Can anyone identify this part from the dimmer control module?
Thread Starter
Burning Brakes
Joined: Dec 2002
Posts: 1,199
Likes: 4
From: Cairns Australia
Can anyone identify this part from the dimmer control module?
My dimmer control module failed recently and I have a tech friend trying to fix it.
All the parts test OK except for the large T0220case, clipped to the heatsink. This part is no longer available and we're trying to identify a replacement.
Here's a pic -
korvette4u has said it's a bipolar transistor, I've passed that on to my friend as unfortunately it means very little to me, but if anyone else knows what this part does - ie -Transistor (NPN or PNP type),SCR, FET etc please let me know.
I've posted close up pics of the module and a list of known parts in case it helps anyone else -
http://www.users.bigpond.com/mpheale...mer/Dimmer.htm
My recent post on this with some ideas and a circuit diagram are at - http://forums.corvetteforum.com/show...56&forum_id=48
The circuit diagram by Brookman is at http://brookins.us/dimmer.jpg
If anyone else knows for sure what this part is, please let me know.
S'nut
All the parts test OK except for the large T0220case, clipped to the heatsink. This part is no longer available and we're trying to identify a replacement.
Here's a pic -
korvette4u has said it's a bipolar transistor, I've passed that on to my friend as unfortunately it means very little to me, but if anyone else knows what this part does - ie -Transistor (NPN or PNP type),SCR, FET etc please let me know.
I've posted close up pics of the module and a list of known parts in case it helps anyone else -
http://www.users.bigpond.com/mpheale...mer/Dimmer.htm
My recent post on this with some ideas and a circuit diagram are at - http://forums.corvetteforum.com/show...56&forum_id=48
The circuit diagram by Brookman is at http://brookins.us/dimmer.jpg
If anyone else knows for sure what this part is, please let me know.
S'nut
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
take that puppy to a radio shack... I hope they are better then they are here!!! or, a real electronics supplier.
That is some kinda transistor, and those little numbers will help the gurus xref it to something available.
That is some kinda transistor, and those little numbers will help the gurus xref it to something available.
Melting Slicks
Joined: Dec 2004
Posts: 2,137
Likes: 5
From: Howard PA
I think I posted something about this before. Try one of these listed below, the worst it's going to do is not work. NTE 377 it's a standard NPN switch at a fairly heavy current rating. It's a cross for 2SD613.
http://www.nteinc.com/specs/300to399/pdf/nte377.pdf
http://www.nteinc.com/specs/300to399/pdf/nte377.pdf
Le Mans Master
Joined: Dec 1999
Posts: 8,540
Likes: 1
From: And on the fifth day, subpoenas were served to Obama senior staff
It crosses to an NTE 123AP NPN Transistor:
http://www.nteinc.com/specs/100to199/NTE123AP.html
Radio Shack should have a resonable replacement.
Watch for changes in location of pins.
Lets us know how it works out.
http://www.nteinc.com/specs/100to199/NTE123AP.html
Radio Shack should have a resonable replacement.
Watch for changes in location of pins.
Lets us know how it works out.
Melting Slicks
Joined: Dec 2004
Posts: 2,137
Likes: 5
From: Howard PA
Originally Posted by PeteL
It crosses to an NTE 123AP NPN Transistor:
http://www.nteinc.com/specs/100to199/NTE123AP.html
Radio Shack should have a resonable replacement.
Watch for changes in location of pins.
Lets us know how it works out.
http://www.nteinc.com/specs/100to199/NTE123AP.html
Radio Shack should have a resonable replacement.
Watch for changes in location of pins.
Lets us know how it works out.
That 123AP isn't even the same case style not mention it's only good for 600 milliamps. Yea put that in if you can even make it fit and watch it release all the smoke.
I'm telling you, an original Japanese 2SD613 or the NTE 377 sub is a perfect device for this application.
I agree to watch out for the pin out, but most high current gain NPN TO220 case style transistors all use BCE
It should be a drop in thing.
Le Mans Master
Joined: Dec 1999
Posts: 8,540
Likes: 1
From: And on the fifth day, subpoenas were served to Obama senior staff
Just went to the NTE sight and thats what it listed.
Edit:
Think you are right, does not seem to be the right application.
I hate in-house numbers.
Edit:
Think you are right, does not seem to be the right application.
I hate in-house numbers.
Last edited by PeteL; May 12, 2005 at 06:17 PM.
Thread Starter
Burning Brakes
Joined: Dec 2002
Posts: 1,199
Likes: 4
From: Cairns Australia
take that puppy to a radio shack... I hope they are better then they are here!!! or, a real electronics supplier.
My tech friend has waded through many old parts lists looking for a clue as to what it is and does.
Thanks Petel and AllT4, I'll pass your info on to my tech. This part is clipped to a massive heat sink, you can assume it takes the main load which is 12volts running 6 courtesy lights and a hatch release solenoid -
I'd imagine we're looking at amps not milliamps.
