Obsolete trannies

5th element · 10th February 2003, 02:21 PM

Due to some problems obtaining certain transistors and then realising that they were now obsolete made me think that maybe some of the other trannies im ordering have been replaced.

Have the 2SD669 and 2SD649 been replaced by a more recent component??

Cheers Matt

Christer · 10th February 2003, 02:47 PM

Quote:

Originally posted by 5th element
Have the 2SD669 and 2SD649 been replaced by a more recent component??

I got the impression they were obsolete when chasing for
them a while back, one reason being that they were discontinued
at some suppliers. However, Hitachi listed the status for these
devices as "mass production" in December and I found another
supplier to buy them from. Actually, when I check the devices
I bought I find that only one of these types are Hitachi, so
there seems to be several companies still manufacturing them.

BTW, the Hitachi datasheets have a very recent date (year
2000, I think) and no note about this being a revision, so
perhaps someone else used to manufacture these transistors
but quit production and Hitachi took over?

Netlist · 10th February 2003, 04:02 PM

Matt

The 2SD649 is a made by Matsushita and Thoshiba
The 2SD669 by Hitachi.

They could be replaced by:
2SD649: BU2508A, 2SC3025..26, 2SC3685, 2SD821
2SD669: 2SC3117

Depending on the application of course

/Hugo

Christer · 10th February 2003, 04:33 PM

Quote:

Originally posted by Netlist
Matt

The 2SD649 is a made by Matsushita and Thoshiba
The 2SD669 by Hitachi.

They could be replaced by:
2SD649: BU2508A, 2SC3025..26, 2SC3685, 2SD821
2SD669: 2SC3117

Hitachi manufactures both types. I don't think Toshiba does,
however. I don't think Toshiba manufactures either of them,
though, although they might have done so earlier.

The 649s I got seems to be manufactured by CDIL. I have
never heard of that company before, though.

jackinnj · 10th February 2003, 07:55 PM

send me an email, I ship via Global Priority Mail.

Netlist · 10th February 2003, 08:17 PM

Hi Christer

It's a strange world
I found the manufacturers in my data books, but were talking
'86-'87 here so I might be out of date. Although I have some recent data who
lists Toshiba for the 649’s.
I found the 649's also at: http://www.semicon.panasonic.co.jp/md/e-29269D.html

Found that CDIL. Our Indian friends are producing a lot of semicons these days:
http://www.cdil.com/

Digging is fun when we get some reply. So lets wait...

Christer · 10th February 2003, 08:58 PM

Quote:

Originally posted by Netlist
It's a strange world
I found the manufacturers in my data books, but were talking
'86-'87 here so I might be out of date. Although I have some recent data who
lists Toshiba for the 649’s.
I found the 649's also at: http://www.semicon.panasonic.co.jp/md/e-29269D.html

Now the confusion level is rising steadily.

I assumed Matt was asking about 2SB649 and 2SD669 which
are complementary and often used together. Neither or these
appear in the Panasonic list, but on the other hand both 2SB669
and 2SD649 do. I knew these parts existed too, but I
know nothing about them, and I don't think they are
complementary. However, I now see that Matt actually asked
about 2SD649 and 2SD669, so the confusion is total. Is that
what he meant to ask, or did he mean 2SB649 and 2SD669, or
....?

Matt, I think you'd better tell us if you meant what you wrote,
or otherwise which transistors you asked about.

Quote:

Found that CDIL. Our Indian friends are producing a lot of semicons these days:
http://www.cdil.com/

Digging is fun when we get some reply. So lets wait...

Thanks. I was to lazy to check it up myself right now. Actually,
I ordered a bunch of 2SB649 and 2SD669 in December, but I
haven't had time to use them yet. Hence, I hadn't really paid
attention to the brand before. Now when Matt asked, I thought
I should check that the ones I got actually were Hitachi, but
found that the 2SB649's were actually CDIL. Strangely, CDIL
does not appear to manufacture these devices according to
the online product list, but this list seems to be old, so I suppose
they have taken up production recently. To be more precice,
the transistors I have are labelled as P3B649A, which doesn't
look like a CDIL part number at all, but they do have CDIL
printed on them. I am almost getting a little bit worried now,
but why would anyone make pirate copies of such cheap
devices?

jackinnj · 10th February 2003, 09:57 PM

voila:

Christer · 10th February 2003, 10:07 PM

Thanks jackinnij. Though I didn't suspect those of my transistors
that are labelled hitachi, I doesn't hurt to compare, and they
look close enough to yours. The ones that are branded CDIL
are slightly more worrying, but at least CDIL itself seems to
be an OK company. It seems they've been around since 1964.

blmn · 10th February 2003, 10:26 PM

I used sometime ago TIP33/34CF from CDIL and they worked fine. Sometimes I made short circuit tests to verify the thermal sensors and the SOA protection of the circuit and these transistors passed very well on the test.

It was just one time, but, based on it, I think you don't have to be affraid of using CDIL devices.

Regards

10th February 2003, 02:21 PM	#1
5th element diyAudio Member Join Date: Oct 2002 Location: England	Obsolete trannies Due to some problems obtaining certain transistors and then realising that they were now obsolete made me think that maybe some of the other trannies im ordering have been replaced. Have the 2SD669 and 2SD649 been replaced by a more recent component?? Cheers Matt

10th February 2003, 07:55 PM	#5
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	I have plenty of 669 and 649 send me an email, I ship via Global Priority Mail.

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10th February 2003, 04:02 PM	#3
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	Matt The 2SD649 is a made by Matsushita and Thoshiba The 2SD669 by Hitachi. They could be replaced by: 2SD649: BU2508A, 2SC3025..26, 2SC3685, 2SD821 2SD669: 2SC3117 Depending on the application of course /Hugo

10th February 2003, 08:17 PM	#6
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	Hi Christer It's a strange world I found the manufacturers in my data books, but were talking '86-'87 here so I might be out of date. Although I have some recent data who lists Toshiba for the 649’s. I found the 649's also at: http://www.semicon.panasonic.co.jp/md/e-29269D.html Found that CDIL. Our Indian friends are producing a lot of semicons these days: http://www.cdil.com/ Digging is fun when we get some reply. So lets wait...

10th February 2003, 10:07 PM	#9
Christer diyAudio Member Join Date: Sep 2002 Location: Sweden	Thanks jackinnij. Though I didn't suspect those of my transistors that are labelled hitachi, I doesn't hurt to compare, and they look close enough to yours. The ones that are branded CDIL are slightly more worrying, but at least CDIL itself seems to be an OK company. It seems they've been around since 1964.

10th February 2003, 10:26 PM	#10
blmn diyAudio Member Join Date: Feb 2001 Location: .	I used sometime ago TIP33/34CF from CDIL and they worked fine. Sometimes I made short circuit tests to verify the thermal sensors and the SOA protection of the circuit and these transistors passed very well on the test. It was just one time, but, based on it, I think you don't have to be affraid of using CDIL devices. Regards