The RFCR2874 from RF-CI is a RF & Microwave Circulator with Frequency 3.5 to 4.3 GHz, Average Power Forward 50 W, Average Power Reverse 50 W, Peak Power 500 W, Insertion Loss 0.3 to 0.4 dB. Tags: Drop-in Circulator. More details for RFCR2874 can be seen below.