The RFCR2878D from RF-CI is a RF & Microwave Circulator with Frequency 5 to 6.5 GHz, Average Power Forward 35 W, Average Power Reverse 50 W, Peak Power 500 W, Insertion Loss 0.45 to 0.5 dB. Tags: Drop-in Circulator. More details for RFCR2878D can be seen below.