On Sat, 19 Oct 2013 22:28:33 -0700, Chetan Bhargava wrote:
:: What is a common (abundant and possibly cheap)  5W NPN transistor
:: available? My max load voltage is 14V.

Does hFE matter?

My favourite BJT is the BUJ302A (AU$2.00 each) - I use them for fluro=20
ballasts as they (BUJ302A) tend to die open circuit and are hardier than=20
the TIP41C they replace.

BUJ302A
Vceo 1k05V
Ic 4A max
hFE 66
Pd 80W
TO220

MJE340  (approx AU 90 cents each)
Vceo 300V
Ic 0A5
hFE 30 - 240
Pd 20W
TO225

There is also the BD135-10, BD437, 2N3053  - they are all around the 25p=20
one off mark. The outline is TO126.

Colin



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cdb, colin@btech-online.co.uk on 20/10/2013
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