The JIC0405T0440N6 from JQL Electronics is a RF & Microwave Isolator with Frequency 405 to 440 MHz, Average Power Forward 125 W, Average Power Reverse 60 W, Insertion Loss 0.3 dB, Isolation 25 dB. Tags: Module with Connector, Coaxial Isolator. More details for JIC0405T0440N6 can be seen below.