The AT11B-040080K-AF from Aaren Technology Ltd is a RF & Microwave Circulator with Frequency 4 to 8 GHz, Average Power Forward 50 W, Insertion Loss 0.6 dB, Isolation 18 dB, Operating Temperature 0 to 60 Degree C. Tags: Coaxial Circulator. More details for AT11B-040080K-AF can be seen below.