The UIYDI1919A from UIY Inc. is a RF & Microwave Isolator with Frequency 800 MHz to 4.2 GHz, Average Power Forward 100 W, Average Power Reverse 30 W, Insertion Loss 0.3 to 0.4 dB, Isolation 18 to 23 dB. Tags: Drop-In, Drop-In Isolator. More details for UIYDI1919A can be seen below.