The JCD2850T3550G2 from JQL Electronics is a RF & Microwave Circulator with Frequency 2.85 to 3.55 GHz, Average Power Forward 20 W, Insertion Loss 0.4 dB, Isolation 22 dB, Operating Temperature -15 to 50 Degree C. Tags: Drop-in Circulator. More details for JCD2850T3550G2 can be seen below.