Connect with us

Identifying TO-3 transistor pins?

Discussion in 'Electronic Design' started by Mark, Dec 6, 2004.

Scroll to continue with content
  1. Mark

    Mark Guest

    How do I differentiate between the E and B pins of a TO-3 case power
    transistor? 2N3055 if I remember correctly. Thanks.
     
  2. How do I differentiate between the FIVE copies of your post I've
    received time stamped between 20:38 and 20:53?
     
  3. I read in sci.electronics.design that Terry Pinnell <[email protected]
    Ruling out referring to the time-stamp as too easy, did he use different
    coloured inks?
     
  4. Mac

    Mac Guest

    Here's how the OP in this thread appeared to me:

    Complaints-To:
    Date: 6 Dec 2004 12:53:08 -0800
    From: "Mark" [deleted]
    Injection-Info: z14g2000cwz.googlegroups.com; posting-host=128.97.31.223; posting-account=lvlPswwAAADB-_Eu3myiQu5PAg6tu_eH
    Lines: 3
    Message-ID: <>
    NNTP-Posting-Date: Mon, 6 Dec 2004 20:53:13 +0000 (UTC)
    NNTP-Posting-Host: 128.97.31.223
    Newsgroups: sci.electronics.design
    Organization: http://groups.google.com
    Path: newssvr21.news.prodigy.com!newsdbm04.news.prodigy.com!newsdst01.news.prodigy.com!newsmst01a.news.prodigy.com!prodigy.com!newsswing.news.prodigy.com!prodigy.net!news.glorb.com!postnews.google.com!z14g2000cwz.googlegroups.com!not-for-mail
    Subject: Identifying TO-3 transistor pins?
    User-Agent: G2/0.2
    X-Complaints-To:
    X-Trace: posting.google.com 1102366393 28367 127.0.0.1 (6 Dec 2004 20:53:13 GMT)
    Xref: newsmst01a.news.prodigy.com sci.electronics.design:502575
    MIME-Version: 1.0
    Content-Type: text/plain; charset=iso-8859-1

    How do I differentiate between the E and B pins of a TO-3 case power
    transistor? 2N3055 if I remember correctly. Thanks.



    ------------end OP------------

    Perhaps you should send a complaint to ? Maybe they
    know how to tell all these posts apart. ;-)

    --Mac
     
  5. Jim Thompson

    Jim Thompson Guest

    I believe the "standard" is:

    Hold device so a line _between_ the pins is horizontal, and that line
    is above the center-line of the package, then read, left-to-right, B-E

    ...Jim Thompson
     
  6. Rich Grise

    Rich Grise Guest

    No, no! You hold it so the line through both pins is _below_ the
    centerline, and then it's E-B. ;-)

    Cheers!
    Rich
     
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

-