The F9-M3643C01 from QUEST Microwave is a RF & Microwave Circulator with Frequency 4.3 GHz, Average Power Forward 5 W, Average Power Reverse 1 W, Insertion Loss 0.5 dB, Isolation 18 dB. Tags: Drop-in Circulator. More details for F9-M3643C01 can be seen below.