The RFLC101M20M30 from RF-Lambda is a RF & Microwave Circulator with Frequency 200 to 300 MHz, Average Power Forward 30 W, Insertion Loss 0.8 dB, Isolation 18 dB, Operating Temperature -20 to 70 Degree C. Tags: Coaxial Circulator. More details for RFLC101M20M30 can be seen below.