The CTC017019AN from 3Rwave is a RF & Microwave Circulator with Frequency 179 to 199 MHz, Average Power Forward 300 W, Insertion Loss 0.5 to 0.6 dB, Isolation 18 to 22 dB, Return Loss 18 to 22 dB. Tags: Drop-in Circulator. More details for CTC017019AN can be seen below.