FAQ
Q.
Why are common mode filters / chokes necessary?
  • EMV-Bauelemente
    • >
  • Gleichtaktdrossel/Filter für Signalleitungen


A. Common mode filters (common mode chokes) are used for noise suppression of differential transmission and power lines.
Filters and chokes are effective for suppression of radiation noise from electronic devices and cables, and for self-poisoning countermeasures (improved reception sensitivity) and noise immunity inside of wireless devices.
TDK’s common mode filters and chokes come in a diverse lineup for each type of usage. TDK has prepared a selection guide that makes it easy to check representative products.

All related FAQ
Q.
In which locations can common mode filters (common mode chokes) be effectively used as EMC countermeasure components?
  • Gleichtaktdrossel/Filter für Signalleitungen
Q.
Please provide instructions on how to select common mode filters (common mode chokes).
  • Gleichtaktdrossel/Filter für Signalleitungen
Q.
TDK’s common mode filters (common mode chokes) include multilayer products, thin-film products, and wire wound products, but what are their differences (features)?
  • Gleichtaktdrossel/Filter für Signalleitungen
Q.
It seems that there is no mark indicating the winding direction (polarity) on common mode filters / chokes. If their directions are different when they are mounted, would the properties change?
  • Gleichtaktdrossel/Filter für Signalleitungen
Q.
Are there any problems in mounting common mode filters / chokes in GND-signal lines?
  • Gleichtaktdrossel/Filter für Signalleitungen
Q.
Can common mode filters / chokes be used on the primary side of a power supply? Can common mode filters / chokes be used in AC lines?
  • Gleichtaktdrossel/Filter für Signalleitungen
Q.
Are there any problems in mounting common mode filters / chokes for signal lines?
  • Gleichtaktdrossel/Filter für Signalleitungen
Q.
Where can I confirm the weight of common mode filters (common mode chokes)?
  • Gleichtaktdrossel/Filter für Signalleitungen
Q.
Do common mode filters / chokes generate heat?
  • Gleichtaktdrossel/Filter für Signalleitungen
Q.
Where can I view a list of TDK’s common mode filters (common mode chokes)?
  • Gleichtaktdrossel/Filter für Signalleitungen
Q.
Where can the reflow conditions of TDK’s common mode filters (common mode chokes) be confirmed?
  • Gleichtaktdrossel/Filter für Signalleitungen