News01 wrote:
Try here.....Paul
http://www.ciconelectronics.com/2sd829.html

[attribution unclear] wrote:
I actually ordered them from this site 3 weeks ago.
i never received anything,
no one answers the phone or responds to emails.
i have started a paypal dispute as I have already paid.
Beware of this site.

Gary L. Woodruff wrote:
I thought everyone should be aware that this site is a scam.

News01 wrote:
Try here.....Paul

http://www.ciconelectronics.com/2sd829.html



----- Original Message ----- From: "Gary L. Woodruff" <woodruffrepair at (no spam) frontiernet.net
Newsgroups: sci.electronics.components
Sent: Tuesday, May 20, 2008 7:40 AM
Subject: Need help locating Transistor or equiv


howdy all,

I am trying to replace a transistor 2SD829. Here is a link to a data sheet. http://www.datasheets.org.uk/pdf/3937549.pdf

I need the replacements asap so common replacement would be great.

any help would be greatly appreciated.

thanks, Gary

I actually ordered them from this site 3 weeks ago. i never received anything, no one answers the phone or responds to emails. i have started a paypal dispute as I have already paid. Beware of this site.

howdy all,

I am trying to replace a transistor 2SD829. Here is a link to a data
sheet. http://www.datasheets.org.uk/pdf/3937549.pdf

I need the replacements asap so common replacement would be great.

any help would be greatly appreciated.

howdy all,

I am trying to replace a transistor 2SD829. Here is a link to a data
sheet. http://www.datasheets.org.uk/pdf/3937549.pdf

I need the replacements asap so common replacement would be great.

any help would be greatly appreciated.

As this is a somewhat unusual package, I suspect you're going to find
it difficult to find a direct drop-in replacement.

Depending on the circuit application, you might be able to substitute
a more modern sort of part. It looks as if the 2SD829 is a power
Darlington, intended for use as a saturated switch. It might be
possible to adapt the circuit to use something like an IGBT, and use a
different package which can be mounted on the existing heat-sink.

Take a look at the International Rectifier IGBTs (they're page 992 and
993 in the last-year's Digi-Key catalog I have here).

There appear to be some tradeoffs in the selection. The 250-volt
parts in TO-247 packages have Vcd(sat) values similar to those of the
2SD829, and much higher pulse- and continuous-current and
power-dissipation ratings, but don't have an internal reverse diode.

The parts that do have an internal reverse diode, and current and
power ratings which match or exceed those of the 2SD829, all seem to
have a slightly higher Vce(sat)... but as these are at a higher
current level, this may not be an issue.

As one possible example: the IRG4PC40 is a 600-volt part, in a
TO-247AC package, with Vce(sat) maximum of 1.85 volts, 49-amp
continuous current rating at 25 degrees C, pulse current IC(max) of
200 amps, 160-watt maximum power dissipation, and it has an internal
reverse diode. You *might* need an external gate-pulldown resistor,
or might not, depending in the circuit driving it (and might need a
series resistor of a few ohms on the gate to avoid snivets, if the
existing bipolar-drive base resistor won't serve). $5.74 in onesies
in last year's catalog (the newer ROHS equivalent part IRG4PC40PBF
is a couple of bucks more).

Thanks for the info. I only have a small pcb with a few diodes and
resistors, a couple of relays, and the transistor. It is a forklift
circuit so I believe it is 24 volt. I have plenty of space on the board
to mount any type package. I would rather have a closer match for the
circuit but in a different package, if possible. I really appreciate
your help.

In article <kOGYj.8$yV1.2 at (no spam) fe127.usenetserver.com>,
Gary L. Woodruff <woodruffrepair at (no spam) frontiernet.net> wrote:

Thanks for the info. I only have a small pcb with a few diodes and
resistors, a couple of relays, and the transistor. It is a forklift
circuit so I believe it is 24 volt. I have plenty of space on the board
to mount any type package. I would rather have a closer match for the
circuit but in a different package, if possible. I really appreciate
your help.

Hmmm. Well, high-power Darlingtons seem to have fallen out of favor
with industry - I imagine that power MOSFETs and IGBTs have proven
superior - both are easier to drive, and MOSFETs are faster to switch.

I did a search at Digi-Key for NPN Darlingtons, 20 amps or above, in
most of the common power packages. The only one they list in a TO-247
plastic package is the ST Microelectronics SGSD100, which is a
non-stock item with a big minimum order.

They do have two stock parts by ON Semiconductor - the MJ11016G and
MJ11032G (120-volt parts, 30 and 50 amperes respectively). These are
both in the classic TO-3 metal package. You'd need to add your own
collector/emitter flyback diode.

