Nonmagnetic ferrite dielectric for common mode choke

The invention relates to a nonmagnetic ferrite dielectric for a common mode choke, the common mode choke provided with the nonmagnetic ferrite dielectric, a DC/DC converter using the common mode choke, and a manufacturing method for the nonmagnetic ferrite dielectric. In some embodiments, the common mode choke comprises a main body substantially having a rectangular shape; the main body has a first end and a second end which are oppositely arranged; the main body also comprises a lower ferrite part, an upper ferrite part and at least one pair of internal conductors; the internal conductors are disposed inside the main body and are transversely spaced; the internal conductors are substantially arranged between the upper ferrite part and the lower ferrite part; and the internal conductors longitudinally extend from the portion near the first end of the main body substantially having the rectangular shape to the portion near the second end of the main body. The common mode choke also can comprise the nonmagnetic ferrite dielectric which is disposed inside the main body and is transversely arranged between the at least one pair of the internal conductors.