The CBF-11A-1250 from Crane Aerospace & Electronics is a Directional Coupler with Frequency 100 to 2000 MHz, Coupling 11 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.5 dB, Directivity 18 to 20 dB. Tags: Flat Pack. More details for CBF-11A-1250 can be seen below.