Common mode power chokes are based on high permeability ferrite toroids with two symmetrical windings. The operating current flows through them in such a way that the magnetics fields cancel each other out. The operating current is only affected by the low stray inductance of the windings. If the currents in the windigs are different, because of asymmetric interference, a high inductance works on the differential current.
These chokes are used mainly for RFI suppression of power electronic instruments, appliances and machines. Moreover these highly symmetrical chokes can be used as transformers as well as for potential separation.
Our standard offer consists of single phase chokes PMEC 106/H (do not use for new design), 106/Hs and PMEC 106/Vn series.