The HD33788 from HD Communications Corp is a RF & Microwave Isolator with Frequency 1.5 to 1.8 GHz, Average Power Forward 5 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -30 to 70 Degree C. Tags: Module with Connectors, Coaxial Isolator. More details for HD33788 can be seen below.