Connect with us

Equivalent for 2N3904

Discussion in 'Electronic Components' started by Dave, Feb 9, 2005.

Scroll to continue with content
  1. Dave

    Dave Guest

    Could anybody with a copy of towers etc. give me an equivalent for a 2N3904

    TIA
    Dave
     
  2. 2N3904

    BC547 or 2N2222 should work for general purpose work.
     
  3. Dave Platt

    Dave Platt Guest

    That part can probably be accurately described as a "jellybean" - it's
    an NPN switching transistor, Ft 300 MHz, good up to an absolute limit
    of 40 volts and 200 mA.

    They're quite common and easy to come by, I believe. If you can't
    find one, then unless there's something exotic about your application
    you can probably substitute a PN2222A. 2N4401 might also work (Ft is
    a bit lower), and I have no doubt that there are a zillion other
    substitutes which would work OK in many circuit applications.
     
  4. Dave

    Dave Guest

    Cheers guys,

    Have some 2N2222's kicking around - somewhere!
     
  5. The BC547 has a bit more gain, and the reverse pinout, but should work
    okay. The 2N2222 is a metal case TO-18 with the different pinout, and
    is a bit higher power. The 2N4124 it almost the same, except the max
    collector voltage is only 25VDC.

    But it seems to me that using the 2N3904 is the best idea, because
    they're as common as dog doo-doo.
     
  6. If you do an Ebay search there are currently quite a few 2N3904 transistors
    available for an exact replacement.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-