SMA Female to TNC Female Bulkhead RF Adapter: Features, Applications and Selection Guide
50Ω SMA female to TNC female bulkhead adapter, DC-11GHz, for panel feedthrough in antennas, RF test, GPS and wireless equipment.
PCM-SHM-0041 is a 50Ω SMA female to TNC female bulkhead RF adapter designed for DC–11GHz signal transmission. It features a compact coaxial feedthrough structure, threaded SMA/TNC interfaces, >5000MΩ insulation resistance and a Ø12.8mm panel-mount configuration for antennas, wireless systems, GPS and RF test equipment.
Quick Product Introduction
PCM-SHM-0041 Standard Structure:
TNC Female → 500 Internal Coaxial Transition → SMA Female
And through the middle:
Bulkhead Thread + Nut + Hex Mounting Structure
Fixed on the equipment panel.
| Product Name | SMA Female to TNC Female Bulkhead Adapter |
| Premier Cable P/N | PCM-SHM-0041 |
| Connector A | TNC Female |
| Connector B | SMAFemale |
| Mounting Type | Bulkhead Panel Mount |
| Characteristic Impedance | 50Ω |
| Frequency Range | DC-11GHZ |
| Approx. Axial Length | 25mm |
PCM-SHM-0041 Bulkhead vs Inline Adapter
| Comparison | PCM-SHM-0041 Bulkhead | Inline Adapter |
|---|---|---|
| SMA Female | Yes | Yes |
| TNC Female | Yes | Yes |
| Panel Mount | Yes | No |
| Bulkhead Feedthrough | Yes | No |
What Is an SMA-to-TNC Bulkhead Adapter?
An SMA-to-TNC panel mounting adapter is: RF Coaxial Interface Adapter
Its main function is to convert: SMA RF Interface
Converted to: TNC RF Interface
It is also fixed on the chassis, equipment panel or metal partition through the Bulkhead structure
The PCM-SHM-0041 still maintains a typical coaxial structure internally:
Center Conductor
● Dielectric
● Outer Conductor
The center conductor is responsible for RF signal transmission;
The external conductor simultaneously takes on the signal circuit and electromagnetic shield;
The insulating medium isolates the center conductor from the outer conductor and helps maintain thetarget 50n characteristic impedance.
Therefore, it is not simply:
Two metal interfaces connected together'.but rather a segment that
mustmaintain:
RF Impedance Continuity microcoaxial transmission channel
What Is an SMA Connector?
SMA is a miniature threaded RF coaxial connector.
Standard SMA connectors typically feature a: 50Ω
impedance and are widely used in:
Antennas;RF modules;Wireless communications;Test and measurement;Microwave equipment;GPS;Navigation;Radar.
Standard SMA connectors use a 1/4-36 threaded coupling structure, providing a compact and relatively stable mechanical connection.
According to publicly available specifications from Amphenol RF, standard SMA connectors are designed with a 50Ω impedance, and conventional products can cover frequencies from DC to 18GHz, while some extended designs can reach higher frequencies.
However, for the complete PCM-SHM-0041 adapter:
It should be advertised as DC–11GHz
rather than directly applying the 18GHz or higher frequency capability of the SMA interface itself.
SMA is a compact threaded 50Ω RF connector widely used in antennas, microwave systems and RF test equipment.
Common Industrial Ethernet Challenges
Core Product Value
PCM-SHM-0041
◆ 50Ω Broadband RF Transmission and Direct SMA-to-TNC Conversion
PCM-SHM-0041 features a 50Ω coaxial transmission path with an operating frequency range of DC–11GHz. Its female SMA and female TNC interfaces enable direct connection between compatible RF equipment, antennas, and coaxial cables. By reducing additional pigtails and multiple adapter stages, the design helps minimize interface count and potential impedance discontinuities. It is suitable for wireless communications, GPS, navigation, microwave equipment, and GHz-level test and measurement systems. Actual transmission performance should be verified within the complete RF signal chain.
