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Equivalent for 2N3904

D

Dave

Jan 1, 1970
0
Could anybody with a copy of towers etc. give me an equivalent for a 2N3904

TIA
Dave
 
A

Anthony Fremont

Jan 1, 1970
0
Dave said:
Could anybody with a copy of towers etc. give me an equivalent for a
2N3904

BC547 or 2N2222 should work for general purpose work.
 
D

Dave Platt

Jan 1, 1970
0
Dave said:
Could anybody with a copy of towers etc. give me an equivalent for a 2N3904

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.
 
D

Dave

Jan 1, 1970
0
Cheers guys,

Have some 2N2222's kicking around - somewhere!
 
W

Watson A.Name - \Watt Sun, the Dark Remover\

Jan 1, 1970
0
Anthony Fremont said:
2N3904

BC547 or 2N2222 should work for general purpose work.

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.
 
B

Barry & Nikki

Jan 1, 1970
0
If you do an Ebay search there are currently quite a few 2N3904 transistors
available for an exact replacement.
 
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