Post by thread:[EE]: Heat-sink conductive material?

Hey folks, I need to find some sort of material that I can place between a TO-220 device and a heatsink, that would "fill" an uneven gap. I only know of mica sheets and thermal heat-sink grease (which I'm using), but I'm need something more "squishable" that will conform to the shape of the gap when squeezed. Of course, if needs to promote thermal heat transfer, but does not matter if it conducts electricity or not. No, it's not easy to adjust it so that the surfaces are more parallel to each other. Cheers, -Neil. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

{Quote hidden}> -----Original Message----- > From: Pic Dude [SMTP:spam_OUTpicdudeTakeThisOuTAVN-TECH.COM] > Sent: Thursday, July 04, 2002 2:31 AM > To: .....PICLISTKILLspam@spam@MITVMA.MIT.EDU > Subject: [EE]: Heat-sink conductive material? > > Hey folks, > > I need to find some sort of material that I can place > between a TO-220 device and a heatsink, that would > "fill" an uneven gap. I only know of mica sheets and > thermal heat-sink grease (which I'm using), but I'm > need something more "squishable" that will conform to > the shape of the gap when squeezed. Of course, if > needs to promote thermal heat transfer, but does not > matter if it conducts electricity or not. > > No, it's not easy to adjust it so that the surfaces > are more parallel to each other. > > Cheers, > -Neil. > Several manufacturers make the material you are looking for. Raychem is one of the larger and make a range of products under their "HeatPath" brand name. Thickness up to 15mm can be obtained, although the thermal conductivity is not great when you use larger the thickness material. If you can find a local distributor you can probably extract a sample pack of all the common types that they sell. Regards Mike -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listservKILLspammitvma.mit.edu with SET PICList DIGEST in the body

www.powerdevices.com/isostrate2000.htm Marcelo Y. {Quote hidden}>-----Original Message----- >From: pic microcontroller discussion list >[.....PICLISTKILLspam.....MITVMA.MIT.EDU]On Behalf Of Pic Dude >Sent: Wednesday, July 03, 2002 10:31 PM >To: EraseMEPICLISTspam_OUTTakeThisOuTMITVMA.MIT.EDU >Subject: [EE]: Heat-sink conductive material? > > >Hey folks, > >I need to find some sort of material that I can place >between a TO-220 device and a heatsink, that would >"fill" an uneven gap. I only know of mica sheets and >thermal heat-sink grease (which I'm using), but I'm >need something more "squishable" that will conform to >the shape of the gap when squeezed. Of course, if >needs to promote thermal heat transfer, but does not >matter if it conducts electricity or not. > >No, it's not easy to adjust it so that the surfaces >are more parallel to each other. > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listservspam_OUTmitvma.mit.edu with SET PICList DIGEST in the body

We used some stuff called Silpad(commerical name?). A gray sorta smooth cloth looking stuff. Both insulates and conducts heat. > Hey folks, > > I need to find some sort of material that I can place > between a TO-220 device and a heatsink, that would > "fill" an uneven gap. I only know of mica sheets and > thermal heat-sink grease (which I'm using), but I'm > need something more "squishable" that will conform to > the shape of the gap when squeezed. Of course, if > needs to promote thermal heat transfer, but does not > matter if it conducts electricity or not. > > No, it's not easy to adjust it so that the surfaces > are more parallel to each other. Mike DeMetz N9GEZ Elkhart, IN @spam@n9gezKILLspamqsl.net http://www.elkhart.net/~miked -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email KILLspamlistservKILLspammitvma.mit.edu with SET PICList DIGEST in the body

On Wed, 3 Jul 2002, Pic Dude wrote: >Hey folks, > >I need to find some sort of material that I can place >between a TO-220 device and a heatsink, that would >"fill" an uneven gap. I only know of mica sheets and >thermal heat-sink grease (which I'm using), but I'm >need something more "squishable" that will conform to >the shape of the gap when squeezed. Of course, if >needs to promote thermal heat transfer, but does not >matter if it conducts electricity or not. > >No, it's not easy to adjust it so that the surfaces >are more parallel to each other. There are silicone pads loaded with something. They are dark gray. I don't know who makes them, maybe someone else on the list does. They have a raised 'tube' that fits in the hole of TO220 devices so only a normal washer is needed. They are good to 2kV or so. Peter -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email RemoveMElistservTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body