The QSC12R5 from Qualwave is a RF & Microwave Circulator with Frequency 800 to 6000 MHz, Bandwidth 600 MHz, Average Power Forward 30 to 100 W, Insertion Loss 0.30 to 0.50 dB, Isolation 18 to 23 dB. Tags: Surface Mount, Surface Mount Circulator. More details for QSC12R5 can be seen below.