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SMD Diode Identification

Discussion in 'Datasheets, Manuals and Component Identification' started by Darren_chch, May 2, 2020.

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  1. Darren_chch

    Darren_chch

    2
    0
    May 2, 2020
    Hi, I'm hoping someone can recognise this diode. I have two that need replacing in the oscillator circuit of a large switch mode power supply and would rather not guess. Searches have got me no where. See attached images. Thanks for any help.
     

    Attached Files:

  2. davenn

    davenn Moderator

    13,984
    2,015
    Sep 5, 2009

    What is the IC ? part written in it ?

    find that and the datasheet and it will likely have an example schematic and on there will be those diodes
     
    Darren_chch likes this.
  3. davenn

    davenn Moderator

    13,984
    2,015
    Sep 5, 2009
    it mite be this one if the case code is correct

    AB - BCW60B - SOT23 BCY58-viii

    will let you identify what the SOT23 case code looks like
     
    Darren_chch likes this.
  4. Darren_chch

    Darren_chch

    2
    0
    May 2, 2020
    I believe your suggestion is a transistor, my part is most certainly a diode. Thanks anyway.
     
  5. davenn

    davenn Moderator

    13,984
    2,015
    Sep 5, 2009

    ohhh you are right ... sorry about that
     
  6. davenn

    davenn Moderator

    13,984
    2,015
    Sep 5, 2009
    so what is the IC ? .... you didn't respond
     
  7. bertus

    bertus Moderator

    2,435
    955
    Nov 8, 2019
    Hello,

    As far as I can find, it should be a SMTPB270 transient suppression device.

    Bertus
     

    Attached Files:

  8. Martaine2005

    Martaine2005

    3,999
    1,086
    May 12, 2015
    Yes, what is it?
    3T220? 3t22C? PNKE?
    I can't find anything with those numbers.

    Are there any more of the same diodes on the board?


    Martin
     
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