The CQB440500AB from 3Rwave is a RF & Microwave Circulator with Frequency 4.4 to 5 GHz, Average Power Forward 50 W, Insertion Loss 0.3 to 0.35 dB, Isolation 20 to 22 dB, Return Loss 20 to 22 dB. Tags: Surface Mount Circulator. More details for CQB440500AB can be seen below.