The DC0405J5010AHF from TTM Technologies is a Directional Coupler with Frequency 400 to 500 MHz, Coupling 9.9 to 11.1 dB, Coupling Variation ±0.6 dB, Frequency Sensitivity ±0.8 to ±0.9 dB, Directivity 18 to 20 dB. Tags: Surface Mount. More details for DC0405J5010AHF can be seen below.