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Transistor alternative

Discussion in 'General Electronics Discussion' started by bluelight, Sep 16, 2014.

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  1. bluelight


    Aug 21, 2014
    I am working on a project ( Schematic.pdf) that uses Transistor General Purpose BJT NPN 40 Volt 0.2 Amp 3-Pin TO-92 transistors and I think I might have blown them with my 40w soldering iron, so I am going to stop at Fry's Electronics today to get new transistors. The transistors recommend are NTE 123AP TRANSISTOR NPN-SILICON 75V 0.6 AMP TO-92 CASE AUDIO AMP/SWITCH transistors. Can I use these transistors or do I need to order the exact same ones from Jameco?

    Fairchild transistor:
    NTE transistor:
  2. Colin Mitchell

    Colin Mitchell

    Aug 31, 2014
    Any transistor can be used BC547 BC338 2N2222A . . . . any junk NPN transistor
    (*steve*) likes this.
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    There are many transistors you could use:

    etc., etc.

    All you want is an NPN BJT capable of 50mA or more of collector current and able to operate at 20V or more. There are so many th choose from.

    Just make sure you know the correct pinout!
  4. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    Nov 28, 2011
    TO-92 aka TO-226 transistor common pinouts 720x460.png
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