The FB series M type chip bead inductors have a unique internal structure, which is optimized to have an impedance peak in the frequency range between 10–100 MHz. Impedance is 1,800 Ω at a frequency of 10 MHz and 10,000 Ω at a frequency of 30 MHz. This chip bead inductor is aimed at suppressing noise in power-supply lines at a frequency range from 10–100 MHz, which is a disadvantage seen with conventional inductors. To suppress noise in this frequency range, the makers say, AC line filters or common mode choke coils have traditionally been used. These inductors offer a solution for reducing size and weight in AC-DC converters.
Taiyo Yuden; www.taiyo-yuden.com