BC847BS (was Re: Components with potential)

[jorgen.bergfors at idg.se]

>> As a new item they have the BC847/857. It is a matched dual transistor
from 
>> Philips. It is available as both PNP and NPN and is dirt cheap (SEK 
2:42 / 
>> $0.30 for one). Has anybody tried these? Unfortunately they only seem 
to be 
>> available in surface mount package (SOT363-6). But it should be 
possible to 
>> solder it to a component carrier and put it in an ordinary IC socket.

>This is *very* interesting !
>Especially the pnp pair (which one of the two is it ?).
>This might be the key to build expo converters for 3080's, or even
>SSM2040's
>without matching transistors - hey, if they are SMD, that's at least no
>disadvantage for *this* application ...
>I saw it listed at RS Components, too. DM 2,- (one dollar), but still 
>ok if they are what we think they are.
>There is no description, not even that it is a dual type, just the 
>number and price.
>Do you have more details ?

>JH.
 
You can get the datasheets from the Philips website 
http://www-us.semiconductors.philips.com/search/. 
Just search for BC847BS and BC857BS. Note that the BS at the end is important. 
It turns out that there are single transistor versions of the BC847/857 too. 
847 is the NPN and 857 is the PNP (see the analogy to BC547/557?).
Unfortunately the datasheets don't say much. They say "closely matched current 
gain" but nothing about Ube or any figures. I suppose somebody have to buy a 
bunch and measure. Luckily they are cheap. The price I mentioned is if you buy 
one. If you buy 25 or more, they are even cheaper.

/Jorgen