu= re. dwayne --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .