The BD0810J50150AHF from TTM Technologies is a Balun with Frequency 800 MHz to 1 GHz, Amplitude Balance ±0.2 to 0.6 dB, Phase Balance 2.5 to 6 Degree, Insertion Loss 0.9 to 1.1 dB, Power 2 W. Tags: Surface Mount, Balanced to Unbalanced. More details for BD0810J50150AHF can be seen below.