The JIC0390T0450N15 from JQL Electronics is a RF & Microwave Isolator with Frequency 390 to 450 MHz, Average Power Forward 300 W, Average Power Reverse 150 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Module with Connector, Coaxial Isolator. More details for JIC0390T0450N15 can be seen below.