The JIC0313T0317N5 from JQL Electronics is a RF & Microwave Isolator with Frequency 313 to 317 MHz, Average Power Forward 100 W, Average Power Reverse 10 W, Insertion Loss 0.25 dB, Isolation 25 dB. Tags: Module with Connector, Coaxial Isolator. More details for JIC0313T0317N5 can be seen below.