Specifications Nanocrystalline alloys core, with high initial permeability, and effective noise suppression. Application Fields Used for Current Transformer or Power Transformer in Power Supply System. Performance Characteristics Made of Co-based amorphous alloys or Fe-based nanocrystalline alloys, with high initial permeability, and can effectively eliminate the noise created by EMI common-mode Basic Parameters Core Size: as required Le, Ae, AL: as required