The RC2528CS-030040 from ZTS Technologies is a RF & Microwave Circulator with Frequency 3 to 4 GHz, Average Power Forward 100 W, Insertion Loss 0.5 dB, Isolation 20 dB, Operating Temperature -10 to 60 Degree C. Tags: Module with Connectors, Coaxial Circulator. More details for RC2528CS-030040 can be seen below.