The QDI3234A from Qualwave is a RF & Microwave Isolator with Frequency 2000 to 4000 MHz, Bandwidth 2000 MHz, Average Power Forward 100 W, Average Power Reverse 10 to 100 W, Insertion Loss 0.60 dB. Tags: Drop-In, Drop-In Isolator. More details for QDI3234A can be seen below.