The C4YU1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4.4 to 5.3 GHz, Average Power 30 W, Average Power Forward 30 W, Insertion Loss 0.5 dB, Isolation 18 dB. Tags: Drop-In, Drop-In Isolator. More details for C4YU1 can be seen below.