The DC20-020040SF from Corech Microwave is a Directional Coupler with Frequency 2 to 4 GHz, Coupling 20 dB, Coupling Variation ±0.25 dB (Balance), Directivity 22 dB, Average Power 50 W (CW). Tags: Module with Connectors. More details for DC20-020040SF can be seen below.