RP-SMA Connectors

What are RP-SMA connectors?

RP-SMA connectors (Reverse Polarity SMA) are widely used RF connectors in Wi-Fi, WLAN, IoT and modern wireless devices. Unlike standard SMA connectors, RP-SMA versions feature an inverted pin polarity, introduced to differentiate consumer and wireless products from professional RF systems. They are commonly used in routers, access points, antennas and embedded modules.

Technical characteristics of RP-SMA connectors

RP-SMA connectors offer compact dimensions, solid mechanical strength and compatibility with most wireless equipment. Key features include:

• Threaded coupling ensuring a secure connection on routers and antennas.
• Compatibility with 2.4 GHz and 5 GHz systems used in Wi-Fi, Bluetooth, BLE and IoT applications.
• Male and female versions with reversed polarity for correct device matching.
• Cable and panel-mount versions suitable for indoor and outdoor devices.
• Nickel or gold-plated bodies for enhanced corrosion resistance and signal quality.
• Compatibility with thin coaxial cables such as RG174, RG178, RG316 and 1.13 mm, commonly used in wireless modules.

Where are RP-SMA connectors used?

RP-SMA connectors are among the most common interfaces in wireless devices due to their versatility. They are ideal for:

• Wi-Fi routers and access points with internal or external antennas.
• 2.4/5 GHz Wi-Fi antennas including omni, directional and panel types.
• IoT modules such as ESP32, ESP8266, LoRa, Zigbee, BLE and wireless communication modules.
• Gateways and M2M devices used in remote monitoring.

Available versions

The category includes a wide selection of RP-SMA connectors for different installation needs:

• Cable-mounted RP-SMA connectors for thin and flexible coaxial cables.
• Panel-mount RP-SMA connectors for routers, enclosures and embedded devices.
• Male and female RP-SMA with reversed polarity according to the standard.
• Crimp or solder types for stable and professional assembly.

Compatibility with embedded and IoT modules

RP-SMA connectors are widely used in IoT designs to connect external antennas to:

• Wi-Fi modules (ESP32, ESP8266)
• LoRaWAN modules
• Bluetooth and BLE modules
• Zigbee modules
• LTE/4G/5G low-power modules

Thanks to their compact size and the availability of dedicated pigtails, they are ideal for embedded devices.

Why choose RF-Microwave

• Wide range of RP-SMA connectors for Wi-Fi, WLAN, IoT and embedded applications.
• Professional quality with precise tolerances and selected materials.
• Guaranteed compatibility with commercial routers, antennas and wireless modules.
• Immediate availability for maintenance, prototyping and production.
• Technical support to help select the correct connector for each cable or module.

FAQ – Frequently Asked Questions

What is the difference between SMA and RP-SMA?
RP-SMA connectors feature reversed polarity: the male and female versions have an inverted pin configuration compared to standard SMA.

Are RP-SMA connectors suitable for Wi-Fi?
Yes. They are the most common standard for 2.4 and 5 GHz Wi-Fi antennas and wireless devices.

Can I use an RP-SMA to SMA adapter?
Yes, specific adapters exist, but correct polarity must always be respected.

Are RP-SMA connectors compatible with embedded modules?
Yes. Using U.FL / IPEX → RP-SMA pigtails, they can be connected to a wide range of IoT modules.

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