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SMA Connector

Your Leading SMA Connector Supplier

 

Zhenjiang Tongda Electronic Co., Ltd., founded in 1989, is a professional manufacturer of RF connectors, surge protectors, RF cables, adapters, and die-cast parts. With 26,680 m² of facilities and advanced CNC and testing equipment, we provide high-quality products that meet ISO9001, TS16949, ISO14000 and RoHS standards. Tongda serves global markets, including North America and Europe, and is a trusted supplier for leading telecom companies. We focus on innovation, stable quality, and customer-oriented service.

 

 
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Why Choose Us?

Rich experience

With decades of experience in RF connectors and related components, Tongda provides mature technologies, stable production processes, and reliable product performance to meet international standards.

Advanced equipment

Equipped with nearly 100 sets of high-precision machinery—such as Brother machining centers, CNC lathes, and automated cutting machines—and comprehensive testing equipment including PIM testers, network analyzers, and environmental test chambers, ensuring strict quality control.

Strong R&D capability & innovation

Cooperating with Southeast University and Jiangsu University, Tongda has established an RF Connector Research Center and received 58 national patents, including 18 invention patents, demonstrating strong technological innovation capability.

Our services

We provide full-cycle service: Customers receive smooth communication, fast processing, and dependable assistance from order to delivery and beyond.

 

 

Types of SMA Connector：

 

 

By Polarity and Gender

Standard-polarity SMA connectors:In standard-polarity SMA connectors, the center conductor of a male connector is a pin, while the center conductor of a female connector is a socket. This is the most common type of SMA connector and is widely used in various RF applications.

SMA Male Connectors: These connectors have a center pin contact that inserts into the mating female connector.
SMA Female Connectors: These connectors have a center socket contact that receives the male pin.

Reverse-polarity RP-SMA connector:

In reverse-polarity RP-SMA connectors, the polarity of the center conductor is reversed compared to standard SMA connectors. So, a male RP-SMA connector has a socket as the center conductor, while a female RP-SMA connector has a pin.

RP-SMA Male Connectors: These connectors have a center socket contact, which is inverted compared to standard SMA connectors.
RP-SMA Female Connectors: These connectors have a center pin contact, mating to RP-SMA male connectors.

By Mounting Method

SMA Cable Type Connectors: These connectors are designed to be directly soldered or crimped onto a coaxial cable, providing a flexible and customizable solution. Depending on the termination method, these connectors can be categorized into SMA solder connectors, SMA crimp connectors, SMA clamp connectors, and so on.

SMA Panel Mount Connectors: These connectors are designed to be mounted on a panel or chassis, offering a secure and rigid connection. Based on their mounting features, these connectors can be further categorized into SMA bulkhead connectors and SMA flange connectors.

SMA PCB Connectors: These connectors are designed for surface mount or through-hole mounting on a printed circuit board, enabling integration into compact electronic devices. We can further categorize these connectors into through-hole SMA PCB connectors, surface-mount SMA PCB connectors, and edge-mount SMA PCB connectors.

 

Advantages of SMA Connector：

 

Reliability

The SMA connector's sturdy structure provides a reliable connection that is not easily loosened, thus ensuring stable signal transmission.

01

Wide application

SMA connectors are widely used in wireless communication, RF test, antenna system and other fields, suitable for all kinds of RF application scenarios.

02

Stable performance

SMA connectors are stable in high frequency and RF applications, providing good signal transmission performance and matching characteristics.

03

Standardizedy

SMA connectors conform to standardized specifications, which are easy to obtain and use, as well as have good interchangeability.

04

Easy to install

The SMA connector is relatively easy to install, usually only need to screw the connector into the corresponding interface to complete the connection.

05

 

 

Applications of SMA Connector：

 

 

RF Connector SMA Male for RG178 Cable Crimp Type SMA-C-J1

 

Wireless communication: SMA connectors are often used in wireless communication systems, such as wireless network equipment, antennas, RF modules, etc.

 

Test and measurement: SMA connectors are commonly used in test and measurement equipment, such as Network analyzer, Spectrum Analyzer, power meter, etc.

 

Satellite communications: SMA connectors are widely used in satellite communications systems, including satellite antenna and ground equipment between the connection.

 

Military and aerospace: SMA connectors are commonly used in military and aerospace radar systems, navigation equipment, communications equipment.

 

Medical equipment: SMA connectors are commonly used in medical equipment, medical imaging equipment, wireless monitoring equipment.

 

Scientific research: SMA connectors in the scientific research field for laboratory equipment, RF measurement equipment.

 

Automotive electronics: SMA connectors are commonly used in automotive electronics in automotive communication systems, navigation equipment, wireless sensors and so on.

 

Industrial automation: SMA connectors are used in the field of industrial automation for wireless sensor networks, industrial robots, wireless monitoring and so on.

SMA Female Cap with Chain

 

 

Customization process

 

 

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Packing&Shipping

 

 

productcate-500-400
productcate-500-400

 

 

Our Certificate

 

 

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FAQ

 

 

Q: What are the primary types of SMA connectors?

A: Male (inner pin) and female (sleeve); RP-SMA variants invert the pin/sleeve arrangement.

Q: What is the characteristic impedance of SMA connectors?

A: 50 ohms, which supports proper impedance matching in RF systems.

Q: How do RP-SMA connectors differ from standard SMA?

A: RP-SMA uses a reversed pin/sleeve configuration to prevent unintended mating with standard SMA.

Q: What are the main benefits of SMA connectors?

A: Secure threaded coupling, high-frequency capability, and durability in harsh environments.

Q: How do SMA connectors compare to BNC or N-type/TNC?

A: SMA excels in compact, high-frequency applications; BNC is common in video/lab contexts; N-type/TNC offer robust options depending on frequency and power needs.

Q: What is the difference between SMA male and SMA female connectors?

A: An sma male connector has a center pin with external threads, while the sma female connector includes a center socket with inner threads. They fit together to form a secure RF connection.

Q: How do I choose the right SMA connector for my antenna system?

A: First, confirm whether your antenna uses an SMA female or RP-SMA female port. Then match it with the correct sma male connector or RP-SMA male cable. Pay attention to impedance—most antennas require 50Ω—and, for outdoor setups, always select an sma waterproof connector with IP67 sealing.

Q: How do I crimp an SMA connector correctly?

A: When working with an sma crimp connector, use the correct stripping dimensions and a ratcheted crimp tool. For RG316 cable, the inner conductor strip length is around 3.0 mm, with ferrule crimp depth of 2.5–3.0 mm. After crimping, check visually that no braid is loose and confirm continuity with a multimeter.

Q: What materials should I consider when purchasing SMA connectors for outdoor use?

A: For outdoor or industrial projects, connectors built with stainless steel housings and gold-plated brass contacts last longer. Pairing them with PTFE dielectric ensures stable performance from -65°C to +165°C.

Q: Can I use a right-angle SMA connector for tight spaces?

A: Yes. A sma right angle connector is ideal when space is limited or when cables need to be routed sideways from a PCB. TEJTE’s SMA-KWE right-angle jacks, for example, are tested at ≤0.15 dB insertion loss @ 6 GHz, providing stable performance even in compact enclosures.

We're professional sma connector manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to wholesale sma connector for sale here and get pricelist from our factory. For price consultation, contact us.

Right Angle Coaxial SMA Connector, SMA-JWB2, SMA-KWE 1.13