The C3038/S*A from Smiths Interconnect is a RF & Microwave Circulator with Frequency 3 to 3.8 GHz, Average Power Forward 125 W, Peak Power 500 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Coaxial Circulator. More details for C3038/S*A can be seen below.