The ESC0500 from Star Microwave is a RF & Microwave Circulator with Frequency 4.6 to 5.4 GHz, Average Power Forward 50 W, Insertion Loss 0.3 dB, Isolation 21 dB, Operating Temperature -30 to 85 Degree C. Tags: Coaxial Circulator. More details for ESC0500 can be seen below.