RPSMA

RPSMA stands for Reverse Polarity SMA. It is a variation of the standard SMA (SubMiniature version A) connector used for radio frequency (RF) applications. The key difference lies in the pin and socket arrangement. In a standard SMA connector, the male connector has a central pin and the female connector has a central socket. In an RPSMA connector, this is reversed. The male RPSMA connector has a central socket, and the female RPSMA connector has a central pin.

This reversal of polarity is a deliberate design choice primarily to prevent accidental interconnections between standard SMA and RPSMA connectors. Forcing a standard SMA cable into an RPSMA connector, or vice-versa, can cause damage to both connectors and potentially to the connected equipment. The RPSMA design is often implemented in wireless networking equipment, such as Wi-Fi routers and antennas, where it serves as a deterrent against users connecting incompatible antennas or accessories.

RPSMA connectors maintain the same overall dimensions and electrical characteristics as standard SMA connectors, meaning they operate at similar frequencies and have comparable signal integrity. However, due to the reversed polarity, they are not interchangeable with standard SMA connectors. When purchasing RF cables or antennas, it is crucial to ensure that the connector type matches the existing equipment to avoid compatibility issues and potential damage.