The CSA042044AA from 3Rwave is a RF & Microwave Circulator with Frequency 424 to 444 MHz, Average Power Forward 1000 W, Insertion Loss 0.22 to 0.3 dB, Isolation 20 to 22 dB, Return Loss 20 to 22 dB. Tags: Drop-in Circulator. More details for CSA042044AA can be seen below.