It should be BSS100 which is the same as BSS123.

http://users.etech.fh-hamburg.de/users/gelab/DownLoad/BSS123.pdf
http://www.fairchildsemi.com/ds/BS/BSS123.pdf

Djula



>It's a Siemens fet with the following marking:
>
>$  d5
>S   S
> 100
>
>Where "$" is the siemens logo. Its in a TO-92 style plastic package
>(2N3904 look-alike.) "d" in the first line is in lower case and the two
>"S"es on the second line have a injection molding round mark between
>them which is why they are so far apart.
>
>Anyone knows what this FET is?
>
>Thanks,
>
>Shahid

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