The CSC-30-4.2G SQ from Crane Aerospace & Electronics is a Space Qualified Coupler with Frequency 3.9 to 4.5 GHz, Frequency Sensitivity ±0.2 dB, Coupling 30 dB, Coupling Variation ±1 dB, Power 60 W. Tags: Module with Connectors. More details for CSC-30-4.2G SQ can be seen below.