The RFSL5258 from RF-CI is a RF & Microwave Isolator with Frequency 830 to 890 MHz, Average Power Forward 100 W, Average Power Reverse 20 W, Peak Power Forward 0.5 kW, Insertion Loss 0.35 to 0.4 dB. Tags: Surface Mount, Surface Mount Isolator. More details for RFSL5258 can be seen below.