Identity a SOT-23 transistor marked MO5 or M05

[Jonathan Schneider]

I'm fixing a laptop and am trying to identify a transistor which I
believe may be popped. Well I assume that's what it is. It has all
three legs connected.

It is SOT-23 and marked MO5 or could be M05 (letter Oh or digit zero).

There are a couple of others onboard and I believe it's part of the
power supply.

Any ideas ?

Thanks,

Jon

 

[Jonathan Schneider]

Best guess is not a tranny but a dual zener (like part WOST05C) with
common anodes on the middle pin. Probing others onboard adds credence
to this though I'm very much open to suggestions.

Jon

 

[Franc Zabkar]

Best guess is not a tranny but a dual zener (like part WOST05C) with
common anodes on the middle pin. Probing others onboard adds credence
to this though I'm very much open to suggestions.

Jon

I haven't checked all of the following, but they appear to be similar
parts with the same marking code:

http://www.microsemi.com/datasheets/MSC1378.PDF (SM05)
http://www.secosgmbh.com:8081/datasheet/products/TVS/SC-59/SMD03C~SMD36C.pdf
(SMD05C)
http://soft.laogu.com/datasheet/103/PJSMS05_PANJIT_87495.pdf (PJSMS05)
http://www.datasheet4u.com/html/S/M/3/SM36TC_SemtechCorporation.pdf.html
(SM05)
http://www.datasheetarchive.com/pdf-datasheets/Datasheets-40/DSA-791422.pdf
(WOST05C)

- Franc Zabkar

 

[N_Cook]

They generally use code numbers, not part of the actual number. There
are a couple databses on line like this one to help identify SMD semis.

http://www.marsport.org.uk/smd/mainframe.htm


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Are manufacturer's allowed to put whatever code they like on devices ?
So is it possible to have 2 functionally different devices (on same
package?) with the same code ?