The RFCR2871 from RF-CI is a RF & Microwave Circulator with Frequency 3.6 to 3.8 GHz, Average Power Forward 50 W, Average Power Reverse 50 W, Peak Power 500 W, Insertion Loss 0.25 to 0.35 dB. Tags: Drop-in Circulator. More details for RFCR2871 can be seen below.