The D3-40011 / 40012 from Crane Aerospace & Electronics is a Directional Coupler with Frequency 10 to 500 MHz, Coupling 10 dB, Coupling Variation ±0.25 dB, Directivity 25 dB, Average Power 3 W. Tags: Module with Connectors. More details for D3-40011 / 40012 can be seen below.