FAQ
Q.
Are there any problems in mounting common mode filters / chokes for signal lines?
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  • Signal Line Common Mode Chokes/Filters


A. There is no problem using common mode filters (common mode chokes) for power sources in signal lines.
However, if you wish to use common mode filters or chokes for signal lines in a DC line (not recommended), please pay attention to the rated current, etc.
Please refer to the Selection Guide published by TDK in order to confirm products based on the usage method.

All related FAQ
Q.
Why are common mode filters / chokes necessary?
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Q.
In which locations can common mode filters (common mode chokes) be effectively used as EMC countermeasure components?
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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)?
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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?
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Q.
Are there any problems in mounting common mode filters / chokes in GND-signal lines?
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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?
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Q.
Where can I confirm the weight of common mode filters (common mode chokes)?
  • Signal Line Common Mode Chokes/Filters
Q.
Do common mode filters / chokes generate heat?
  • Signal Line Common Mode Chokes/Filters
Q.
Where can I view a list of TDK’s common mode filters (common mode chokes)?
  • Signal Line Common Mode Chokes/Filters
Q.
Where can the reflow conditions of TDK’s common mode filters (common mode chokes) be confirmed?
  • Signal Line Common Mode Chokes/Filters