Identify transistor H669A

  • Thread starter Gareth Magennis
  • Start date
G

Gareth Magennis

Guest
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.
 
Gareth Magennis <sound.service@btconnect.com> wrote in message
news:YdCdne7LhfYXb5PUnZ2dnUVZ8sGdnZ2d@bt.com...
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.
Click to expand...

180 volt 2SD669A with reversed pinning ?
NPN and TO126 but ECB


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
 
"N_Cook" <diverse@tcp.co.uk> wrote in message
news:gen32u$36v$1@registered.motzarella.org...
Gareth Magennis <sound.service@btconnect.com> wrote in message
news:YdCdne7LhfYXb5PUnZ2dnUVZ8sGdnZ2d@bt.com...
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.




180 volt 2SD669A with reversed pinning ?
NPN and TO126 but ECB
Click to expand...

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.
 
Gareth Magennis wrote:
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.


2SD669A?
Click to expand...
 
Gareth Magennis wrote:
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.


http://www.datasheetcatalog.com/datasheets_pdf/2/S/D/6/2SD669A.shtml
Click to expand...
 
On Mon, 3 Nov 2008 12:45:53 -0000, "Gareth Magennis"
<sound.service@btconnect.com> put finger to keyboard and composed:

can anyone identify this transistor?
Marked H
669A
Click to expand...
http://www.dayan.com.cn/Datasheet/Huashan/products/products%20catalog/chinese/to126/H669A.pdf

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
Gareth Magennis wrote:
"N_Cook" <diverse@tcp.co.uk> wrote in message
news:gen32u$36v$1@registered.motzarella.org...
Gareth Magennis <sound.service@btconnect.com> wrote in message
news:YdCdne7LhfYXb5PUnZ2dnUVZ8sGdnZ2d@bt.com...
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.



180 volt 2SD669A with reversed pinning ?
NPN and TO126 but ECB



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.




I think you will find Hitachi are Japanese.
Click to expand...
 
"Franc Zabkar" <fzabkar@iinternode.on.net> wrote in message
news:qehug49p2932b9nk947j5minecumassjdn@4ax.com...
On Mon, 3 Nov 2008 12:45:53 -0000, "Gareth Magennis"
sound.service@btconnect.com> put finger to keyboard and composed:

can anyone identify this transistor?
Marked H
669A

http://www.dayan.com.cn/Datasheet/Huashan/products/products%20catalog/chinese/to126/H669A.pdf

- Franc Zabkar
--
Click to expand...




Frank, that is the one.



Thanks,



Gareth.
 
"Archon" <Chipbee40_SpamNo@yahoo.com> wrote in message
news:kTIPk.20083$Fs5.14222@fe10.news.easynews.com...
Gareth Magennis wrote:
"N_Cook" <diverse@tcp.co.uk> wrote in message
news:gen32u$36v$1@registered.motzarella.org...
Gareth Magennis <sound.service@btconnect.com> wrote in message
news:YdCdne7LhfYXb5PUnZ2dnUVZ8sGdnZ2d@bt.com...
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.



180 volt 2SD669A with reversed pinning ?
NPN and TO126 but ECB



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.




I think you will find Hitachi are Japanese.
Click to expand...



Frank gets first prize, its a Chinese 2SD669A :)





Gareth.
 
Gareth Magennis wrote:
"Archon" <Chipbee40_SpamNo@yahoo.com> wrote in message
news:kTIPk.20083$Fs5.14222@fe10.news.easynews.com...
Gareth Magennis wrote:
"N_Cook" <diverse@tcp.co.uk> wrote in message
news:gen32u$36v$1@registered.motzarella.org...
Gareth Magennis <sound.service@btconnect.com> wrote in message
news:YdCdne7LhfYXb5PUnZ2dnUVZ8sGdnZ2d@bt.com...
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.


180 volt 2SD669A with reversed pinning ?
NPN and TO126 but ECB


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.




I think you will find Hitachi are Japanese.




Frank gets first prize, its a Chinese 2SD669A :)





Gareth.


Let me know when you source a Chinese one that works then, I'll stick
Click to expand...
with Hitachi thanks. Surprised they even bothered to put numbers on it.
 
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