SMA Jacks & Plugs Amphenol SV Microwave SMA Jacks and Plugs are part of Amphenol SV Microwave's precision, high performance RF and Microwave Connector Series. Designed using low reflection stainless steel construction with ¼ - 36 threaded coupling, the SMA Jacks and Plugs are rated at 50Ω impedance and offer excellent electrical performance from DC to 18GHz. The compact size and outstanding mechanically durability make the SMA Jacks and Plugs well-suited for military, satellite, aerospace, industrial, and telecommunication applications.