What's the difference between 'ferrite beads' and 'coupled ferrite beads'?

Thread Starter

abhishekanirudhan6@gmail.

Joined Jun 12, 2024
1
I have recently wandered into the rather vague world of ferrite beads and EMI/EMC suppression. I was advised to find out more about 'coupled ferrite beads' as that apparently happens to better than regular ferrite beads (The person who suggested this doesn't have any resources that could help me). I did a decent amount of surfing around the web as well as in a few journals, but I couldn't find much useful information. If anyone has more information about this matter, any material/paper/articles etc. or any other resources I could make effective use of, could you please share it?
 

Ya’akov

Joined Jan 27, 2019
9,275
Welcome to AAC.

These are two different things. A coupled ferrite bead is distinguished by having more than one element and a common core. Where a simple ferrite is used to suppress high frequency noise in a single line, a coupled ferrite is used for common mode noice rejection.

So, depending on your application you might choose one or the other. Coupled ferrites are not “better”, they address a different problem.
 
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