Glossary of Terms Common Mode Choke

AC Current:

Maximum AC line current through the choke windings.

DC Current:

Maximum DC current through coil windings.

EMI Frequency Range:

Frequency range of interference the choke is to filter.


Maximum isolation voltage from winding to winding or winding to core / ground.

Hipot Duration:

Length of time in seconds to test device at the hipot voltage.


Inductance of one winding.

Leakage Inductance:

Represents energy stored in non-magnetic regions between windings, caused by imperfect flux coupling.

Line Frequency:

Frequency of line power applied to windings.

Required finished dimensions:

The dimensions of the space allotted for the choke.


Voltage between windings.