The C2537/S*A from Smiths Interconnect is a RF & Microwave Circulator with Frequency 2.5 to 3.7 GHz, Average Power Forward 75 W, Peak Power 100 W, Insertion Loss 0.6 dB, Isolation 20 dB. Tags: Drop-in Circulator. More details for C2537/S*A can be seen below.