The RFCR2851S from RF-CI is a RF & Microwave Circulator with Frequency 2.47 to 2.73 GHz, Average Power Forward 80 W, Average Power Reverse 100 W, Peak Power 500 W, Insertion Loss 0.25 to 0.3 dB. Tags: Surface Mount Circulator. More details for RFCR2851S can be seen below.