The TC4-1TG2+ from Mini Circuits is a Balun with Frequency 0.5 to 300 MHz, Insertion Loss 0.27 to 0.62 dB, Current 30 mA, Power 0.25 W, Return Loss 14.29 to 32.32 dB. Tags: Surface Mount, Unbalanced to Balanced. More details for TC4-1TG2+ can be seen below.