The CSDZ-10Z-2.1G SQ from Crane Aerospace & Electronics is a Space Qualified Coupler with Frequency 2 to 2.3 GHz, Frequency Sensitivity ±0.3 dB, Coupling 10 dB, Coupling Variation ±1 dB, Power 25 W. Tags: Surface Mount. More details for CSDZ-10Z-2.1G SQ can be seen below.