Cost-effective thermal gap pad

[jram]

Hi,

I have a project where I'm using 2 solid copper busbars not only for current capacity but also to conduct heat to the aluminium case for cooling.  My plan is to use nylon or insulated bolts to attach them to the case and ensure a snug fit.  Clearly I'll need an appropriate layer between the busbars and the case to prevent current flow but also be a competent thermal conductor.  I've looked at a bunch of products that seem to fit the bill but I'd welcome advice from those who have actually faced this problem as to configurations, thicknesses and products used.

Thanks

John

[GadgetBoy]

Look for heat sink silicone sheets.

Sent from my ONEPLUS A3000 using Tapatalk

[Eka]

Depends on how much you need, and how thick?

This one at Amazon is 100 mm square
https://smile.amazon.com/gp/product/B01A9RHAH4

Berquist Gap Pads, plus others manufaturers are available at Digikey.
https://www.digikey.com/products/en?keywords=Berquist%20Gap%20Pad
many different types and thicknesses. Some are in sheet form.

I use them to transfer heat from DC to DC converters to the aluminum frames of my sculptures. The nice thing is you don't need a milled flat surface if the pad is thick enough, and the parts can handle lower heat transfer rates due to the greater gap.