The UIYDC1919A from UIY Inc. is a RF & Microwave Circulator with Frequency 80 MHz to 4.2 GHz, Average Power Forward 100 W, Average Power Reverse 100 W, Insertion Loss 0.3 dB, Isolation 23 dB. Tags: Drop-in Circulator. More details for UIYDC1919A can be seen below.