The I311(X)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 0.3 to 0.6 dB, Isolation 25 to 35 dB. Tags: Module with Connectors, Coaxial Isolator. More details for I311(X)T-(Z) - Isolator can be seen below.
