The UIYBCI3538B from UIY Inc. is a RF & Microwave Isolator with Frequency 400 to 470 MHz, Average Power Forward 100 to 300 W, Average Power Reverse 30 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Module with Connector, Coaxial Isolator. More details for UIYBCI3538B can be seen below.