The CSDZ-20H-1.9G SQ from Crane Aerospace & Electronics is a Space Qualified Coupler with Frequency 1.7 to 2 GHz, Frequency Sensitivity ±0.15 dB, Coupling 20 dB, Coupling Variation ±0.5 dB, Power 200 W. Tags: Surface Mount. More details for CSDZ-20H-1.9G SQ can be seen below.