The UIYBDI5377A from UIY Inc. is a RF & Microwave Isolator with Frequency 225 to 400 MHz, Average Power Forward 120 W, Average Power Reverse 80 W, Insertion Loss 0.8 to 1.2 dB, Isolation 14 to 18 dB. Tags: Drop-In, Drop-In Isolator. More details for UIYBDI5377A can be seen below.