SMA RF Connectors Guide: Types, Structure, and Uses Explained
What are SMA RF Connectors?
SMA connectors are the industry standard for high-performance microwave applications, supporting a wide frequency range with exceptional durability. Tyclon offers an extensive range of types and configurations to meet any design requirement, including straight, right-angle, panel mount, bulkhead, and Reverse Polarity (RP-SMA) variants.
Our SMA connectors feature a constant 50 Ω impedance and a secure threaded coupling mechanism, available in stainless steel or brass, depending on the application's environment. You can purchase directly online or contact Tyclon for assistance; technical support, datasheets, and catalogs are available.
SMA RF Connectors by Type
SMA RF Connector Features
Wide Type Selection
Tyclon offers an unmatched range of SMA types, including male and female SMA connectors, as well as specialized configurations such as Right-Angle, Bulkhead, and Reverse Polarity (RP-SMA). We ensure the perfect fit for any high-density or demanding application.
High-Frequency
Our standard product lineup guarantees reliable performance from DC up to 18 GHz. For next-generation systems, we also provide precision high-frequency test cables and specialized connectors certified for use up to 26.5 GHz.
Compact Size and Stability
The miniature form factor enables high-density mounting in tight spaces (ideal for within-equipment wiring). The secure threaded coupling provides superior stability and signal integrity compared to quick-connect alternatives.
Material and Compliance
Available in stainless steel or brass, depending on the required durability and cost-efficiency. Our entire standard SMA range is RoHS and REACH compliant for global distribution.
SMA RF Connector Applications
Our SMA RF connectors are engineered for demanding, high-frequency environments where signal integrity is non-negotiable. They provide reliable $50 \ \Omega$ performance across a broad spectrum of mission-critical applications:
- - Wireless Infrastructure: Mobile communication base stations, 5G test setups, and high-frequency antennae requiring robust signal integrity.
- - Precision Measurement: Ensuring accuracy in precision test and measurement instruments, spectrum analyzers, and laboratory equipment.
- - Embedded Systems: Ideal for connectivity in compact communication devices, GPS systems, and embedded wireless LAN modules where space is limited.
- - Aerospace & Defense: Known for exceptional durability and stable connections up to $18 \ \text{GHz}$ in airborne and defense systems.
SMA RF Connectors: Standards & Technical Specifications
Compatible Standards
Complies with MIL-C-3901, IEC 60169-15 (Global), and JEITA RC-5235 industry standards.
Nominal Impedance
Impedance rating is 50 Ω, indicating compatibility with most standard RF equipment.
Coupling Method (Connector Interface)
Connectors securely join using threaded coupling (1/4-36UNS-2A, 2B threads) for stable signal transmission.
Working Voltage (Rated Voltage)
Rated for standard operating voltage of up to 500 V.
Maximum Withstanding Voltage
Semi-rigid Cable : withstand AC 750 V (0.085") or AC 1,000 V (0.141") for one minute.
Flexible Cable : RG-316/U, RG-188A/U (AC 750 V), RG-142B/U (AC 1,000 V) for one minute.
Insulation Resistance
Minimum insulation resistance of 5,000 mΩ when tested with 500 V, ensuring electrical safety.
Mass Production
Once you are satisfied with the test results and pricing, you can proceed with placing a mass-production order.
Contact Resistance
Maximum contact resistance of 4 mΩ when conducting a DC of 1 A, ensuring efficient connection.
Frequency Range
Suitable for signals within a frequency range from 0 to 12,000 MHz (12 GHz).
Voltage Standing Wave Ratio (V.S.W.R.)
Maintains optimal signal quality with a maximum V.S.W.R. of:
Semi-rigid Cable:
- ・ 0.085 in: 1.07 + 0.015f
- ・ 0.141 in: 1.05 + 0.01f
Note:
- ・ "f" is the operating frequency in GHz.
- ・ Connectors for semi-flexible cables are also available; please inquire for details.
Materials
Made of durable stainless steel and brass, providing strength and reliability under various conditions.
Surface Treatments
Surface options include passivation, nickel plating, and gold plating, enhancing corrosion resistance and conductivity.
Wiring Methods
Available connection methods include soldering, crimping, and tightening, enabling flexible, secure installation.
