The HSCU0450 from Star Microwave is a RF & Microwave Circulator with Frequency 3 to 6 GHz, Average Power Forward 50 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -20 to 75 Degree C. Tags: Coaxial Circulator. More details for HSCU0450 can be seen below.