The JCD5900T6400G1 from JQL Electronics is a RF & Microwave Circulator with Frequency 5.9 to 6.4 GHz, Average Power Forward 10 W, Insertion Loss 0.5 dB, Isolation 20 dB, Operating Temperature -40 to 75 Degree C. Tags: Drop-in Circulator. More details for JCD5900T6400G1 can be seen below.