The JCD3300T3700S2 from JQL Electronics is a RF & Microwave Circulator with Frequency 3.3 to 3.7 GHz, Average Power Forward 25 W, Insertion Loss 0.45 dB, Isolation 22 dB, Operating Temperature -40 to 85 Degree C. Tags: Drop-in Circulator. More details for JCD3300T3700S2 can be seen below.