The JCD4400T5200S2 from JQL Electronics is a RF & Microwave Circulator with Frequency 4.4 to 5.2 GHz, Average Power Forward 25 W, Insertion Loss 0.5 dB, Isolation 20 dB, Operating Temperature -40 to 85 Degree C. Tags: Drop-in Circulator. More details for JCD4400T5200S2 can be seen below.