The TXA4-512HP+ from Mini Circuits is a Balun with Frequency 30 to 512 MHz, Amplitude Balance ± 0.03 to 0.21 dB, Phase Balance 0.01 to 1.95 Degree, Insertion Loss 0.49 to 1.12 dB, Current 30 mA. Tags: Surface Mount, Balanced to Balanced. More details for TXA4-512HP+ can be seen below.