The D3C0120 from DiTom Microwave is a RF & Microwave Circulator with Frequency 1.7 to 2.0 GHz, Average Power Forward 150 W, Peak Power 750 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Coaxial Circulator. More details for D3C0120 can be seen below.