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Buz103 replacement transistors

Discussion in 'Troubleshooting and Repair' started by Thor Karlsen, Dec 19, 2014.

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  1. Thor Karlsen

    Thor Karlsen

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    Dec 19, 2014
    Hi
    I have an old car amplifier with blown npn pnp pair of transistors. (Planet Audio P706)
    The transistors are Buz103 BG15 and SG14. I cant find any information on these. :(
    Anyone know of a god replacement?
    Thanks!
     
  2. chopnhack

    chopnhack

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    Apr 28, 2014
    Hi Thor, do you have pictures of the devices?
     
  3. chopnhack

    chopnhack

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    Apr 28, 2014
    Here are two possible links. I am not sure if the BG15 is a transistor or some other device, when you post the picture we can see better.

    Buz103s
    smbg15
     
  4. Thor Karlsen

    Thor Karlsen

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    Dec 19, 2014
    Yes, this is the best I can take :)
     

    Attached Files:

  5. chopnhack

    chopnhack

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    Apr 28, 2014
    Ok, for sure the BUZ link I posted is a match. Where are the other two devices?
     
  6. Thor Karlsen

    Thor Karlsen

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    Dec 19, 2014
    That's the two devices, BUZ103 BG15 and BUZ103 SG14.
     
  7. chopnhack

    chopnhack

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    Apr 28, 2014
    LOL I see it now, if I am not mistaken that is the factory/date coding.
     
    KrisBlueNZ likes this.
  8. Thor Karlsen

    Thor Karlsen

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    Dec 19, 2014
    Ahh okay :p
    Does the S mean NPN and the B PNP? Will I need a matched pair?
     
  9. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    Nov 28, 2011
    No; all four devices are the same. They're all BUZ103 N-channel MOSFETs. The date/factory codes are different, that's all.
     
    chopnhack likes this.
  10. chopnhack

    chopnhack

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    Apr 28, 2014
    Spot on :)
     
  11. Thor Karlsen

    Thor Karlsen

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    Dec 19, 2014
    Okay that simplifies things! Thanks for your help! :)
    Wasn't thinking about that they where MOSFETs :oops:
     
  12. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    Nov 28, 2011
    The G D S markings above the pins are a bit of a giveaway!
     
    Arouse1973 likes this.
  13. Thor Karlsen

    Thor Karlsen

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    Dec 19, 2014
    :p
     
  14. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Well done John, good effort.
    Adam
     
    chopnhack likes this.
  15. chopnhack

    chopnhack

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    Apr 28, 2014
    Thanks mate ;) Trying to filter the easy stuff to pay my debt :D
     
  16. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Yes easy for some, but thats why they come here for help. And you are helping so good. Keep your head In those books, make me proud John :)
     
    chopnhack likes this.
  17. chopnhack

    chopnhack

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    Apr 28, 2014
    No worries mate, I know when to step aside and call for help - I am still low on the skill front ;)
    As for the books, I did shelve them for a time. I am actively watching a series on modern electronics, about 12 hours of lecture. It is certainly very light so far, but I thought it was a better place to start than the graduate stuff I had been reading!
    I will keep you posted.
     
    Arouse1973 and KrisBlueNZ like this.
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