Hi,
can anyone identify this transistor? Marked H 669A
Its in a To 126 size all plastic package but a fair bit thicker, one I have not seen before. (why?) Its an NPN with lead out BCE. Its directly on the heatsink of a power amp in series with a thermistor, so is either part of the bias circuitry or temperature sense. I don't have a schematic.
Cheers,
Gareth.
have
180 volt 2SD669A with reversed pinning ? NPN and TO126 but ECB-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
Ah, just realised that the legend is actually on the back of the device - it was mounted legend side to the heatsink, and on closer inspection the pins are closest to the legend side, so it looks like you might well be correct.
It is a peculiar package, one I haven't seen before. (This is from a cheap Chinese no name power amplifier, so maybe this is a Chinese part?).
Thanks,
Gareth.
On Mon, 3 Nov 2008 12:45:53 -0000, "Gareth Magennis" put finger to keyboard and composed:
- Franc Zabkar
I think you will find Hitachi are Japanese.
Frank, that is the one.
Thanks,
Gareth.
Frank gets first prize, its a Chinese 2SD669A :)
Gareth.
Let me know when you source a Chinese one that works then, I'll stick with Hitachi thanks. Surprised they even bothered to put numbers on it.
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