S'nut
Le Mans Master
Joined: Dec 1999
Posts: 8,540
Likes: 1
From: And on the fifth day, subpoenas were served to Obama senior staff
Have your friend do a cross link to ECG 152, it may be close. My old ECG catalog is buried in boxes in my garage.
Here is a cross to ECG 152, with that heat sink it may be OK.
http://www.datasheetarchive.com/data...29/297834.html
Let us know what you learn.
Here is a cross to ECG 152, with that heat sink it may be OK.
http://www.datasheetarchive.com/data...29/297834.html
Let us know what you learn.
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Drifting
Joined: Jul 2004
Posts: 1,358
Likes: 291
From: MA
If the semicondutor is used in a dimmer module I'd guess it is a Triac or SCR. I did try and cross this part but it is a proprietory number (another words GE manufactured it but that's all we know).
I looked at the schematic diagram and someone shows Q4 as an NPN transistor. That does not look correct! But before I can say that for sure I would need to know where pins A,B,C,D,E go. I can't make it out on the picture of the service manual.
This is going to be a part that is kind of trial and error (I may be able pick a close replacement with the correct schematic and pin (ABCDE) layout.
I give you guys credit for a drawing of the diagram and detailed info
I looked at the schematic diagram and someone shows Q4 as an NPN transistor. That does not look correct! But before I can say that for sure I would need to know where pins A,B,C,D,E go. I can't make it out on the picture of the service manual.
This is going to be a part that is kind of trial and error (I may be able pick a close replacement with the correct schematic and pin (ABCDE) layout.
I give you guys credit for a drawing of the diagram and detailed info
Melting Slicks
Joined: Dec 2004
Posts: 2,137
Likes: 5
From: Howard PA
Triacs and SCR are not linear devices. They are either on or off so why do you feel this part would be a Triac or SCR? I would assume it's a regular transistor because it's a dimmer right? The voltage output needs to vary. Slim chance it's an SCR, there isn't enough controlling circuit to create the high speed switching that would be required.
Triacs are usually used in AC circuits becuse the junction is bi-directional.
It's not that complicated, it's a transistor. You just need to figure out whats base, collector and emitter. It's also most definately an NPN transistor because a PNP needs to decrease the volatge on the base to increase the output on the collector. They just wouldn't design it like this, it wouldn't be cost effective.
Triacs are usually used in AC circuits becuse the junction is bi-directional.
It's not that complicated, it's a transistor. You just need to figure out whats base, collector and emitter. It's also most definately an NPN transistor because a PNP needs to decrease the volatge on the base to increase the output on the collector. They just wouldn't design it like this, it wouldn't be cost effective.
Last edited by ALLT4; May 13, 2005 at 04:05 PM.
Drifting
Joined: Nov 2002
Posts: 1,593
Likes: 0
From: Mobile AL
St. Jude Donor '05
There are no Triacs or SCRs on the schematic he included, only NPN transistors, so it has to be one of those, and there are no part numbers on the diagram, only designations for the semiconductor parts. I'd take the schematic and the part to a good repair shop (NOT Radio Shack) and ask them for assistance.
Drifting
Joined: Mar 2005
Posts: 1,923
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From: GA
Found a cross ref..they are calling it an Insulated Gate Bipolar Transistor.
Listed here http://www.digikey.com/scripts/DkSea...S&Cat=31130406
Listed here http://www.digikey.com/scripts/DkSea...S&Cat=31130406
Last edited by Morley; May 13, 2005 at 05:53 PM.
Melting Slicks
Joined: Dec 2004
Posts: 2,137
Likes: 5
From: Howard PA
Originally Posted by Morley
Found a cross ref..they are calling it an Insulated Gate Bipolar Transistor.
Listed here http://www.digikey.com/scripts/DkSea...S&Cat=31130406
Listed here http://www.digikey.com/scripts/DkSea...S&Cat=31130406
Drifting
Joined: Jul 2004
Posts: 1,358
Likes: 291
From: MA
I stand corrected 
I looked at he schematic quickly and did not realize it was the correct manufacturers (GM) drawing. Tough day at the office.
I then followed the link and found out what terminals A,B,C,D,E were connected to.
Indeed it looks as though an NTE 377 would work as long as the lamps don't draw more than the 10 amps the transistor is rated for.
The NTE 331 may be a safer choice as it can handle 15 amps and power dissipation of 90 watts.
I looked at he schematic quickly and did not realize it was the correct manufacturers (GM) drawing. Tough day at the office.
I then followed the link and found out what terminals A,B,C,D,E were connected to.Indeed it looks as though an NTE 377 would work as long as the lamps don't draw more than the 10 amps the transistor is rated for.
The NTE 331 may be a safer choice as it can handle 15 amps and power dissipation of 90 watts.
