The JIC3500T4500FS0 from JQL Electronics is a RF & Microwave Isolator with Frequency 3.5 to 4.5 GHz, Average Power Forward 10 W, Average Power Reverse 1 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Module with Connector, Coaxial Isolator. More details for JIC3500T4500FS0 can be seen below.