The TC1-1-43A+ from Mini Circuits is a Balun with Frequency 650 MHz to 4 GHz, Amplitude Balance ± 0.09 to 0.72 dB, Phase Balance 0.32 to 7.04 Degree, Insertion Loss 0.30 to 1.71 dB, Current 30 mA. Tags: Surface Mount, Balanced to Balanced. More details for TC1-1-43A+ can be seen below.