The CSDZ-20H-2.1G SQ from Crane Aerospace & Electronics is a Space Qualified Coupler with Frequency 2 to 2.3 GHz, Frequency Sensitivity ±0.1 dB, Coupling 20 dB, Coupling Variation ±0.5 dB, Power 200 W. Tags: Surface Mount. More details for CSDZ-20H-2.1G SQ can be seen below.