... UI Ferrite CoreGeneral Introduction 1, UF ferrite core and UI ferrite core, these Soft ferrite shapes are available in ... shielding is poor. 4, UF core, UI core and other U cores have two core legs. Coils can be placed ... series features less winding resistance. Applications:May be used as split-core current transformers, output transformer core, line transformer core, liner filter and Inverter core ...