... ,EF,EE,EPC,ER,PQ,RM,UU,EC,DR 3.Supply grind gap and matched bobbin ferrite core| soft ferrite core| transformer core ... visite our website: www.ougedianzi.com TypeDimensions(mm)Effective ParameterAL±25%n H/N2WeightABCDEFGC1(mm-1)Le (mm)Ae (mm2)Vemm3PC40g ... ±0.23.6±0.31.6248.1929.761433.913107.00EFD25/25/925.7±0.212.8±0.29.2±0.211 ... .5±0.219.2±0.29.8±0.25.2±0.20.9656.5058.603314200016.70EFD30/30/931.8 ...