TO-264 insulators?

dmitriy167 · 12th November 2004, 01:27 PM

Hello,

I've been looking for insulators for TO-264 package transistors, but can't seem to find them anywhere. Does anyone know where to find them?

audiopro · 12th November 2004, 01:33 PM

Try Mouser Electronics
www.mouser.com

dmitriy167 · 12th November 2004, 02:15 PM

Nope. They don't have it.

sam9 · 12th November 2004, 02:36 PM

Correct me if I'm wrong, but I think that a T)-247 insulator is close enough in dimention to do the job.

dmitriy167 · 12th November 2004, 05:34 PM

A TO-247 is 825x626x198 mils, and TO-264 is 1023x783x196 mils. Kind of a big difference, especially in the height.

BobEllis · 12th November 2004, 06:30 PM

Digikey 3M541334-ND a lifetime supply? or sil-pad sheets

BrianGT · 12th November 2004, 06:52 PM

I have used these from mouser:
http://www.mouser.com/index.cfm?hand..._pcodeid=53201

The data for the 4180 pad is here:
http://www.aavidthermalloy.com/produ...insulate.shtml

The surface of the package is covered, and the pad is thick enough to isolate it from the heatsink.

The 4170 pads are smaller, but I used them for TO-264 devices once as well:
http://www.briangt.com/gallery/jeeta...ize_of_amp_016
Most of the surface is covered on the bottom of the package, and the heat transfers quite well. The 4180 pads are quite a lot bigger, and work perfect for the TO-264 IMO.

--
Brian

dmitriy167 · 12th November 2004, 10:11 PM

Thanks, BrianGT. I think I'll use the 4180's.

zagisrule! · 14th November 2004, 12:58 AM

Kapton tape of the correct width does the job very nicely.

-Matt

Maxhawk · 14th November 2004, 01:24 AM

I used insulators for TO-3P package on my TO-264's and they worked just fine.

You can find them at Parts Express for $1.50/10

Insulators

12th November 2004, 01:27 PM	#1
dmitriy167 diyAudio Member Join Date: Mar 2004 Location: NJ, USA	TO-264 insulators? Hello, I've been looking for insulators for TO-264 package transistors, but can't seem to find them anywhere. Does anyone know where to find them?

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12th November 2004, 01:33 PM	#2
audiopro diyAudio Member Join Date: Feb 2004 Location: Hamilton, ON	Try Mouser Electronics www.mouser.com

12th November 2004, 02:15 PM	#3
dmitriy167 diyAudio Member Join Date: Mar 2004 Location: NJ, USA	Nope. They don't have it.

12th November 2004, 02:36 PM	#4
sam9 diyAudio Member Join Date: Jun 2002 Location: Left Coast	Correct me if I'm wrong, but I think that a T)-247 insulator is close enough in dimention to do the job.

12th November 2004, 05:34 PM	#5
dmitriy167 diyAudio Member Join Date: Mar 2004 Location: NJ, USA	A TO-247 is 825x626x198 mils, and TO-264 is 1023x783x196 mils. Kind of a big difference, especially in the height.

12th November 2004, 06:30 PM	#6
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	Digikey 3M541334-ND a lifetime supply? or sil-pad sheets

12th November 2004, 06:52 PM	#7
BrianGT diyAudio Moderator Emeritus Join Date: Jan 2002 Location: near Atlanta, GA	I have used these from mouser: http://www.mouser.com/index.cfm?hand..._pcodeid=53201 The data for the 4180 pad is here: http://www.aavidthermalloy.com/produ...insulate.shtml The surface of the package is covered, and the pad is thick enough to isolate it from the heatsink. The 4170 pads are smaller, but I used them for TO-264 devices once as well: http://www.briangt.com/gallery/jeeta...ize_of_amp_016 Most of the surface is covered on the bottom of the package, and the heat transfers quite well. The 4180 pads are quite a lot bigger, and work perfect for the TO-264 IMO. -- Brian

12th November 2004, 10:11 PM	#8
dmitriy167 diyAudio Member Join Date: Mar 2004 Location: NJ, USA	Thanks, BrianGT. I think I'll use the 4180's.

14th November 2004, 12:58 AM	#9
zagisrule! diyAudio Member Join Date: Apr 2004 Location: Edgewood, NM	Kapton tape of the correct width does the job very nicely. -Matt

14th November 2004, 01:24 AM	#10
Maxhawk diyAudio Member Join Date: Oct 2002 Location: Duluth, GA	I used insulators for TO-3P package on my TO-264's and they worked just fine. You can find them at Parts Express for $1.50/10 Insulators

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