The ZCDC30-5R263-S+ from Mini Circuits is a Directional Coupler with Frequency 0.5 to 26.5 GHz, Coupling 30 dB, Coupling Variation ±2.3 dB, Directivity 13 to 31 dB, Average Power 20 W. Tags: Module with Connectors. More details for ZCDC30-5R263-S+ can be seen below.