I looked all over the Internet and couldn't find anything. Normally it's a fairly straight forward search using the markings on the diode. This particular diode came out of a Dukane nurse call patient station:

[Linked Image from i63.tinypic.com]

Looks like "TZB 6.8A". That "B" might even be an "E". I tried every variation. On the opposite side is an "SI" which I assume stands for Silicon. Any help would be appreciated.

Last edited by Potseal; 12/27/15 11:13 PM.
A malfunction at the junction
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Dwayne