The CRF-10A-250 SQ from Crane Aerospace & Electronics is a Directional Coupler with Frequency 5 to 500 MHz, Coupling 10 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.5 dB, Directivity 20 dB. Tags: Flat Pack. More details for CRF-10A-250 SQ can be seen below.