SMC Connectors

SMC Connectors

The SMC interface features threaded coupling with 10-32 threads and is available in 50 and 75 ohm configurations.

SMC connectors offer broadband performance with low reflection DC to 10 GHz and are primarily used in telecommunications and instrumentation applications.

Features and Benefits
  • Conforms to the interface dimensions of MIL-STD-348
  • Threaded coupling ideal for applications where vibration resistance is important
  • Ideal for semi-rigid cables or miniature flexible cables
  • Antennas
  • Instrumentation
  • Telecommunications
  • PC/LAN

SMC Connectors Specifications


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


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


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