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Bigger ferrite beads are better? (more attenuative)

Discussion in 'PCB Layout, Design and Manufacture' started by eem2am, Jul 21, 2021 at 1:36 PM.

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  1. eem2am


    Aug 3, 2009
    Both of these ferrite beads are 120R at 100MHz...

    0402 ferrite bead:

    0603 ferrite bead:

    Would you agree that the 0603 size bead is better?, ......because having a longer distance between its terminals, it means less radiated emissions will be able to "jump over it" (couple round it, instead of going through it and getting attenuated)
  2. bertus

    bertus Moderator

    Nov 8, 2019

    Compare the DC rating and the DC resistance.
    What do you need?

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