The MDC6226-18 from Preferred Power Products (P3) is a Dual Directional Coupler with Coupling 18 dB, Coupling Variation ±1.25 dB, Frequency 4 to 8 GHz, Peak Power 3 kW, Average Power 50 W. Tags: Module with Connectors. More details for MDC6226-18 can be seen below.