The I3113W-3 - Isolator from Sinclair Technologies is a RF & Microwave Isolator with Frequency 405 to 440 MHz, Bandwidth 35 MHz, Average Power 125 W, Average Power Reverse 60 W, Insertion Loss 0.4 dB. Tags: Module with Connectors, Coaxial Isolator. More details for I3113W-3 - Isolator can be seen below.