The 4901.19.A from HUBER+SUHNER is a Power Divider with Frequency DC to 12.4 GHz, Insertion Loss 6 dB, Isolation 6 dB, Input Power 0.5 W, Amplitude Balance 0.15 to 0.5 dB. Tags: Module with Connectors, Resistive Power Divider. More details for 4901.19.A can be seen below.