The C-5S03U-20 from Teledyne Microwave Solutions is a RF & Microwave Circulator with Frequency 5.4 to 5.9 GHz, Average Power Forward 50 W, Peak Power 1 kW, Insertion Loss 0.3 dB, Isolation 26 dB. Tags: Coaxial Circulator. More details for C-5S03U-20 can be seen below.