The SMF950-F0300 from Mercury Systems is a RF & Microwave Circulator with Frequency 3.7 to 4.3 GHz, Average Power Forward 5 W, Average Power Reverse 0.5 W, Peak Power 50 W, Insertion Loss 0.5 dB. Tags: Drop-in Circulator. More details for SMF950-F0300 can be seen below.