SMA Connectors

SMA ConnectorSMA connector is the most popular one among various RF connectors. SMA connector is designed to have 1/4”-36 thread mating. Besides, SMA connector series are available for RF cable types, PCB type, SMT type, receptacle type and edge mount type. SMA connector commonly is used for 0~6GHz, but offers 24GHz max.

Wellshow Technology manufactures various SMA connectors and custom SMA RF cable assemblies in Taiwan. We can provide good quality SMA connectors in short time and welcome OEM or customized RF connector. Contact us by email or call us 886-2-24270488 to start business!

SMA Connector Series

All SMA Connector

SMA Plug Connector

SMA Jack Connector


SMA connector is a precision coaxial connector for microwave applications. The maximum frequency is 24 GHz, recommended frequency range up to 18 GHz. SMA connector have a threaded interface and 50 ohm impedance.

SMA connector are available in various quality classes for different applications with different material options. Various SMA connector are widely used in Telecommunication, GPS Vehicle Tracking System, Wireless LAN (WLAN or Wi-Fi), Microwave Components, Aero and precise testing instrumentation.

Standard and Reverse Polarity SMA connector have high quality and characterized by high durability, high mechanical stability, long service life and optimum electrical features.

Product Range

  • Cable Connectors (straight and right angle) for flexible, semi-flex and semi-rigid cables
  • PCB connectors (straight and right angle)
  • Panel connectors in various flanges
  • Adaptors


  • Cable Assembly
  • Antenna
  • Microwave Comonents
  • Aero
  • Instrumentation
  • W-LAN
  • Vehicle Tracking System
  • GPS
  • Telecommunications
  • Cellular Mobile System



SMA Interface Dimensions

SMA Connector Plug Interface

SMA Connector Plug Interface

SMA Connector Jack Interface

SMA Connector Jack Interface



SMA Connector Technical Characteristics

Impedance50 ohm
Frequency range0 ~ 18 GHz
VSWRStraight type ≤ 1.3 max.
R/A type ≤ 1.5 max.
Dielectric withstanding voltage1000 V rms min. for RG142, RG405
750 V rms min. for RG316, RG402
500 V rms min. for RG178
Working voltage500 V rms max. for RG142, RG405
375 V rms max. for RG316, RG402
170 V rms max. for RG178
Center contact resistance≤ 6.0 mΩ (Milliohms max.)
Outer contact resistance≤ 2.0 mΩ (Milliohms max.)
Insulation resistance≥ 5×103 MΩ (Megohms min.)
Coupling1/4-36 thread
Contact Retention15 in-lbs. min.
Mating torque2 in-lbs. min.
Mating Durability500 cycles min. (For Beryllium copper contact only)
Temperature Range −65ºC ~ +155 ºC
VibrationMIL-STD-202 Meth. 204
Corrosion resistanceMIL-STD-202 Meth. 101
Body, coupling nutBrass, Non-magnetic stainless steel
Center contactBrass for male, Beryllium copper for female
Crimping sleeveAnnealed Brass
Body platingNickel (Ni), Gold (Au), Passivated
Center contact platingGold (Au)

Note: These characteristics are typical and may not apply to all connectors.