On Aug 30, 3:28*am, Ross Herbert wrote:
On Sat, 29 Aug 2009 11:53:54 -0700 (PDT), "

wrote:

:I have an alarm board with two shorted surface mount diodes. These are
:about the size of a quarter watt carbon resistor only just a slight
:bit fatter. They are marked: MX6AA and MX50AA. Can anyone please
:identify these for me? Thanks, Lenny.

Are they glass MELF style or moulded plastic similar to either of these photos?http://img.alibaba.com/photo/1078070...SMD-Diodes.jpg

My first guess would be 1W zeners so perhaps you can check to see if they have
6V and 50V ratings respectively (assuming they are not dead).
They are not round more like flat and they are definitly shorted.
Lenny