The KCI177521 from Konnect RF is a RF & Microwave Circulator with Frequency 0.35 to 0.5 GHz, Average Power Forward 50 W, Insertion Loss 0.5 dB, Isolation 18 dB, Operating Temperature -30 to 55 Degree C. Tags: Drop-in Circulator. More details for KCI177521 can be seen below.