The L 178 SMCCW from Southern Microwave Inc is a RF & Microwave Circulator with Frequency 1.71 to 1.85 GHz, Average Power Forward 100 W, Average Power Reverse 100 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Surface Mount Circulator. More details for L 178 SMCCW can be seen below.