The C-8S44U-20 from Teledyne Microwave Solutions is a RF & Microwave Circulator with Frequency 8.0 to 12.4 GHz, Average Power Forward 50 W, Peak Power 1000 W, Insertion Loss 1 dB, Isolation 35 dB. Tags: Coaxial Circulator. More details for C-8S44U-20 can be seen below.