The 3A412 from TTM Technologies is a Balun with Frequency 800 MHz to 1 GHz, Amplitude Balance ± 0.4 dB, Phase Balance 5 Degree, Insertion Loss 0.35 to 0.48 dB, Power 250 W. Tags: Surface Mount, Balanced to Unbalanced. More details for 3A412 can be seen below.