The UIYDDC3928A from UIY Inc. is a RF & Microwave Circulator with Frequency 3.5 to 7 GHz, Average Power Forward 60 W, Average Power Reverse 60 W, Insertion Loss 0.6 dB, Isolation 45 dB. Tags: Drop-in Circulator. More details for UIYDDC3928A can be seen below.