The BD2425J50200AHF from Anaren Inc is a Balun with Frequency 2.4 to 2.5 GHz, Amplitude Balance ± 0.5 dB, Phase Balance 6 Degree, Insertion Loss 0.8 dB, Power 2 W. Tags: Surface Mount, Unbalanced to Balanced. More details for BD2425J50200AHF can be seen below.