The DNF1900-T0315 from Mercury Systems is a RF & Microwave Circulator with Frequency 3.6 to 4.2 GHz, Bandwidth 601 MHz, Average Power Forward 10 W, Peak Power 100 W, Insertion Loss 0.4 dB. Tags: Drop-in Circulator. More details for DNF1900-T0315 can be seen below.