The HSCU0400 from Star Microwave is a RF & Microwave Circulator with Frequency 2.5 to 5.5 GHz, Average Power Forward 50 W, Insertion Loss 0.5 dB, Isolation 18 dB, Operating Temperature -10 to 70 Degree C. Tags: Coaxial Circulator. More details for HSCU0400 can be seen below.