SMA Female To TNC Female Adapter

SMA Female To TNC Female Adapter

SMA connectors are coaxial RF connectors developed in the 1960s as a minimal connector interface for coaxial cable with a screw type coupling mechanism. The connector has a 50 Ω impedance. It offers excellent electrical performance from DC to 18 GHz.The SMA connector consists of a 0.250x36 thread. The male is equipped with a .312 inch hex nut. It is important that the nut be properly torqued with a 5/16 inch wrench, 3-5 in·lbf (0.3 to 0.6 N·m) for brass, and 7-10 in·lbf (0.8–1.1 N·m) for stainless steel connectors. When turning the nut, it is very important that the remainder of the connector does not rotate, otherwise premature wear of the connector will result. Furthermore, the connector should be carefully inspected before each use, and any debris cleaned with compressed air. When properly handled, a SMA connector should remain within specified performance through 500 mating cycles.

The SMA connector uses a polytetrafluoroethylene (PTFE) dielectric which will contact along the mating plane. Variablilty in the construction and the mating of the connectors limit the repeatability of the connector impedance. For that reason, a SMA connector is not a good choice for metrology applications.

The outer shell of the male or plug connector has an inside thread and an inner pin, which can be confusing. In conventional SMA, the terms male and female refer exclusively to the inner pin or socket of the connectors. The male connector is also commonly referred to as a plug, whereas the female connector is also known as a socket or jack.