The HD32980 from HD Communications Corp is a RF & Microwave Circulator with Frequency 0.37 to 0.5 GHz, Average Power 200 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -30 to 70 Degree C. Tags: TAB, Drop-in Circulator. More details for HD32980 can be seen below.