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Old 12th November 2004, 01:27 PM   #1
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Default 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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Old 12th November 2004, 01:33 PM   #2
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Try Mouser Electronics
www.mouser.com
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Old 12th November 2004, 02:15 PM   #3
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Nope. They don't have it.
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Old 12th November 2004, 02:36 PM   #4
sam9 is offline sam9  United States
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Correct me if I'm wrong, but I think that a T)-247 insulator is close enough in dimention to do the job.
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Old 12th November 2004, 05:34 PM   #5
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A TO-247 is 825x626x198 mils, and TO-264 is 1023x783x196 mils. Kind of a big difference, especially in the height.
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Old 12th November 2004, 06:30 PM   #6
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Digikey 3M541334-ND a lifetime supply? or sil-pad sheets
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Old 12th November 2004, 06:52 PM   #7
BrianGT is offline BrianGT  United States
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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
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Old 12th November 2004, 10:11 PM   #8
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Thanks, BrianGT. I think I'll use the 4180's.
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Old 14th November 2004, 12:58 AM   #9
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Kapton tape of the correct width does the job very nicely.





-Matt
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Old 14th November 2004, 01:24 AM   #10
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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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