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SMD Device Marking

Discussion in 'Electronic Components' started by OzFlyGuy, Jun 18, 2007.

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  1. OzFlyGuy

    OzFlyGuy Guest

    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
     
  2. Guest

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

    ian field Guest

    Try this:-

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

    Franc Zabkar Guest

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

    - Franc Zabkar
     
  5. Frank

    Frank Guest

    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
     
  6. 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?
     
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