Q.
Please provide instructions on how to select common mode filters (common mode chokes).
- EMC Components >
- Signal Line Common Mode Chokes/Filters
A.
Select those that have a cutoff frequency three to five times greater than the transmission signal frequency and exhibit high impedance at the frequency at which noise is desired to be suppressed.
In addition, please remember that rated currents differ by product in DC lines. Be sure to check the rated current.
As a tool for selecting products, TDK offers a “Search by Characteristics” and a “Selection Guide,” as well as a “Cross Reference” function for confirming TDK products from products of other companies.
