The FMCR1004 from Fairview Microwave is a RF & Microwave Circulator with Frequency 2 to 4 GHz, Average Power Forward 50 W, Average Power Reverse 50 W, Peak Power 100 W, Insertion Loss 0.6 dB. Tags: Coaxial Circulator. More details for FMCR1004 can be seen below.