The COIU3U40325GH-XX from Cernex Inc is a RF & Microwave Isolator with Frequency 300 to 400 MHz, Bandwidth 30 MHz, Average Power Forward 100 W, Insertion Loss 0.3 dB, Isolation 25 dB. Tags: Module with Connector, Coaxial Isolator. More details for COIU3U40325GH-XX can be seen below.