I directed my attention to a paper regarding the modeling of common-mode chokes. Within this paper, the authors structured the circuit in such a manner that they designated the core resistance (parallel to the inductor) as 2*Rp, and the capacitance to be equal to Cp/2. What is the rationale behind this approach? Furthermore, what alterations would occur to the same circuit if I were to design a multiple resonance circuit for a common-mode choke? enter image description here

Here's https://ieeexplore.ieee.org/document/8094720 1: Characterization of Common-Mode Choke for Automotive Ethernet Networks enabling 100 Mbit/s

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    \$\begingroup\$ What's the rational? Why not?! \$\endgroup\$
    – Neil_UK
    Mar 5 at 18:03
  • \$\begingroup\$ According to Fig 6 it matches reality pretty well. \$\endgroup\$ Mar 5 at 18:05

1 Answer 1


Typically, the resistances RP represent magnetic material losses and Cp the parasitic self-capacitances of the windings.

If you need to design a multiple-resonance circuit, you should have a more complete model. There are also leakage inductances and capacitances between choke inputs and outputs.

  • \$\begingroup\$ Thanks you for your valuable feedback ... \$\endgroup\$
    – Alaska
    Mar 6 at 6:21

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