The ZCDC16-5R263-S+ from Mini Circuits is a Directional Coupler with Frequency 0.5 to 26.5 GHz, Coupling 16 dB, Directivity 14.0 to 29 dB, Power 20 W, Average Power 20 W. Tags: Module with Connectors. More details for ZCDC16-5R263-S+ can be seen below.