The D4I3783 from DiTom Microwave is a RF & Microwave Isolator with Frequency 3.7 to 8.3 GHz, Average Power 20 W, Average Power Forward 20 W, Average Power Reverse 2 W, Peak Power Forward 0.05 kW. Tags: Module with Connector, Coaxial Isolator. More details for D4I3783 can be seen below.