The T-12S43U-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 0.5 dB, Isolation 18 dB. Tags: Module with Connector, Coaxial Isolator. More details for T-12S43U-30 can be seen below.