The BD0826J50200AHF from TTM Technologies is a Balun with Frequency 800 MHz to 2.8 GHz, Amplitude Balance ±0.4 to 1.3 dB, Phase Balance 3 to 8 Degree, Insertion Loss 1.2 to 1.6 dB, Power 2 W. Tags: Surface Mount, Balanced to Unbalanced. More details for BD0826J50200AHF can be seen below.