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What's the difference c639 and bc639 Transistor

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Discussion in 'Electronic Basics' started by Web Master, May 11, 2004.

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  1. May 11, 2004 #1
    Web Master

    Web Master Guest

    Went to buy a bc639 transistor but was given a c639 is this the same thing ?
     
  2. May 11, 2004 #2
    John Jardine

    John Jardine Guest

    ?

    It is.
     
  3. May 11, 2004 #3
    Joe McElvenney

    Joe McElvenney Guest

    Hi,
    Maybe NOT!

    What is the can style of the C639? If it's TO-18 then it is probably
    a 2SC639 which is quite different to the BC639 (TO-92). It has a lower
    collector voltage and power rating but a much higher fT (375MHz).
    The connections are in a different arrangement/order to boot.


    Cheers - Joe
     
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