The T4YT2 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4.3 to 5.1 GHz, Average Power 3 W, Average Power Forward 3 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Microstrip, Microstrip Isolator. More details for T4YT2 can be seen below.