The T5YK1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 5.8 to 6.4 GHz, Average Power 1 to 8 W, Average Power Forward 1 to 8 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Microstrip, Microstrip Isolator. More details for T5YK1 can be seen below.