The DC20-040200SF from Corech Microwave is a Directional Coupler with Frequency 4 to 20 GHz, Coupling 20 dB, Coupling Variation ±1 dB (Balance), Directivity 12 to 15 dB, Average Power 30 W (CW). Tags: Module with Connectors. More details for DC20-040200SF can be seen below.