The UIYDI3546A from UIY Inc. is a RF & Microwave Isolator with Frequency 250 MHz to 1.875 GHz, Average Power Forward 300 W, Average Power Reverse 100 W, Insertion Loss 0.3 to 0.45 dB, Isolation 18 to 30 dB. Tags: Drop-In, Drop-In Isolator. More details for UIYDI3546A can be seen below.