BC 337 and BC 327

Discussion in 'General Electronics Chat' started by rijoe.mathew, Sep 22, 2014.

  1. rijoe.mathew

    Thread Starter Member

    Sep 21, 2014
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    How to identify the emitter, base and collector of BC 337 and BC 327
     
  2. panic mode

    Senior Member

    Oct 10, 2011
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    you download and read datahseet
     
  3. ISB123

    Well-Known Member

    May 21, 2014
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    [​IMG]
     
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  4. studiot

    AAC Fanatic!

    Nov 9, 2007
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    Careful to check the datasheet for your supplier.
    There are many variations in the pinouts of these transistors.

    If you have a multimeter you can identify NPN and PNP and the ebc terminals by identifying the diodes.
     
  5. rijoe.mathew

    Thread Starter Member

    Sep 21, 2014
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    please advice how to do that
     
  6. Jony130

    AAC Fanatic!

    Feb 17, 2009
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    Check this
    bc337.jpg
     
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  7. wmodavis

    Well-Known Member

    Oct 23, 2010
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    Data sheets are king! If you don't use/read 'em - you lose. If you don't know how to read 'em - learn how.
     
  8. adam555

    Active Member

    Aug 17, 2013
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  9. studiot

    AAC Fanatic!

    Nov 9, 2007
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    A transistor can be considered as two back to back diodes for test purposes as in the top of the rather haasty sketch.

    So if you set a multimeter on the ohmsx100 range and watch the meter (either digital or analog, but analog is best) and apply the leads to the collector base diode one way and then reverse the leads you will get readings as shown.
    Note I have shown an NPN transistor, a PNP one will work the same with the red and black reversed.

    Then you can do the same with the base emitter diode and finally with the collector emitter pair.

    trtest3.jpg

    You should check a known good transistor first to see what happens.
     
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