The UIYCI3556A from UIY Inc. is a RF & Microwave Isolator with Frequency 300 MHz to 1.875 GHz, Average Power Forward 100 to 300 W, Average Power Reverse 100 to 200 W, Insertion Loss 0.3 to 0.8 dB, Isolation 18 to 30 dB. Tags: Module with Connector, Coaxial Isolator. More details for UIYCI3556A can be seen below.