The RFCR6952 from RF-CI is a RF & Microwave Circulator with Frequency 4.2 to 5.2 GHz, Average Power Forward 50 W, Average Power Reverse 50 W, Peak Power 500 W, Insertion Loss 0.30 to 0.40 dB. Tags: Coaxial Circulator. More details for RFCR6952 can be seen below.