PCB Libraries Forum : Mounting Holes: Satellite Vias Standard? https://www.PCBLibraries.com/forum/ Mon, 20 Apr 2026 19:37:34 +0000 Mon, 16 Oct 2023 08:21:42 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=3328 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[Mounting Holes: Satellite Vias Standard? : Satellite vias are usually used...]]> https://www.PCBLibraries.com/forum/mounting-holes-satellite-vias-standard_topic3328_post13286.html#13286 Author: Tom H
Subject: 3328
Posted: 16 Oct 2023 at 8:21am

Satellite vias are usually used for mounting holes that need extra support for mounting hardware. 

When using torque to screw to a nut with washer you might need the extra support to prevent crushing the FR4 glass. 

Without this support of satellite vias, you might crush the FR4 glass with too much torque. 

Also, because screws going to mounting holes might need to be grounded, the satellite vias provide extra grounding support. 

]]> Mon, 16 Oct 2023 08:21:42 +0000 https://www.PCBLibraries.com/forum/mounting-holes-satellite-vias-standard_topic3328_post13286.html#13286 <![CDATA[Mounting Holes: Satellite Vias Standard? : Hello,Are there any standards...]]> https://www.PCBLibraries.com/forum/mounting-holes-satellite-vias-standard_topic3328_post13283.html#13283 Author: teamcomtac
Subject: 3328
Posted: 16 Oct 2023 at 3:03am

Hello,

Are there any standards / guidelines on Satellite Vias of Mounting holes? 

The hole size is given by the screw diameter and the pad size is given by the screw's head / washer but what about satellite vias?

- At which distance from the center should the vias be placed? Under the head? Outside of the head?
- What should the diameter of the vias be? Is it proportional to the hole's dimension?

Thanks in advance!

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