SMC Connectors
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SMC Connectors

Versatile threaded RF interconnects delivering broadband performance up to 10 GHz

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Overview

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Amphenol RF SMC connectors are precision-engineered, subminiature threaded coaxial interfaces optimized for RF and microwave applications. They conform to MIL‑STD‑348, ensuring compatibility with industry-standard equipment, while offering reliable 10‑32 UNF threaded coupling up to 10 GHz. Available in straight and right-angle PCB, bulkhead and cable-mount formats, these 50 Ω (and 75 Ω variants) connectors are ideal for space-constrained environments.

The compact design supports wireless systems, video instrumentation, test equipment and automotive telemetry. With both crimp and solder terminations, Amphenol RF offers flexible configuration options tailored to diverse assembly needs. You can explore our range of standard SMC connectors—or if your application needs customized cable assemblies or configurations, contact us today.

Features and Benefits
  • Broadband performance: Low VSWR from DC to 10 GHz in 50 Ω; 75 Ω versions also available for video/broadcast needs
  • Reliable coupling: 10‑32 UNF threaded interface ensures stable connection and vibration resistance
  • Compact form factor: Subminiature size suitable for tight PCB layouts and portable designs
  • Diverse mounting styles: Available as right-angle, bulkhead, PCB-mounted and cable-mount configurations
  • High-quality finishes: Gold-plated brass contacts ensure excellent conductivity and corrosion resistance
Key Technical Details
  • Impedance: 50 Ω standard; 75 Ω variants available
  • Frequency range: DC–10 GHz (connector performance; cable PCB dependent)
  • Coupling mechanism: 10‑32 UNF threaded
  • Connector configurations: Straight, right-angle, bulkhead, PCB, cable-mount; crimp or solder termination
  • Compliance: MIL‑STD‑348 compatible
  • Contact plating: Gold over brass for reliability and low loss
Applications
  • Wireless/base-station RF front ends
  • Test and measurement instrumentation
  • Video systems and broadcast equipment
  • Automotive GPS and telemetry
  • Compact PCB RF networks and microwave modules

Explore our standard SMC connector lineup for reliable, broadband coaxial connectivity. If your design requires custom terminations, orientations or packaging formats, our engineering team is ready to assist—contact us today.

Specifications

SMC Connectors

Electrical

Impedance 50 Ohm
Frequency Range DC - 4 GHz (DC - 10 GHz on Extended Range Designs)
Voltage Rating (Sea Level) 335 Volts RMS Continuous
Voltage Rating (70,000 ft) 85 Volts RMS Continuous
Dielectric Withstanding Voltage
RG-178/RG-196 Group
 750 VRMS Min
RG-174/RG-316/RG-188 Group
 1000 VRMS Min
VSWR (Return Loss)
RG-178/RG-196 Group
Straight Connectors
 1.30 + .04 f (GHz) DC - 4GHz
Right Angle Connectors
 1.45 + .06 f (GHz) DC - 4GHz
RG-174/RG-316/RG-188 Group
Straight Connectors
 1.25 + .04 f (GHz) DC - 4GHz
Right Angle Connectors
 1.35 + .04 f (GHz) DC - 4GHz
Insulation Resistance 1000 MΩ Min
Center Contact Resistance 6 mΩ Max
Outer Contact Resistance 1 mΩ Max
RF Leakage -55 dB Max (2 - 3 GHz)
Insertion Loss
Straight Connectors
 0.30 dB @ 1.5 GHz Max
Right Angle Connectors
 0.60 dB @ 1.5 GHz Max
Power Handling 95 W @ 1 GHz @ 25ºC

Environmental

Temperature Range −65°C to +165°C
Thermal Shock MIL-STD-202 Method 107 (Test Condition B)
Corrosion MIL-STD-202 Method 101 (Test Condition B)
Vibration MIL-STD-202 Method 204 (Test Condition D)
Mechanical Shock MIL-STD-202 Method 213 (Test Condition B)
Moisture Resistance MIL-STD-202 Method 106

Mechanical

Mating Cycles 500 Min
Coupling Mechanism Threaded
Interface Specification MIL-STD-348
Mating Torque 0.3 N-m (3 in-lbs)

Note: These characteristics are typical and may not apply to all connectors.
Connector configurations may affect performance.

Interface Dimensions

Plug
Jack

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