I just don't think you're going to have much luck finding a high-power
Darlington with a built-in diode these days, unless you find somebody
who actually happens to have a few New Old Stock parts.

howdy all,

I am trying to replace a transistor 2SD829. Here is a link to a data
sheet. http://www.datasheets.org.uk/pdf/3937549.pdf

I need the replacements asap so common replacement would be great.

any help would be greatly appreciated.

thanks, Gary

howdy all,

I am trying to replace a transistor 2SD829. Here is a link to a data
sheet. http://www.datasheets.org.uk/pdf/3937549.pdf

I need the replacements asap so common replacement would be great.

any help would be greatly appreciated.

Hmmm. Well, high-power Darlingtons seem to have fallen out of favor
with industry -

On Tue, 20 May 2008 10:40:22 -0400, "Gary L. Woodruff"
woodruffrepair at (no spam) frontiernet.net> wrote:

howdy all,

I am trying to replace a transistor 2SD829. Here is a link to a data
sheet. http://www.datasheets.org.uk/pdf/3937549.pdf

I need the replacements asap so common replacement would be great.

any help would be greatly appreciated.


You could probably retrofit a TO218 or TO247 body size into place.

http://www.nteinc.com/specs/200to299/pdf/nte256.pdf

Pinout is the same - youd have to come up with a pressure bar and
longer mounting screws.

RL
Howdy, thanks for the reply. I believe this looks like the most direct

Dave, Thanks for the help. I will try the mj11032g for the higher
current. When I look at the data sheet I do see a diode E to C in the
schem. I have limited experience replacing with something that is not an
exact equiv. I assume a Schottky diode, but what rating, etc? Any
knowledge you could impart would be greatly appreciated.

legg wrote:
On Tue, 20 May 2008 10:40:22 -0400, "Gary L. Woodruff"
woodruffrepair at (no spam) frontiernet.net> wrote:

howdy all,

I am trying to replace a transistor 2SD829. Here is a link to a data
sheet. http://www.datasheets.org.uk/pdf/3937549.pdf

I need the replacements asap so common replacement would be great.

any help would be greatly appreciated.


You could probably retrofit a TO218 or TO247 body size into place.

http://www.nteinc.com/specs/200to299/pdf/nte256.pdf

Pinout is the same - youd have to come up with a pressure bar and
longer mounting screws.

RL
Howdy, thanks for the reply. I believe this looks like the most direct
replacement for the 2SD829. Correct me if i am wrong but it does not
need any other modifications except to mount and dissipate heat?

legg wrote:
On Tue, 20 May 2008 10:40:22 -0400, "Gary L. Woodruff"
woodruffrepair at (no spam) frontiernet.net> wrote:

howdy all,

I am trying to replace a transistor 2SD829. Here is a link to a data
sheet. http://www.datasheets.org.uk/pdf/3937549.pdf

I need the replacements asap so common replacement would be great.

any help would be greatly appreciated.


You could probably retrofit a TO218 or TO247 body size into place.

http://www.nteinc.com/specs/200to299/pdf/nte256.pdf

Pinout is the same - youd have to come up with a pressure bar and
longer mounting screws.

RL
Howdy, thanks for the reply. I believe this looks like the most direct
replacement for the 2SD829. Correct me if i am wrong but it does not
need any other modifications except to mount and dissipate heat?

On Wed, 21 May 2008 13:27:46 -0400, "Gary L. Woodruff"
woodruffrepair at (no spam) frontiernet.net> wrote:

legg wrote:
On Tue, 20 May 2008 10:40:22 -0400, "Gary L. Woodruff"
woodruffrepair at (no spam) frontiernet.net> wrote:

howdy all,

I am trying to replace a transistor 2SD829. Here is a link to a data
sheet. http://www.datasheets.org.uk/pdf/3937549.pdf

I need the replacements asap so common replacement would be great.

any help would be greatly appreciated.

You could probably retrofit a TO218 or TO247 body size into place.

http://www.nteinc.com/specs/200to299/pdf/nte256.pdf

Pinout is the same - youd have to come up with a pressure bar and
longer mounting screws.

RL
Howdy, thanks for the reply. I believe this looks like the most direct
replacement for the 2SD829. Correct me if i am wrong but it does not
need any other modifications except to mount and dissipate heat?


Taking a look at my own usual supplier, the closest thing
electrically, and in stock from Digikey, is the MJH11017.


http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=MJH11022GOS-ND

http://www.onsemi.com/pub_link/Collateral/MJH11017-D.PDF

RL
I missed the missing diode in the nte256! I have received a few