The T3YH5 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 3.6 to 4.2 GHz, Average Power 2 W, Average Power Forward 2 W, Insertion Loss 0.5 dB, Isolation 23 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T3YH5 can be seen below.