The DC30-020040SF from Corech Microwave is a Directional Coupler with Frequency 2 to 4 GHz, Coupling 30 dB, Coupling Variation ±1.25 dB (Balance), Directivity 22 to 24 dB, Average Power 50 W (CW). Tags: Module with Connectors. More details for DC30-020040SF can be seen below.