The 890-180188-501 from M2 Global Technology is a RF & Microwave Circulator with Frequency 1.8 to 1.88 GHz, Average Power Forward 200 W, Insertion Loss 0.28 dB, Operating Temperature -20 to 70 Degree C. Tags: Drop-in Circulator. More details for 890-180188-501 can be seen below.