The UIYSI20A from UIY Inc. is a RF & Microwave Isolator with Frequency 800 MHz to 4.2 GHz, Average Power Forward 60 W, Average Power Reverse 10 W, Insertion Loss 0.3 dB, Isolation 23 dB. Tags: Surface Mount, Surface Mount Isolator. More details for UIYSI20A can be seen below.