The JIC0350T0400S10 from JQL Electronics is a RF & Microwave Isolator with Frequency 350 to 400 MHz, Average Power Forward 250 W, Average Power Reverse 50 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Module with Connector, Coaxial Isolator. More details for JIC0350T0400S10 can be seen below.