The D3I0555 from DiTom Microwave is a RF & Microwave Isolator with Frequency 500 to 550 MHz, Average Power 300 W, Average Power Forward 300 W, Average Power Reverse 2 W, Peak Power Forward 0.75 kW. Tags: Module with Connector, Coaxial Isolator. More details for D3I0555 can be seen below.