The DC20-020040SFC from Corech Microwave is a Directional Coupler with Frequency 2 to 4 GHz, Coupling 20 dB, Coupling Variation ±1.25 dB (Balance), Directivity 22 to 25 dB, Average Power 50 W (CW). Tags: Module with Connectors. More details for DC20-020040SFC can be seen below.