The T5459/DF from Smiths Interconnect is a RF & Microwave Isolator with Frequency 5.4 to 5.9 GHz, Average Power Forward 20 W, Average Power Reverse 0.5 W, Peak Power Forward 0.05 kW, Insertion Loss 0.4 dB. Tags: Drop-In, Drop-In Isolator. More details for T5459/DF can be seen below.