The T4YN1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4.4 to 5.8 GHz, Average Power 20 W, Average Power Forward 20 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for T4YN1 can be seen below.