At 07:55 AM 2/6/2006, Larry G. Nelson Sr. wrote: >You do not want to use a transorb for a repetitive application like >this. Transorbs have a limited life. Every spike they see shortens >this life. When they fail, and they will, they usually fail shorted >causing even more problems. >Larry Hi there, Larry. Can you point me to some data that supports this? I know that MOVs have an associated wear factor but I've NEVER seen anything similar that in regards to a Transorb. I use a LOT of Transorbs in various places and the only failures I can associate with them is when dealing with severe load dump issues in heavy earth-moving machinery. Subsequent investigation revealed that the peak power ratings on the failed devices were exceeded by at least an order of magnitude. In other words, not the fault of the TVS. But I've not aware of any "wear" issues with TVS devices and would very much like to confirm or deny that. dwayne -- Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 22 years of Engineering Innovation (1984 - 2006) .-. .-. .-. .-. .-. .-. .-. .-. .-. .- `-' `-' `-' `-' `-' `-' `-' `-' `-' Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist