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NNTP-Posting-Date: Sat, 30 Mar 2024 22:54:04 +0000
From: Joe Gwinn <joegwinn@comcast.net>
Newsgroups: sci.electronics.design
Subject: Re: silicone grease
Date: Sat, 30 Mar 2024 18:54:03 -0400
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On Sat, 30 Mar 2024 11:14:10 -0700, John Larkin <jl@997PotHill.com>
wrote:

>Give a nice flat mosfet package and a flat heat sink, I wonder how
>much benefit accrues from adding silicone grease. It's really messy in
>production and it's hard to confirm proper application. A little
>googling didn't provide hard numbers.
>
>I'm thinking a big-die TO-220 fet, bolted to a copper CPU cooler, AlN
>or mica insulator, no grease, 40 watts. I guess I'll have to try it.

The big problem is likely that one must design for it to be dry, so
when the grease drools away, the product won't melt.

Joe Gwinn