The TC4-19LN+ from Mini Circuits is a Balun with Frequency 10 MHz to 1.9 GHz, Amplitude Balance ± 0.01 to 1.95 dB, Phase Balance 0.01 to 1.95 dB, Insertion Loss 0.99 to 2.99 dB, Current 150 mA. Tags: Surface Mount, Balanced to Balanced. More details for TC4-19LN+ can be seen below.