What transistors are these?

[Herr Masel]

I opened up an old tv that my parent's recieved as a wedding gift about twenty years ago. It has been unused for the past few years so I opened it up to see if there is anything I could use inside. It's all covered in dust, but I managed to see that there are a few c1046 and c2258 transistors in there. They are black with a hole in the middle, maybe mosfets? Anyway, they are probably silicon (from my limited experience I've noticed germanium components use three numbers usually), but I searched and couldn't find, so does anyone know what these might be and if are of any use to me?

[chrishopkins]

Googling comes up with:

http://www.nsbc.com/idx4ae.htm (c2258)

http://www.alldatasheet.com/view.jsp?Searchword=C10 (C1046)

[Herr Masel]

Thanks, I did google but didn't come up with those (or didn't know how to look good enough). It's still a little vague to me but I don't think they'd be usable for any stompboxes... oh well, a friend told me about an old radio I can have.

[Zero the hero]

C2258 meand 2sc2258. That's the japanese way of marking transistors, and usually the "2s" is omitted from the component name.
Here you go for this one:
http://pdf.alldatasheet.com/datasheet-pdf/view/83185/PANASONIC/2SC2258.html
2sa and 2sb are PNP transistors, 2sc and 2sd are NPN; 2sj are p-FET and 2sk are n-fet.

From http://www.101science.com/transistor.htm

Code Select Expand

The digit is one less than the number of connections, i.e. 2 for most.  The letters indicate the application area according to the following code:

SA: PNP HF transistor
SB: PNP AF transistor
SC: NPN HF transistor
SD: NPN AF transistor
SE: Diodes
SF: Thyristors
SG: Gunn devices
SH: UJT
SJ: P-channel FET/MOSFET
SK: N-channel FET/MOSFET
SM: Triac
SQ: LED
SR: Rectifier
SS: Signal diodes
ST: Avalanche diodes
SV: Varicaps
SZ: Zener diodes

The serial number runs from 10-9999.
Examples- 2SA2222, 2SB719, 2SC583, 2SC435, C 435.


[Nikolay]

Sometimes Cxxxx means BCxxxx....