Ferrites are ceramic, homogeneous materials composed of various oxides with iron oxide as their main constituent. Ferrites can have several distinct crystal structures. Ferrite core (Some time we call it Soft ferrite) is one of ferrites which has a cubic crystal structure. Ferrite cores are widely used in electrical industry. There are two major categories: Manganese-Zinc ferrite and Nickel-Zinc ferrite. In each of these categories, many different MnZn and NiZn material grades. The two families of MnZn and NiZn ferrite materials complement each other.