The C-4S73U-10 from Teledyne Microwave Solutions is a RF & Microwave Circulator with Frequency 4.4 to 10.0 GHz, Average Power Forward 50 W, Peak Power 1000 W, Insertion Loss 0.7 dB, Isolation 16 dB. Tags: Coaxial Circulator. More details for C-4S73U-10 can be seen below.