Need help locating Transistor or equiv

[Gary L. Woodruff]

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

 

[Gary L. Woodruff]

News01 wrote:
Try here.....Paul

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



----- Original Message ----- From: "Gary L. Woodruff" <woodruffrepair@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.

I thought everyone should be aware that this site is a scam.

 

[JeffM]

(was: Need help locating Transistor or equiv)

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.

A Web search shows others have been scammed by these crooks.
http://www.google.com/search?q=cache:csLYyi272VIJ:www.merchantcircle.com/business/Cicon.Electronics.2.212-396-2806+Reserved+Policy+Terms+SCAMMED+SCAM+*-*-not-received-*-*

Another curious bit of evidence:
http://www.google.com/search?q=ciconelectronics.com+Expired-and-Deleted-Domain-Names

 

[Gary L. Woodruff]

Dave Platt 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.

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.

thanks, Gary

 

[Gary L. Woodruff]

Dave Platt wrote:

In article <kOGYj.8$yV1.2@fe127.usenetserver.com>,
Gary L. Woodruff <woodruffrepair@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.

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.

thanks again,

Gary

 

[legg]

On Tue, 20 May 2008 10:40:22 -0400, "Gary L. Woodruff"
<woodruffrepair@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.

thanks, Gary

Availability is the issue for a 'common' replacement.

A linear part in the same package is NTE92. Although also referred to
as a high speed switch, it has no internal base turn-off diode.

http://www.nteinc.com/specs/10to99/pdf/nte92.pdf

If a TO3 package is practical you might try an NTE97/98/99

http://www.nteinc.com/specs/10to99/pdf/nte97.pdf

RL

 

[legg]

On Tue, 20 May 2008 10:40:22 -0400, "Gary L. Woodruff"
<woodruffrepair@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

 

[Kevin G. Rhoads]

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

There is nothing magic about a Darlington in one case. A common
power bipolar with one or more medium and small signal bipolars
and *voila* a power Darlington.

 

[Gary L. Woodruff]

legg wrote:

On Tue, 20 May 2008 10:40:22 -0400, "Gary L. Woodruff"
woodruffrepair@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?

thanks, Gary

 

[legg]

On Wed, 21 May 2008 13:27:46 -0400, "Gary L. Woodruff"
<woodruffrepair@frontiernet.net> wrote:

legg wrote:
On Tue, 20 May 2008 10:40:22 -0400, "Gary L. Woodruff"
woodruffrepair@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?

As a high voltage part, it's saturation voltage when conducting will
be higher, and it's gain is also considerably lower, which may stress
the drive circuit. A lower voltage darlington should work better.

The NTE270 actually doesn't have better saturation and is also missing
the damper diode, but the gain is improved

http://www.nteinc.com/specs/200to299/pdf/nte270.pdf

What is being switched? If it's not driving a magnetic part in a
bridge, the damper may not actually be needed.

Have you checked with the fork lift distributor for replacement parts?

RL

 

[legg]

On Wed, 21 May 2008 13:27:46 -0400, "Gary L. Woodruff"
<woodruffrepair@frontiernet.net> wrote:

legg wrote:
On Tue, 20 May 2008 10:40:22 -0400, "Gary L. Woodruff"
woodruffrepair@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

 

[Gary L. Woodruff]

legg wrote:

On Wed, 21 May 2008 13:27:46 -0400, "Gary L. Woodruff"
woodruffrepair@frontiernet.net> wrote:

legg wrote:
On Tue, 20 May 2008 10:40:22 -0400, "Gary L. Woodruff"
woodruffrepair@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

recommendations and am starting to become confused. If I use the
MJH11017 will I need to add an additional diode to the circuit? If I do,
could someone detail where in the circuit I would add it?

Thanks, Gary

 

[Gary L. Woodruff]

Dave Platt wrote:

In article <4UfZj.1069$J04.731@fe087.usenetserver.com>,
Gary L. Woodruff <woodruffrepair@frontiernet.net> wrote:

I missed the missing diode in the nte256! I have received a few
recommendations and am starting to become confused.

