Connect with us

Transistor identification (and substitutes) available readily in UK

Discussion in 'Electronic Repair' started by David C. Partridge, Aug 19, 2005.

Scroll to continue with content
  1. Body marked as follows

    FPN
    4249
    EBC

    has blue paint dab on back. It's pretty clear what the EBC marking means.

    I know it is PNP from the schematic which says type is TO203 but I don't
    recognise that either.
     
  2. Probably a plastic ("PN4249") 2N4249. Dunno 'bout the "F".

    Jonesy
     
  3. Thank you.

    That was my immediate suspicion, but I don't have any specs for that - can
    anyone help with specs for the 2n4249 (assuming that is what it is) or can
    give a definitive identification?

    Web search on "2n4249 specification" didn't help much

    David
     
  4. N Cook

    N Cook Guest

    what sort of date ?
     
  5. Anna Daptor

    Anna Daptor Guest

    Try here http://www.datasheetcatalog.com/datasheets_pdf/2/N/4/2/2N4249.shtml
     
  6. Do Little2

    Do Little2 Guest

    Industry Number : 2N4249
    NTE Device Number: NTE159
    T-PNP,SI-AF PREAMP,DRIVER,TO-92

    For more info, download the free NTE cross reference Version 12,
    located at: http://www.nteinc.com/
     
  7. Guessing late 70s it's in the bright-up circuit of the D85 or D75 scopes.

    TR353 FWIW if you have the circuit diagram (I blew it while probing and hand
    slipped).

    Dave

     
  8. Trouble is AFAIK NTE don't deal over here in UK.

    I'm also not certain of the identification as a plastic 2n4249 :-(

    It could I suppose be the Fairchild version of the PN4249 (plastic 2n4249),
    but not having one to hand I dunno how they are marked.

    Dave
     
  9. N Cook

    N Cook Guest

     
  10. Jim Adney

    Jim Adney Guest

    Fairchild?

    -
     
  11. Franc Zabkar

    Franc Zabkar Guest

    My old "Towers International Transistor Selector" lists the PN4249:

    PNP
    TO92
    L14 pinout (EBC)
    Vcb=60V
    Vce=60V
    Veb=5V
    Ic=100mA
    Tj=150C
    Ptot=600mW in free air
    ftmin=100MHz
    Cob=5pF
    hfe=100min
    hfe_bias=100uA
    use=ALN (audio, low current, low noise)
    manf=NAT (National Semiconductor)
    EUR equiv=BC204
    USA equiv=2N4249

    Towers attributes the PN prefix to Newmarket:

    PN = Newmarket, plastic version of equivalent '2N' number

    The 2N4249 is listed as having been manufactured by "FCU" which is
    Fairchild Semiconductor.


    - Franc Zabkar
     
  12. That seems pretty clear identification! I'm subbing with a 2n2907A

    David
     
  13. Robby

    Robby Guest

    Maybe not, but just searching "2n4249" in Yahoo, (The ONLY search engine
    IMHO) produced about 133 hits, many claiming specs for it. Sometimes the
    simplest search term is the best. You can always tweak it from there.
     
  14. Third hit of 75 when Googling 2n4249 spec

    http://www.americanmicrosemi.com/products/specs/2N4249.phtml

    Transistors » Transistors; Bipolar; Si PNP Low-Power » Bipolar; Si PNP
    Low-Power
    Part Number 2N4249
    Military/High-Rel N
    V(BR)CEO (V) 60
    V(BR)CBO (V) 60
    I(C) Max. (A) 100m
    Absolute Max. Power Diss. (W) 200m
    Maximum Operating Temp (øC) 150õ
    I(CBO) Max. (A) 10nØ
    @V(CBO) (V) (Test Condition)
    V(CE)sat Max. (V)
    @I(C) (A) (Test Condition)
    @I(B) (A) (Test Condition)
    h(FE) Min. Current gain. 100
    h(FE) Max. Current gain.
    @I(C) (A) (Test Condition) 100u
    @V(CE) (V) (Test Condition) 5.0
    f(T) Min. (Hz) Transition Freq 100M
    @I(C) (A) (Test Condition)
    @V(CE) (V) (Test Condition)
    C(obo) (Max) (F) 6.0p
    @V(CB) (V) (Test Condition)
    @Freq. (Hz) (Test Condition)
    Package Style TO-92
    Mounting Style T
    Pinout Equivalence Code 3-12
    Description

    Tom
     
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

-