The I321(Y)T-(Z) - Isolator from Sinclair Technologies is a RF & Microwave Isolator with Frequency 406 to 512 MHz, Bandwidth 12 MHz, Average Power 125 W, Insertion Loss 0.6 to 0.9 dB, Isolation 50 to 75 dB. Tags: Module with Connectors, Coaxial Isolator. More details for I321(Y)T-(Z) - Isolator can be seen below.