The DC30-044051SF from Corech Microwave is a Directional Coupler with Frequency 4.4 to 5.15 GHz, Coupling 30 dB, Coupling Variation ±1 dB (Balance), Directivity 18 dB, Average Power 30 W (CW). Tags: Module with Connectors. More details for DC30-044051SF can be seen below.