The HD33017 from HD Communications Corp is a RF & Microwave Circulator with Frequency 3.3 to 3.8 GHz, Average Power 60 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -40 to 85 Degree C. Tags: TAB, Drop-in Circulator. More details for HD33017 can be seen below.