FAQ
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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  • Signal Line Common Mode Chokes/Filters


A. Common mode filters (common mode chokes) cannot be used for the primary side of a power supply or for an AC line. Please use a signal line or DC power source line.
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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Are there any problems in mounting common mode filters / chokes in GND-signal lines?
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Are there any problems in mounting common mode filters / chokes for signal 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