The C-4S13U-10 from Teledyne Microwave Solutions is a RF & Microwave Circulator with Frequency 4.4 to 5 GHz, Average Power Forward 50 W, Peak Power 1000 W, Insertion Loss 0.3 dB, Isolation 21 dB. Tags: Coaxial Circulator. More details for C-4S13U-10 can be seen below.