The UIYCI4550A from UIY Inc. is a RF & Microwave Isolator with Frequency 250 MHz to 1.5 GHz, Average Power Forward 100 to 400 W, Average Power Reverse 30 W, Insertion Loss 0.25 to 0.6 dB, Isolation 16 to 25 dB. Tags: Module with Connector, Coaxial Isolator. More details for UIYCI4550A can be seen below.