EMC Question of the Week: June 15, 2026

A poor common-mode filter design

A schematic for a DC power line filter is shown in the figure. The device is located in a metal enclosure. In order to filter the common-mode power bus noise effectively, which of the components shown in the schematic must be eliminated?  

  1. L2
  2. L3
  3. CX1 and CX2
  4. CX4 and CX5

Reveal Question of the Week - Answer 260615