cheapest source of heatsink/thermal pads?

DonoMan · 15th July 2005, 04:55 PM

What's the cheapest source for non-electrically-conductive thermal pads? I found some on Ebay, but they seem to be more expensive than the ones I found on Digikey, but I might not be searching by the best terms.

Edit: the ones from Digikey I was looking at are PN BER179-ND

rwagter · 15th July 2005, 05:05 PM

Try get some from berquist themselfs, I just send 1 email to the distributor and ended op getting 12 nice silicon based thermal pads for to-247 for free

DonoMan · 15th July 2005, 06:02 PM

ok, I'll try that, thanks

bocka · 15th July 2005, 07:53 PM

Any silicone thermal pad sucks. I've just measured some in TO-220 housing. Regardless which I've used (Bergquist, Fischer and some other) they have a thermal resistance of 2K/W and more.

When I changed to the good old micas and using thermal grease I could simply obtain half of the thermal resistance. In other words: When using micas you can use a smaller heatsink.

rwagter · 15th July 2005, 07:59 PM

Bocka,

you're absolutely right. The pads I got were k10's and there kapton (and not silicon): thermal resistanse 0,2C/W

DonoMan · 15th July 2005, 11:26 PM

can you give me like a digikey/mouser part no.?

rwagter · 16th July 2005, 07:51 AM

BER120-ND

AndrewT · 16th July 2005, 08:50 AM

Hi,
someone recently posted a link to WWW.kaptontape.com
They supply adhesive backed 1mil and 2mil by 0.75inch wide Kapton tape. Only $10 & $14 for 36yds. That's about 1 cent per To264.

15th July 2005, 04:55 PM	#1
DonoMan diyAudio Member Join Date: Feb 2005 Location: Massachusetts	cheapest source of heatsink/thermal pads? What's the cheapest source for non-electrically-conductive thermal pads? I found some on Ebay, but they seem to be more expensive than the ones I found on Digikey, but I might not be searching by the best terms. Edit: the ones from Digikey I was looking at are PN BER179-ND

16th July 2005, 08:50 AM	#8
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, someone recently posted a link to WWW.kaptontape.com They supply adhesive backed 1mil and 2mil by 0.75inch wide Kapton tape. Only $10 & $14 for 36yds. That's about 1 cent per To264. __________________ regards Andrew T.

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15th July 2005, 05:05 PM	#2
rwagter diyAudio Member Join Date: Jul 2002 Location: Netherlands	Try get some from berquist themselfs, I just send 1 email to the distributor and ended op getting 12 nice silicon based thermal pads for to-247 for free

15th July 2005, 06:02 PM	#3
DonoMan diyAudio Member Join Date: Feb 2005 Location: Massachusetts	ok, I'll try that, thanks

15th July 2005, 07:53 PM	#4
bocka diyAudio Member Join Date: Jul 2003 Location: Hannover	Any silicone thermal pad sucks. I've just measured some in TO-220 housing. Regardless which I've used (Bergquist, Fischer and some other) they have a thermal resistance of 2K/W and more. When I changed to the good old micas and using thermal grease I could simply obtain half of the thermal resistance. In other words: When using micas you can use a smaller heatsink.

15th July 2005, 07:59 PM	#5
rwagter diyAudio Member Join Date: Jul 2002 Location: Netherlands	Bocka, you're absolutely right. The pads I got were k10's and there kapton (and not silicon): thermal resistanse 0,2C/W

15th July 2005, 11:26 PM	#6
DonoMan diyAudio Member Join Date: Feb 2005 Location: Massachusetts	can you give me like a digikey/mouser part no.?

16th July 2005, 07:51 AM	#7
rwagter diyAudio Member Join Date: Jul 2002 Location: Netherlands	BER120-ND

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