Brief

 

 

Ferrite cores is mainly composed with 3 kinds of metallic elements (FE, Mn and Zn).which is called Mn-Zn ferrite or soft ferrite.
Ring ferrite cores have high magnetic effect because of no gap and same cross-sectional the wide frequency range,
it has high electric resistance and low eddy current loss. So it has become the ideal material for high frequency transformer,
wide-band transformer, adjustable inductors and other high frequency circuit from 10 kHz to 50MHz.