The B0430J50100AHF from TTM Technologies is a Balun with Frequency 400 MHz to 3 GHz, Amplitude Balance ±0.7 to 1.4 dB, Phase Balance 7 to 12 Degree, Insertion Loss 1.7 to 4 dB, Power 0.4 W. Tags: Surface Mount, Unbalanced to Balanced. More details for B0430J50100AHF can be seen below.