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EFD30 Bobbin For Amplifier TransformerEFD30 power transformer frame. EFD30 DIP bobbin 5+7 pins horizontal bobbin. EFD30 MnZn magnetic ferrite cores. Row distance=35.0mm. Pin pitch=5.04mm. EFD30 high voltage transformers widely used in electrical equipments, medical equipments, communication equipments, power supplies, vehicle electronic equipments.