The UIYBCI5377A from UIY Inc. is a RF & Microwave Isolator with Frequency 225 to 400 MHz, Average Power Forward 100 to 120 W, Average Power Reverse 80 W, Insertion Loss 0.8 to 1.2 dB, Isolation 14 to 18 dB. Tags: Module with Connector, Coaxial Isolator. More details for UIYBCI5377A can be seen below.