The T-1S83U-10 from Teledyne Microwave Solutions is a RF & Microwave Isolator with Frequency 1.7 to 4.2 GHz, Average Power Forward 50 W, Average Power Reverse 2 W, Insertion Loss 0.7 dB, Isolation 16 dB. Tags: Module with Connector, Coaxial Isolator. More details for T-1S83U-10 can be seen below.