The DBCL1903000500A from Qotana is a RF & Microwave Circulator with Frequency 3 to 5 GHz, Average Power Forward 10 W, Average Power Reverse 10 W, Insertion Loss 0.50 to 0.60 dB, Isolation 18 to 19 dB. Tags: Coaxial Circulator. More details for DBCL1903000500A can be seen below.