◆ Bulkhead Panel Mounting and Secure Dual-Threaded Connection
PCM-SHM-0041 incorporates a bulkhead feedthrough structure secured by mounting threads, a hexagonal positioning section, and a nut. This arrangement allows internal RF signals to be routed to an external equipment panel, creating a stable and serviceable RF interface. Threaded coupling on both the SMA and TNC sides helps maintain mating security while reducing the risk of external cable insertion and removal forces being transferred directly to internal PCBs. It is suitable for industrial control, wireless communication, test instruments, and equipment exposed to vibration or movement.
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Compatibility Statement
Compatibility Verification
PCM-SHM-0041 features standard 50Ω female SMA and female TNC interfaces. However, similar connector appearances do not guarantee RF compatibility.
Before selection, verify connector gender, standard or reverse polarity configuration, 50Ω/75Ω impedance, operating frequency, RF power, VSWR requirements, and panel mounting dimensions to avoid mating issues or degraded performance.
Important:
SMA ≠ RP-SMA
TNC ≠ RP-TNC
Technical Compatibility Notice
-
The 50Ω rating of PCM-SHM-0041 refers to its coaxial characteristic impedance, not an internal termination resistor. DC–11GHz represents the adapter's designed operating frequency range.
Actual performance depends on connector mating, VSWR, insertion loss, coaxial cables, and the complete RF signal chain. System requirements should be verified before selection; the frequency range does not guarantee lossless transmission.
Technical Distinctions:
50Ω Adapter ≠ 50Ω Terminator
11GHz Frequency Range ≠ Guaranteed Zero-Loss Transmission at 11GHz
How to Choose an SMA-to-TNC Adapter ?
Verify Impedance and Frequency
Verify that the complete RF system uses 50Ω impedance and operates within the adapter's DC–11GHz frequency range.
Verify Gender and Polarity
Confirm female SMA and female TNC interfaces as well as standard versus reverse polarity before ordering.
Verify Panel Dimensions
Check panel cutout, thickness, nut clearance and connector-access space rather than relying only on the nominal hole diameter.
Verify RF Performance and Environment
High-frequency, high-power or precision test systems should additionally verify VSWR, insertion loss, power handling and environmental requirements.
Customization Capabilities
↕ SMA/TNC Interface Customization
SMA and TNC gender combinations, including project-specific polarity requirements, can be customized.
□ Impedance and Frequency Customization
Coaxial structures can be optimized according to impedance, frequency and RF performance requirements.
◉ Bulkhead Mount Customization
Bulkhead thread length, panel thickness, anti-rotation features and mounting hardware can be customized.
⚙ Material and Plating Customization
Contact materials, body materials and plating options can be selected for electrical, environmental and lifecycle requirements.
⌘ Environmental and Sealing Customization
Sealing structures can be developed for outdoor applications, with IP performance subject to complete assembly validation.
◇ OEM/ODM RF Adapter Development
OEM/ODM RF adapters can be developed according to connector, frequency, impedance, panel and high-frequency performance requirements.
Conclusion：
PCM-SHM-0041 is a 50Ω SMA female to TNC female bulkhead RF adapter designed for DC–11GHz signal transmission and fixed panel feedthrough.
It combines interface conversion, coaxial impedance control and mechanical mounting in a single compact component.
Successful RF integration depends not only on connector mating, but also on impedance, polarity, frequency, VSWR, insertion loss and complete system requirements.
Product FAQ
SMA vs TNC
SMA emphasizes compact high-frequency connectivity, while TNC offers a larger threaded interface well suited to rugged RF installations.
Does 50Ω Mean a Built-In Resistor ?
No. A 50Ω adapter does not contain a 50Ω termination resistor. The value describes RF transmission-line impedance.
Why Does Impedance Mismatch Cause Reflection ?
Impedance discontinuities can reflect RF energy, increasing VSWR and reducing signal-transfer efficiency.
What Is VSWR ?
VSWR indicates how well the RF path is impedance matched. Lower VSWR generally means lower signal reflection.
Why Is the Adapter Rated to 11GHz Rather Than 18GHz ?
The complete adapter should be rated according to the limiting element in the RF path, which is why PCM-SHM-0041 is specified to DC–11GHz.
What Is a Bulkhead Mount ?
A bulkhead adapter passes through and mounts to an enclosure wall, creating a fixed RF interface between the inside and outside of equipment.
