The HL8444 from HYPERLABS is a Bias Tee with Frequency 50 kHz to 40 GHz, Max. Voltage 11 to 30 V (Breakdown), Max Current 0.175 A, Insertion Loss 1.75 dB, Return Loss 10 to 15 dB. Tags: Module with Connector, Kelvin. More details for HL8444 can be seen below.