The RFXF5743 from MiniRF is a Balun with Frequency 5 MHz to 1.2 GHz, Amplitude Balance ± 0.3 to 1.5 dB, Phase Balance 1 to 15 Degree, Insertion Loss Less than 2 dB, Power 2 W. Tags: Surface Mount, Unbalanced to Balanced. More details for RFXF5743 can be seen below.