The ZDDC30S-0.5-1-20A from ZTS Technologies is a Directional Coupler with Frequency 500 MHz to 1 GHz, Coupling 10 dB, Coupling Variation ±1.25 dB, Directivity 22 dB, Average Power 20 Watts. Tags: Module with Connectors. More details for ZDDC30S-0.5-1-20A can be seen below.