The CIDU2U20518G-XX from Cernex Inc is a RF & Microwave Isolator with Frequency 200 to 250 MHz, Bandwidth 20 MHz, Average Power Forward 100 W, Insertion Loss 0.5 dB, Isolation 18 dB. Tags: Drop-In, Drop-In Isolator. More details for CIDU2U20518G-XX can be seen below.