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Transistor Identification

Discussion in 'Troubleshooting and Repair' started by Andre Gopee, Sep 12, 2012.

  1. Andre Gopee

    Andre Gopee

    35
    0
    Sep 12, 2012
    Can anybody identify this transistor (D549). This is all the marking on the trans. I am trying to sort out my electronic components by identifying all the different parts and this one I am not getting any data sheet for it. Can anyone help.

    Andre
     
  2. shrtrnd

    shrtrnd

    3,665
    453
    Jan 15, 2010
    What type of package is it in?
    It could be a 2SD549.
    But I've seen some thyristors (in TO-220 type packages) with 'D' prefixes.
     
  3. Andre Gopee

    Andre Gopee

    35
    0
    Sep 12, 2012
    It is in a TO127 Case style but I am still not picking up any data on this part number U gave me. I tried Mouser, NTE and Digchip. any suggestions?
     
  4. shrtrnd

    shrtrnd

    3,665
    453
    Jan 15, 2010
    All's I can do, is Gioogle it, which is what I suggest to you.
    I found references for an old D549 Thyristor, but no data sheet.
    A Toshiba 2SD549 Transistor and an
    AD549JH TO-99 8-Pin Op Amp
    I've never seen Analog Devices shorten their part number prefixes to just 'D', so that isn't it.
    Considering your package, I'd lean toward the Toshiba transistor.
    Couldn't you find a company logo on it anywhere? Maybe a date code if it looks old?
     
  5. Andre Gopee

    Andre Gopee

    35
    0
    Sep 12, 2012
    It is defiantly not an 8 pin IC so I believe it is the Toshiba Transistor. The funny thing is that the supply shop has the part but they cannot say what it is either. There is no other marking on it except for T and a .6H. I have attach a picture of the component let me know if you can make it out.
    Regards,
    Andre
     

    Attached Files:

  6. Andre Gopee

    Andre Gopee

    35
    0
    Sep 12, 2012
    It suppose to read definitely.
     
  7. alfa88

    alfa88

    324
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    Dec 1, 2010
  8. Andre Gopee

    Andre Gopee

    35
    0
    Sep 12, 2012
    Thanks Guys for the help. I have check the 2SD549 and it is definitely the part. I will keep a copy of the data sheet with that parts. Thanks again.
    Andre:cool:
     
  9. Andre Gopee

    Andre Gopee

    35
    0
    Sep 12, 2012
    Hey Guys, I need your help once more. I have attach a picture of what looks like an Optoisolator but I do not recognize the numbers which is 817CY. If any of you can assist me I would greatly appreciate it. Thanks.
    Andre
     
  10. Andre Gopee

    Andre Gopee

    35
    0
    Sep 12, 2012
    I forgot to upload the picture. Here it is.
     

    Attached Files:

  11. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,174
    2,690
    Jan 21, 2010
    This would be my guess.
     
  12. Andre Gopee

    Andre Gopee

    35
    0
    Sep 12, 2012
    Thanks Steve.
     
  13. shrtrnd

    shrtrnd

    3,665
    453
    Jan 15, 2010
    The company logo is for LiteOn.
    Your device is an LTV-817 Photocoupler (single channel, they make them in multi-channel DIPs too).
    They run about $3 each, U.S.
    Good luck
     
  14. Andre Gopee

    Andre Gopee

    35
    0
    Sep 12, 2012
    Thanks Shrtrnd
     
  15. Andre Gopee

    Andre Gopee

    35
    0
    Sep 12, 2012
    Valere Power Rectifier

    Hey Guys, I am repairing a Power Rectifier that is used in telecommunication services and I came across a part that I need the experts help to identify once again. I have attach a picture of the component for you to see.

    Regards,
    Andre
     

    Attached Files:

  16. grant1842

    grant1842

    11
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    Oct 1, 2012
  17. grant1842

    grant1842

    11
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    Oct 1, 2012
  18. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,174
    2,690
    Jan 21, 2010
  19. Andre Gopee

    Andre Gopee

    35
    0
    Sep 12, 2012
    Hi Guys its me again with another question. The board that I am repairing is soldered with lead solder and the normal 60w - 100w soldering is not melting the lead enough for the vacuume pump to remove it. any suggestion?
     
  20. grant1842

    grant1842

    11
    0
    Oct 1, 2012
    Sometimes you need to add more solder to the joint then try to use a De- Solder gun with vacuum pump.
     
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