The BD0810N50100AHF from TTM Technologies is a Balun with Frequency 800 MHz to 1 GHz, Amplitude Balance ±1 to 1.4 dB, Phase Balance 5 to 9 Degree, Insertion Loss 1 to 1.2 dB, Power 0.75 W. Tags: Surface Mount, Unbalanced to Balanced. More details for BD0810N50100AHF can be seen below.