The JCD1900T2030S6 from JQL Electronics is a RF & Microwave Circulator with Frequency 1.9 to 2.03 GHz, Average Power Forward 60 W, Insertion Loss 0.3 dB, Isolation 23 dB, Operating Temperature -30 to 70 Degree C. Tags: Drop-in Circulator. More details for JCD1900T2030S6 can be seen below.