GBn198-88 standard, 1J1851J86 with high-permeability and high- saturation flux density Ni-Fe alloy MaterialGBn198-88 standard, 1J50…1J86 with high-permeability and high- saturation flux density Ni-Fe alloyCharacteristicUsually it is toroidal coreApplicationIt is widely used in precision mutual inductor, switching mode power supply transformer and precision inductance Permalloy Alloy