Core for use in inductive element, transformer and inductor

摘要

The present invention provides an inductor having a small core loss at a high frequency. The inductor includes a transformer that has a core formed of a base core and a cover core, and a conductive plate sandwiched between the base core and the cover core, as well as a conductive plate sandwiched between the base core and the cover core. The base core is composed of a Mn-Zn ferrite with a mean grain size of 5 mu m or less. The transformer has a small core loss at a high frequency band without a decrease in power transmission efficiency.