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EFD20 High Frequency SMD Coil Former 5+5 Pins5+5 pins SMD bobbin, EFD20 horizontal coil former, manufacture final transformer. Pin pitch=3.7mm. Bobbin Size=26.4mmX21.4mmX10.7mm. Row distance=19.8mm. EFD20 electronic transformer mainly used in power supply unit, medical equipments, communication equipments, power supplies, vehicle electronic equipments.