The SMC-5878 from Sierra Microwave Technology is a RF & Microwave Circulator with Frequency 5.8 to 7.8 GHz, Average Power Reverse 2 to 150 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -20 to 65 Degree C. Tags: Coaxial Circulator. More details for SMC-5878 can be seen below.