The DC2225M3550B20C50PS-01 from Dyne Tech is a Directional Coupler with Frequency 450 MHz to 4 GHz, Coupling 20 dB, Coupling Variation ±2 dB, Directivity 18 dB, Average Power 50 W. Tags: Module with Connectors. More details for DC2225M3550B20C50PS-01 can be seen below.