The DNF1900-T0315 from Mercury Systems is a RF & Microwave Isolator with Frequency 3.6 to 4.2 GHz, Average Power 10 W, Average Power Forward 10 W, Peak Power Forward 100 W, Insertion Loss 0.4 dB max.. Tags: Drop-In, Drop-In Isolator. More details for DNF1900-T0315 can be seen below.