The ZDDC30S-020040A from ZTS Technologies is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±1.2 dB, Frequency 2 to 4 GHz, Average Power 30 W, Insertion Loss 0.4 dB. Tags: Module with Connectors. More details for ZDDC30S-020040A can be seen below.