The RC4549XS-600-900 from ZTS Technologies is a RF & Microwave Circulator with Frequency 600 to 900 MHz, Average Power Forward 100 W, Insertion Loss 0.8 dB, Isolation 15 dB, Operating Temperature -30 to 75 Degree C. Tags: Module with Connectors, Coaxial Circulator. More details for RC4549XS-600-900 can be seen below.