PCB Libraries Forum : Three Pin Ferrite Beads https://www.PCBLibraries.com/forum/ Thu, 16 Apr 2026 01:39:14 +0000 Thu, 25 Oct 2012 10:30:37 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=629 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[Three Pin Ferrite Beads : The strangest thing about the...]]> https://www.PCBLibraries.com/forum/three-pin-ferrite-beads_topic629_post2135.html#2135 Author: DaveCowl
Subject: 629
Posted: 25 Oct 2012 at 10:30am

The strangest thing about the pattern is that the white areas are (from the best I can tell) devoid of solder mask. Which is a pretty huge solder mask opening, that is essentially 'open ended' on the top and bottom.

The solder mask pattern is the light grey.

My tendency would be to have a more typical solder mask pattern that is essentially the inverse of the pads.

Perhaps the recommendation is the minimum required solder mask?

I am not sure what to make of this...
]]> Thu, 25 Oct 2012 10:30:37 +0000 https://www.PCBLibraries.com/forum/three-pin-ferrite-beads_topic629_post2135.html#2135 <![CDATA[Three Pin Ferrite Beads : I would go with the mfr. recommended...]]> https://www.PCBLibraries.com/forum/three-pin-ferrite-beads_topic629_post2133.html#2133 Author: Tom H
Subject: 629
Posted: 25 Oct 2012 at 10:15am

I would go with the mfr. recommended pattern. The CM must have tested it on a reference design to proof it out. This package is a unique one-of-a-kind non-standard part.
 
It needs to be built once, built right and never built again by anyone. But we'll get there soon.
 
]]> Thu, 25 Oct 2012 10:15:21 +0000 https://www.PCBLibraries.com/forum/three-pin-ferrite-beads_topic629_post2133.html#2133 <![CDATA[Three Pin Ferrite Beads : Has anyone dealt with the...]]> https://www.PCBLibraries.com/forum/three-pin-ferrite-beads_topic629_post2132.html#2132 Author: DaveCowl
Subject: 629
Posted: 25 Oct 2012 at 10:10am

Has anyone dealt with the Ferrite Beads like the Murate NFE31P parts that have a barrel with a middle GND pin on a MELF like construction?



The recommended footprint from Murata is very odd and of course it defies naming conventions or standard footprint generation.

The land pattern that I inherited basically looks like a 1206 with an extra pad in the middle, but that is far from the recommended shape, which is odd since the end pads are narrower than the part itself, though the end caps are round...

I will try to include the footprint for reference.

Thoughts or recommendations? Just run with the recommended land pattern?
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