The RFSL5303 from RF-CI is a RF & Microwave Isolator with Frequency 1.02 to 1.09 GHz, Average Power Forward 100 W, Average Power Reverse 80 W, Peak Power Forward 0.5 kW, Insertion Loss 0.22 to 0.3 dB. Tags: Surface Mount, Surface Mount Isolator. More details for RFSL5303 can be seen below.