... bobbin 4.series: EE,EI,EF,EFD,EER,DR,EC,PQ EE CORE Applications:Transformers and chokes for switching power ... , various types of filters, inductors and chokes. U CORE Applications:Mainly used for flyback transformers in B/W and ... core, ferrite rod cores, soft ferrite core, high permeability ferrite cores, aetd ferrite core, n87 ferrite core, ef20 ferrite core, round ferrite core, L shape ferrite core ...