The TCM3-452X+ from Mini Circuits is a Balun with Frequency 20 MHz to 4.5 GHz, Phase Balance 0.07 to 9.03 Degree, Insertion Loss 1.30 to 1.67 dB, Current 30 mA, Power 0.4 W. Tags: Surface Mount, Balanced to Balanced. More details for TCM3-452X+ can be seen below.