The T5258/DB from Smiths Interconnect is a RF & Microwave Isolator with Frequency 5.2 to 5.8 GHz, Average Power Forward 5 W, Average Power Reverse 1 W, Peak Power Forward 0.02 kW, Insertion Loss 1 dB. Tags: Microstrip, Microstrip Isolator. More details for T5258/DB can be seen below.