[sdiy] Epoxy, good heat container?

[John Luciani]

On Sat, Feb 23, 2008 at 6:29 PM, karl dalen <dalenkarl at yahoo.se> wrote:
> Does epoxy spread and maintain distributed heat well?
>

Some epoxies do. One of the reasons that some power semiconductors and
power supplies
are encapsulated in epoxy is to increase the thermal conductivity. A
couple of epoxy
vendors that come to mind are Epoxy Technologies and Castall.

There is also a thermally conductive type of rubber encapsulant that
is less rigid than
the epoxy.

If you are going to encapsulate your circuits in a rigid material you
need to be careful
that the thermal expansion and contraction doesn't destroy component
packages (e.g. glass diodes)
or damage the solder connections (like shearing SMD components).

(* jcl *)

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