The QSI12R5 from Qualwave is a RF & Microwave Isolator with Frequency 800 to 6000 MHz, Bandwidth 600 MHz, Average Power Forward 50 W, Average Power Reverse 5 to 10 W, Insertion Loss 0.3 to 0.6 dB. Tags: Surface Mount, Surface Mount Isolator. More details for QSI12R5 can be seen below.