The DC20-003005SF from Corech Microwave is a Directional Coupler with Frequency 0.3 to 0.5 GHz, Coupling 20 dB, Coupling Variation ±1 dB (Balance), Directivity 20 dB, Average Power 20 W (CW). Tags: Module with Connectors. More details for DC20-003005SF can be seen below.