The UIYDI4242A from UIY Inc. is a RF & Microwave Isolator with Frequency 250 MHz to 1.5 GHz, Bandwidth 187.5 MHz, Average Power Forward 300 W, Average Power Reverse 30 W, Insertion Loss 0.25 dB. Tags: Drop-In, Drop-In Isolator. More details for UIYDI4242A can be seen below.