The UIYDDI4027A from UIY Inc. is a RF & Microwave Isolator with Frequency 800 MHz to 3.5 GHz, Average Power Forward 100 W, Average Power Reverse 100 W, Insertion Loss 0.5 dB, Isolation 50 dB. Tags: Drop-In, Drop-In Isolator. More details for UIYDDI4027A can be seen below.