I diagnose "toxic option shock". A cool washcloth on the forehead, a
chilled beer, and 24 hours of not thinking about the problem usually
helps.

There's almost certainly no one "right" or "best" solution for what
you're trying to accomplish... there are many substitutions that you
can make, which will work acceptably.

If I use the
MJH11017 will I need to add an additional diode to the circuit? If I do,
could someone detail where in the circuit I would add it?

If you use a Darlington or IGBT which does not include a reverse
diode, you should add one - otherwise, the transistor may experience a
high-voltage spike when it's switched off (due to the energy stored in
the motor's windings) and this could exceed the Vce(max) and pop the
device.

The diode would be added in parallel with the collector/emitter pins
of the Darlington or IGBT - cathode to collector, anode to emitter.
Just take a look at the internal schematic for the original Darlington
switch, and make your new arrangement look like that electrically.


Dave, I guess this is where my confusion starts. I see diode E -C

in the http://www.onsemi.com/pub_link/Collateral/MJH11017-D.PDF circuit
diagram. Am I correct that I would NOT need to add a diode to this?

Thanks again, your help is greatly appreciated.

Gary

 

[Gary L. Woodruff]

Dave Platt wrote:

In article <4BjZj.5269$mz3.4560@fe101.usenetserver.com>,
Gary L. Woodruff <woodruffrepair@frontiernet.net> wrote:

Dave, I guess this is where my confusion starts. I see diode E -C
in the http://www.onsemi.com/pub_link/Collateral/MJH11017-D.PDF circuit
diagram. Am I correct that I would NOT need to add a diode to this?

I believe you are correct. This family of Darlingtons does include a
reverse diode, and would not need an external one.

HOWEVER: the MJH11017 is a PNP Darlington! If I recall correctly,
the one you're seeking to replace is an NPN Darlington. Not compatible!

You'd want to use an MJH11018, which is the NPN equivalent of the
MJH11017, to replace an existing NPN part.

Dave, Thanks, I did catch that I needed the 11018 for NPN from the data

sheet. The forklift is older and blows this transistor frequently. The
factory repair for this is $$$$. If I can replace it with this and it is
more robust I can save the company $$$! If this one fails in a short
period of time I will try one with a higher current rating and see if
that works. Once again thanks to you and everyone else for the advise.

Gary

 

[legg]

On Thu, 22 May 2008 11:00:16 -0400, "Gary L. Woodruff"
<woodruffrepair@frontiernet.net> wrote:

legg wrote:

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
recommendations and am starting to become confused. If I use the
MJH11017 will I need to add an additional diode to the circuit? If I do,
could someone detail where in the circuit I would add it?

The MJH11017-d is an electrical equivalent. No extra parts needed.

RL

 

[legg]

On Thu, 22 May 2008 13:41:16 -0700, dplatt@radagast.org (Dave Platt)
wrote:

In article <4BjZj.5269$mz3.4560@fe101.usenetserver.com>,
Gary L. Woodruff <woodruffrepair@frontiernet.net> wrote:

Dave, I guess this is where my confusion starts. I see diode E -C
in the http://www.onsemi.com/pub_link/Collateral/MJH11017-D.PDF circuit
diagram. Am I correct that I would NOT need to add a diode to this?

I believe you are correct. This family of Darlingtons does include a
reverse diode, and would not need an external one.

HOWEVER: the MJH11017 is a PNP Darlington! If I recall correctly,
the one you're seeking to replace is an NPN Darlington. Not compatible!

You're right. Boot to the head.

You'd want to use an MJH11018, which is the NPN equivalent of the
MJH11017, to replace an existing NPN part.

MJH11022 is the closest in-stock item on the Digikey site. It shows up
on the same data sheet as the 017. Possibly where the mix-up started.

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

Sorry about that.

RL

 

[legg]

ignore previous post.

MJH11022 is the in-stock item of correct polarity.
Same data sheet.

RL