The T-12S44U-30 from Teledyne Microwave Solutions is a RF & Microwave Isolator with Frequency 12 to 18 GHz, Average Power Forward 50 W, Average Power Reverse 2 W, Insertion Loss 1.2 dB, Isolation 35 dB. Tags: Module with Connector, Coaxial Isolator. More details for T-12S44U-30 can be seen below.