SMA Type RF Connector Catalog
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What is a SMA Type RF Connector
SMA (Subminiature Type A) connectors are a type of high-performance miniature connector for RF/microwave applications, offering a wide range of frequencies and exceptional durability.
The body is available in stainless steel or brass, depending on the application. The impedance is 50Ω, using a threaded coupling method.
We also offer high-frequency cables when working with bands above 18 GHz. Please inquire for details.
Some SMA type RF connectors are available for purchase from Digi-Key.
High-Frequency Test Cables
Probes (under development)
Probes (under development)
In-Stock Coaxial Cables with SMA Type RF Connectors
1.5D Equivalent Coaxial Cable, SMA Plugs on Both Ends
Micro Coaxial Cable with SMA Bulkhead Jack on One End and U.FL Plug on the Other
Cables Suitable for SMA Type RF Connectors
Micro Coaxial Cables
Trivia: About Cables
- JIS Standard
- Japanese Industrial Standards (JIS) compliant cables. The higher the number of the part number, the thicker the cable. "D: 50Ω" and "C: 75Ω" represent the impedance.
- MIL Standard
- Compliant with US military standards for cables. Begins with the initials "RG" and is also called Mil-Spec.
- Micro Coaxial Cables
- Micro coaxial cables for attaching to miniature RF connectors such as U.FL.
- Shape memory coaxial cables can be bent to a certain degree but have high shielding and low loss (attenuation).
- Coaxial cables with higher shielding and less attenuation than semi-flexible cables using a seamless metal tube.
SMA Type RF Connector Features
The small size of the connector enables high-density mounting in a small space for wiring in equipment and for connections between subassemblies and devices that make up the equipment.
We have a line up of products that can be used in the high-frequency band from DC to 18 GHz and measurement cables that can be used up to 25 GHz.
Unlike the Quick-Connect type, the threaded coupling is recommended for a more secured connection.
SMA Type RF Connectors Applications
Mobile communication base stations, small communication devices, precision measuring instruments, wireless LAN, GPS, etc.
SMA Type RF Connector Standards & Dimensions
Note: The figures provided are typical values. For further details, please contact us.
|MIL-C-39012、IEC 60169-15、JEITA RC-5234
|Threaded Coupling 1/4-36UNS-2A、2B
- Semi-rigid Cable
- ：0.085inch AC 750V one minute、0.141inch AC 1,000V one minute
- Flexible Cable
- ：RG-316/U、RG-188A/U、AC 750V one minute
：RG-142B/U、AC 1,000V one minute
|5,000MΩ min. at DC 500V
|4mΩ max. at DC 0.1A
|0 ～ 12,000MHz
※Conectors for semi-flexible cables are also available, please inpuire.
- Semi-rigid Cable
- ：0.085inch 1.07+0.015fG
|Stainless steel, brass
|Passivate, nickel plating, gold plating
|Solder, Crimp, Tightening
SMA Type RF Connector FAQ
What is the difference between SMB and SMA connectors?
SMB (Subminiature Type B) connectors are smaller than SMA (Subminiature Type A). SMB connectors use a snap-on method for coupling, whereas SMA connectors use a threaded-on method. The snap-on type requires less effort for coupling but is less sensitive to vibration and is easier to disconnect than the threaded coupling type.
Additionally, SMBs use a lower frequency band than SMAs, so you must consider the installation location and electrical characteristics when installing an SMB.
MCX and MMCX are also miniature connectors that use the snap-on coupling mechanism.
What is reverse polarity?
Are frequencies above 18 GHz supported?
Some SMA connector standard products can support up to 18 GHz. For frequencies above 18 GHz, more advanced cable processing techniques and measuring instruments are required, so we cannot guarantee the connector alone. For the above frequency bands, we sell processed cable products. We can also provide products for frequencies up to 25 GHz upon request.
• View TC series cables measurements
Is there a compatible connector that is even smaller?
There are categories such as 3.5 mm, 2.92 mm (K connectors). The outer diameter is smaller than that of SMA connectors while still being compatible (and coupling-compatible) with SMA connectors. These connectors are compatible with frequencies above 18 GHz.
Our lineup includes the TC series of cables for measurement, 3.5 mm connectors, and 2.92 mm (K) connectors.
Why are SMA, 3.5 mm, and 2.92 mm K compatible but have conversion connectors?
SMA, 3.5 mm, and 2.92 mm are compatible and can be mated. Therefore between series adapters are useful at research facilities, universities, and other sites where severe measurements are required.
• View 3.5 mm SMA adapters
• View 2.92 mm K SMA adapters
Using screws to join connectors is cumbersome. Is there a product that allows quick detachable connectors?
Quick connect adapters, which allows for quick and easy connection with all existing threaded connectors. It improves efficiency at measurement sites. Quick connect adapters are available in N and SMA.
Are waterproof connectors available?
Waterproof SMA connectors are available. IP levels differ depending on the product.
Please find the following for more details.
1. Waterproofing of connector mating parts
2. Waterproofing of the tube at the cable attachment point
3. O-ring waterproofing at the cable attachment point
4. O-ring waterproofing at flange mounting