The RFSL8851N from RF-CI is a RF & Microwave Isolator with Frequency 2 to 4 GHz, Average Power Forward 50 W, Average Power Reverse 20 W, Peak Power Forward 0.5 kW, Insertion Loss 0.5 to 0.7 dB. Tags: Module with Connector, Coaxial Isolator. More details for RFSL8851N can be seen below.