The HYB-5309-03-TNC-79 from Cinch Connectivity Solutions is a 90 Degree Hybrid Coupler with Frequency 250 to 500 MHz, Average Power 50 W, Insertion Loss 0.3 dB, Isolation 20 dB, Coupling 3 dB. Tags: Module with Connectors. More details for HYB-5309-03-TNC-79 can be seen below.