Applications: 1.In the dc-immune current filtering and choking coiles in auto audio system, filtering inductance in power supply. 2.Smoothing inductor, stored inductance, dmc, pfc correction inductor, etc. Properties: 1.Made of fe-based amorphous ribbon, low loss in high frequency. 2.Magnetic circuit closing, reduction of flux leakage, excellent characteristics of anti-dc current skewing of magnetic field. 3.High permeability, to be adjusted by changing the winding turns. Paper ctn