TF048 Telecom Line Isolation Transformer by OEP. Package: through hole Impedance matching: 600 ohms to 600 ohms (200Hz - 4kHz) Download OEP TF048 datasheet: Status: NOS (New Old Stock) ex RS Components, still boxed. Original British made items not the recent Chinese imported versions. RS Components stock code: 210-6267 RoHS compliant: tbc