The ISCU0300 from Star Microwave is a RF & Microwave Circulator with Frequency 2 to 4 GHz, Average Power Forward 50 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -10 to 75 Degree C. Tags: Coaxial Circulator. More details for ISCU0300 can be seen below.