The RFCR5842D from RF-CI is a RF & Microwave Circulator with Frequency 3.6 to 4.2 GHz, Average Power Forward 30 W, Average Power Reverse 30 W, Peak Power Forward 500 W, Insertion Loss 0.35 to 0.4 dB. Tags: Surface Mount, Surface Mount Circulator. More details for RFCR5842D can be seen below.