The RFSL5311 from RF-CI is a RF & Microwave Isolator with Frequency 1.2 to 1.4 GHz, Average Power Forward 100 W, Average Power Reverse 80 W, Peak Power Forward 0.5 kW, Insertion Loss 0.25 to 0.35 dB. Tags: Surface Mount, Surface Mount Isolator. More details for RFSL5311 can be seen below.