The UIYBDC4040A from UIY Inc. is a RF & Microwave Circulator with Frequency 170 MHz to 3.5 GHz, Average Power Forward 200 W, Average Power Reverse 200 W, Insertion Loss 0.7 dB, Isolation 17 dB. Tags: Drop-in Circulator. More details for UIYBDC4040A can be seen below.