3858-X

      3858 is a 1:1 line matching transformer which has five unique features: The first one is it has low profile. The second one is that it has small volume. The third one is its conforming to FCC part 68, canadian CS 03 regulations. The forth one is it has low cost. The fifth one is it has high insulation voltage. Otherwise , it also has three main applications. The first one is those interfacing equipment to telephone line. The second one is those requiring small size and high insulation voltage. The third one is 3858-2 is designed for high impedance bridging applications.
      Then, there are also some electrical specification (@25 °C) about it.  Impedance ( ) is 600 : 600 (3858), 600 : 600(3858-1), 10 K : 10 K(3858-2) ,10 K : 10 K(3858-3). Insertion Loss ( dB ) (@ 1000 Hz) is less than 1.0 (3858), less than 1.0 (3858-1), less than 0.5(3858-2), less than 0.5(3858-3). Frequency Response ( dB ) (300 3500 Hz) is  less than 1.0 (3858), less than 1.0 (3858-1), less than 0.5(3858-2), less than 0.7(3858-3). Longitudinal Balance ( dB ) (300 3500 Hz) is bigger than 65(3858), bigger than 65(3858-1),bigger than 65(3858-2),bigger than 65(3858-3).  Dielectric Strength (V_^rms) is 4000 V_^rms (3858), 4000 V_^rms (3858-1) , 2500 V_^rms (3858-2), 2500 V_^rms (3858-3).
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