High flux iron nickel magnetic core is a kind of magnetic particle core containing 50% nickel and 50% iron with distributed air gap. HF iron nickel powder core has a saturation magnetic flux density of 13000 Gauss, and its loss value is much lower than that of pure iron powder core. It is an ideal choice for switching power modulation inductors, line noise filters, pulse transformers and flyback transformers. Especially in the case of large DC current, the use of HF magnetic powder core can effectively reduce the size of inductor, thereby reducing the total cost.