In-Stock Coaxial Cables with SMA RF Connectors
SMABJ-to-MHF I Micro-Coaxial Cables
SMABJ-to-U.FL Micro Coaxial Cables
Micro Coaxial Cables
Semi-Flexible
Semi-Rigid
Trivia: Compatible Cable Types
- MIL Standard Cables: These cables, also known as Mil-Spec, are engineered to meet rigorous US military specifications for performance and durability. They often feature the "RG" prefix, which stands for "Radio Guide," reflecting their roots in radio technology. They are critical in demanding applications like defense, aerospace, and telecommunications, where reliability is non-negotiable.
- Micro Coaxial Cables: These ultra-thin cables are designed to connect to miniature RF connectors like U.FL. They ensure signal integrity in space-constrained devices such as smartphones, laptops, and medical equipment, making them vital for modern compact electronics.
- Semi-Flexible Coaxial Cables: With moderate flexibility, these cables can bend and hold their shape while offering strong shielding and low signal loss, making them ideal for precise routing in telecommunications, test equipment, and internal electronics.
- Semi-Rigid Coaxial Cables: Made from a seamless metal tube, these cables provide superior shielding and minimal signal loss. Their rigid design ensures stable performance in critical applications like military systems, high-frequency instruments, aerospace, and microwave assemblies.
Note: The figures provided are typical values. For further details, please contact us.
SMA RF Connector FAQs
QWhat is reverse polarity?
QWhat is reverse polarity?
Standard SMA plugs have male contacts, jacks female. Reverse Polarity (RP-SMA) swaps this: plugs have female contacts, jacks male. RP-SMA is often used in radio comms equipment outside Japan.
QAre frequencies above 18 GHz supported?
QAre frequencies above 18 GHz supported?
Standard SMA connectors support up to 18 GHz. Higher frequencies require specialized handling, so standalone connector performance isn't guaranteed. Cable assemblies for up to 26.5 GHz are available.
QIs there a smaller compatible connector?
QIs there a smaller compatible connector?
Yes, 3.5 mm and 2.92 mm (K) connectors are smaller than SMA but remain compatible. They also support frequencies beyond the standard 18 GHz SMA limit. We offer these connectors and test cables.
QWhy do SMA, 3.5 mm, and 2.92 mm K connectors require conversion adapters if they are compatible?
QWhy do SMA, 3.5 mm, and 2.92 mm K connectors require conversion adapters if they are compatible?
Although SMA, 3.5 mm, and 2.92 mm connectors can physically mate, using between-series adaptors guarantees optimal performance, vital for precise measurements in labs and research settings.
QIs there a quicker way to connect and disconnect threaded connectors?
QIs there a quicker way to connect and disconnect threaded connectors?
Yes, quick-connect adaptors provide fast, tool-free connection/disconnection for threaded types like SMA and N, boosting efficiency in test and measurement environments where speed is valuable.
QAre waterproof SMA connectors available?
QAre waterproof SMA connectors available?
Yes, waterproof SMA connectors with various IP ratings are available. Waterproofing methods include sealing the mating interface, cable attachment points, and using O-rings for ingress protection.
QCan SMA connectors be used for both RF and DC applications?
QCan SMA connectors be used for both RF and DC applications?
While designed for RF, SMA connectors can handle low-power DC. However, for high-power DC applications, dedicated DC connectors are recommended for safety and optimal performance reliability.
QHow do I properly clean SMA connectors?
QHow do I properly clean SMA connectors?
Clean SMA connectors using a soft brush, lint-free cloth, and isopropyl alcohol or mild contact cleaner. Avoid abrasives. Regular cleaning maintains performance, especially in harsh environments.
QWhat is the best material for SMA connectors?
QWhat is the best material for SMA connectors?
Common SMA bodies are brass or stainless steel. Inner contacts are typically gold-plated for low loss conductivity. Outer shells use gold or nickel plating for corrosion resistance and durability.
QCan SMA connectors be used in high-vibration environments?
QCan SMA connectors be used in high-vibration environments?
SMAs work in moderate vibration. For high-vibration areas like automotive or aerospace, consider more rugged TNC or N-type connectors with superior locking mechanisms for reliable connections.
QHow can I order SMA connectors, and what support do you offer?
QHow can I order SMA connectors, and what support do you offer?
Ordering is simple—you can purchase our SMA connectors directly on our website or contact our sales team for assistance. We also provide full technical support, including datasheets, CAD models, and application notes, to help you pick the perfect connector for your project.
Purchase Guide
Tyclon coaxial connectors and processed coaxial cable products can be purchased directly online using a variety of credit cards.
