Characteristics
- Printed circuit board for evaluation of different EMC-filters
- To evaluate and select different filter components for the best possible common and differential mode attenuation for your application
- THT (Through Hole Technology) mounting
Components are not included!
Applications
- Line filter with good suitability even for unknown source and sink impedances
- Suppression of conducted interferences caused, for example, by switch mode power supplies
- AC mains applications up to 250 V
- Important information: This is an evaluation board. The board should not be installed in the final application.
Application Notes
Common and differential mode attenuation
LC filter for common mode suppression
The Common Mode Choke (CMC) and the Y-Capacitors (CY1, CY2) build a low-pass for high frequency common mode interferences. While Y-Capacitors divert high-frequency interference towards ground, it is attenuated by the Common Mode Choke due to the high common mode impedance.
Pi filter for differential mode suppression
In this circuit, the X-Capacitors (CX1 and CX2) and the Leakage Inductance (LLeak) of the Common Mode Choke built a low-pass filter. The high frequency interference is filtered while the supply current, which typically has a much lower frequency (50 - 60 Hz), remains almost unaffected.
Suitable common mode chokes
Suitable capacitors
Suitable electromechanical components
Design Kits
Videos
Würth Elektronik Webinar: EMC Filters – From component to design
Videos
#askLorandt erklärt: Schritt für Schritt-Aufbau eines EMV-Netzfilters
Videos
Wie man EMV Probleme löst! || Das Mysterium des surrenden Lautsprechers