The DCF1900-T0330 from Mercury Systems is a RF & Microwave Isolator with Frequency 3.6 to 4.3 GHz, Average Power 10 W, Average Power Forward 35 W, Average Power Reverse 2 W, Peak Power Forward 100 W. Tags: Drop-In, Drop-In Isolator. More details for DCF1900-T0330 can be seen below.