The RFXF3593 from MiniRF is a Balun with Frequency 0.5 to 550 MHz, Amplitude Balance ± 0.2 to 1 dB, Phase Balance 2 to 5 Degree, Insertion Loss Less than 1.5 dB, Power 2 W. Tags: Surface Mount, Unbalanced to Balanced. More details for RFXF3593 can be seen below.