This is a part that became popular because when saturated (switched on
completely) the transistor has a very LOW saturation voltage. This means
that it can sink more current without getting as warm as other components.
See if you can find a PN2222, its a TO92 version of the 2N2222, which is a
TO18. But unless you are sinking 150ma+, anything will work, i.e. PN4401,
many others.

--Bob

At 11:41 AM 9/3/2003 -0700, you wrote:
>What commonly available transistor can I use in place of a 2n222?
>
>Thanks
>
>John
>
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--------------
Bob Axtell
PIC Hardware & Firmware Dev
Tucson, AZ
1-512-219-2363
"I lose some on each sale but make it up in volume."

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