The HD32954 from HD Communications Corp is a RF & Microwave Circulator with Frequency 0.617 to 0.894 GHz, Average Power 600 to 1000 W, Insertion Loss 0.5 dB, Isolation 17 dB, Operating Temperature -30 to 85 Degree C. Tags: Coaxial Circulator. More details for HD32954 can be seen below.