The ADC021ED from ADMOTECH is a RF & Microwave Circulator with Frequency 190 to 225 MHz, Average Power Forward 150 W, Average Power Reverse 100 W, Insertion Loss 0.4 to 0.6 dB, Isolation 16 to 18 dB. Tags: Drop-in Circulator. More details for ADC021ED can be seen below.