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EFD25 Main Power Transformer SMD Bobbin Coil FormerEFD25 horizontal bobbin, 6+6 pins SMD coil former. Phenolic material EFD25 transformer bobbin. Pin Pitch=3.75mm. Parallel distance=26mm. Size=31.5mmX25.0mmX12.6mm. We produce various series high frequency transformers for power supplies.