2.92mm Connector VS SMA : A Complete List of Differences

With the continuous development of communication technology, RF connectors play a crucial role in modern electronic devices. Among RF connectors, 2.92mm connectors and SMA connectors are common types that play important roles in various applications. This article mainly explores the differences between 2.92mm connectors and SMA connectors, analyzing their differences in electrical performance, frequency range, size durability, and cost, providing you with a comprehensive understanding of these two connectors, hoping to be helpful in practical applications.

2.92mm Connector

The 2.92mm connector appeared later than the SMA connector, with higher performance and stability to meet the growing demand for high-frequency RF applications. It filled some performance gaps in the high-frequency RF market at that time, becoming an important type of high-frequency connector widely used in applications such as microwave communication, satellite communication, testing, and measurement that require high-performance connectivity solutions.

2.92mm connector interface size
2.92mm connector interface size

SMA Connector

The full name of the SMA connector is Sub-Miniature A connector, initially designed to meet the needs of military communication and radar systems. Due to its excellent performance, it gradually found wide applications in the civilian sector.

SMA connector interface size
SMA connector interface size

2.92mm Connector VS SMA Connector

Frequency Range

  • The 2.92mm connector has a frequency range of 40 GHz or higher.
  • The frequency range of SMA connectors is generally DC to 18 GHz, with some models reaching 26.5 GHz.

Center Conductor

  • 2.92mm connectors have a larger center conductor size, usually 2.92mm.
  • SMA connectors have a smaller center conductor size, usually about 1.47mm.

Dimensions and Weight

  • 2.92mm connectors are generally larger and heavier, and are suitable for more harsh environments and requirements.
  • SMA connectors are smaller and lighter, suitable for applications where space is limited or weight requirements are high.

Insertion loss

  • The 2.92mm connector has lower insertion loss and is especially suitable for applications that require higher signal transmission loss.
  • SMA connectors have relatively high insertion loss and are suitable for general RF connection needs.

Pressure Resistant

  • The maximum withstand voltage of the 2.92mm connector is 500V.
  • The maximum withstand voltage of SMA connector is 335V.

Maximum Power

  • The maximum power of the 2.92mm connector is 5kW.
  • The maximum power of SMA connector is 1kW.

Temperature Range

  • The temperature range of the 2.92MM connector is -65°C to +125°C.
  • The temperature range of SMA connectors is -65°C to +165°C.


  • 2.92mm connectors are generally more expensive than SMA connectors due to their higher performance and larger size.
  • SMA connectors are relatively more affordable and suitable for general applications and projects with limited budgets.


  • 2.92mm connector: Mainly used in high-frequency radio frequency fields, such as microwave communications, satellite communications, high-frequency test and measurement systems, and other fields with higher performance requirements.
  • SMA connector: Commonly used in wireless communications, antennas, radio frequency modules and other general radio frequency applications, it has wide applicability and reliability.

Here are some differences between the 2.92mm connector and the SMA connector. We hope that through the above introduction, you can have a deeper understanding. Vinstronics provides high-quality RF connectors, specializing in 1.0mm, 1.85mm, 2.4mm, 2.92mm, 3.5mm, SMP, SSMP, and other high-frequency RF connectors. If you have high-frequency RF application needs, you can contact us at sales@vinstronics.com, and our technical consultants will quickly get in touch with you.

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