SMD Device Marking

[OzFlyGuy]

Hello,

I've got a PC motherboard that has a 3 legged device on it - presumably a
transistor, FET etc .... with the markings N1D1 on it ...

Anybody got any clues what it might be ?

Thanks, Ian

 

[[email protected]]

I've got a PC motherboard that has a 3 legged device on it - presumably a
transistor, FET etc .... with the markings N1D1 on it ...

Or a voltage regulator, or a shunt-type regulator, or a general-
purpose diode, or a temperature sensor, or ... ... ...

 

[ian field]

Hello,

I've got a PC motherboard that has a 3 legged device on it - presumably a
transistor, FET etc .... with the markings N1D1 on it ...

Anybody got any clues what it might be ?

Thanks, Ian

Try this:-

http://www.tkb-4u.com/code/smdcode/smdcode1.php

 

[Franc Zabkar]

Hello,

I've got a PC motherboard that has a 3 legged device on it - presumably a
transistor, FET etc .... with the markings N1D1 on it ...

Anybody got any clues what it might be ?

Thanks, Ian

Is there a circuit reference on the PCB, eg Qnn, Dnn? Can you tell us
what components are nearby?

- Franc Zabkar

 

[Frank]

another one

SMD Marking Codes beginning with ............
http://clivetec.superihost.com/SMD_Codes0.htm








Hello,

I've got a PC motherboard that has a 3 legged device on it - presumably a
transistor, FET etc .... with the markings N1D1 on it ...

Anybody got any clues what it might be ?

Thanks, Ian

 

[Sergey Kubushin]

Unfortunately enough they are all for small packages with cryptic marking.

I do have a couple of tubes with some ST Micro transistors (?) or something
that I can not identify. And ST Micro itself is of no help -- they don't
have their markings available from their site and 90% of their PDF
datasheets don't tell you what the markings are...

My parts are in D-Pack (TO-252) and have ST logo and 3 lines of text on
them:

ST(logo) CHN
K922
LD338

Can anybody tell what it is?

another one