Path: ...!news.misty.com!weretis.net!feeder6.news.weretis.net!newsfeed.hasname.com!usenet.blueworldhosting.com!diablo1.usenet.blueworldhosting.com!feeder.usenetexpress.com!tr2.iad1.usenetexpress.com!69.80.99.22.MISMATCH!local-2.nntp.ord.giganews.com!news.giganews.com.POSTED!not-for-mail NNTP-Posting-Date: Sat, 30 Mar 2024 22:54:04 +0000 From: Joe Gwinn Newsgroups: sci.electronics.design Subject: Re: silicone grease Date: Sat, 30 Mar 2024 18:54:03 -0400 Message-ID: References: User-Agent: ForteAgent/8.00.32.1272 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 15 X-Usenet-Provider: http://www.giganews.com X-Trace: sv3-y5fQzTz3QEc5dlOfgPvSR2x/PGJ/Pj6oKXP307zLRs3tdNzJya9TCjCAVsIaToung6aSmZm/JE8kT5l!UxijeJwu8npHab4MAQ2FD59wIgc1qGj49X7M1EiyaApBzeHWTn4m5UvdfM7O96j3LEGMlFI= X-Complaints-To: abuse@giganews.com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 1915 On Sat, 30 Mar 2024 11:14:10 -0700, John Larkin 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