The UIYSC9B49T59 from UIY Inc. is a RF & Microwave Circulator with Frequency 4.9 to 5.9 GHz, Average Power Forward 30 W, Average Power Reverse 30 W, Insertion Loss 0.5 dB, Isolation 18 dB. Tags: Surface Mount Circulator. More details for UIYSC9B49T59 can be seen below.