Are all SMA connectors 50 ohms?

RF connectors of the SMA (SubMiniature version A) kind are commonly utilized in microwave applications. They are frequently used for frequencies up to 18 GHz and have a distinctive screw-type coupling mechanism. Small-sized SMA connectors are frequently seen in wireless communication and microwave devices.

According to IEC60169-15 standard, The SMA connectors are designed for 50 ohms systems. SMA connectors are typically used in RF and microwave applications, and a 50 ohms impedance is the standard for these types of systems because 50 ohms balance the best power handling and signal loss. The SMA Connector widely assembly with RG series, LMR series 50 ohms coaxial cables.

Type N, BNC, TNC,MCX,F Connectors have 75 ohms version which usually utilized for broadcast industry.