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.


Related Products

SMC Adapters


Features and Benefits

  • Conforms to the interface dimensions of MIL-STD-348
  • Consistent electrical performance from DC to 10 GHz
  • 50 Ohm nominal impedance
  • Threaded coupling ideal for applications where vibration resistance is important


  • Antennas
  • Telecommunication
  • Instrumentation
  • PC/LAN

SMC Specifications

Impedance 50 Ohm
Frequency Range 0-4 GHz with low reflection; extended performance up to 10 GHz
Voltage Rating   
Sea Level 335 Volts
70,000 ft 85 Volts
Dielectric Withstanding Voltage (max.)  
RG-196 type 750 VRMS
RG-188 type 1000 VRMS
VSWR for RG-196/U Series  
Straight Connectors 1.30 + .04 f (GHz)
RT Angle Connectors 1.45 + .06 f (GHz)
VSWR for RG-188 Series  
Straight Connectors 1.25 + .04 f (GHz)
RT Angle Connectors 1.35 + .04 f (GHz)
Insulation Resistance 1000 MΩ min
Contact Resistance  
  Center Conductor Intitial: 6.0 mΩ; After environmental: 8.0mΩ
  Outer Conductor Intitial: 1.0 mΩ; After environmental: 1.5mΩ
  Braid to Body Intitial: 1.0 mΩ; After environmental: N/A
RF Leakage  
2-3 GHz -55 dB min
Insertion Loss  
Straight Connectors, 1.5 GHz 0.30 dB
RT Angle Connectors, 1.5 GHz 0.60 dB
Temperature Range -65⁰C to +165⁰C
Thermal Shock MIL-STD-202 Method 107 (test cond. C)
Corrosion MIL-STD-202 Method 101 (test cond. B) 
Vibration MIL-STD-202 Method 204 (test cond. D)
Shock MIL-STD-202 Method 213 (test cond. B)
Contact Captivation All types, except as noted
Connector Durability 500 mating and unmating cycles min
Cable Retention Equal to breaking strength of cable employed
Connector Affixment to Cable Braid and Jacket; hex crimp
Connector Affixment to Center Contact Solder
Mating 50 Ohm screw-on coupling, per MIL-STD-348
Mating Torque Recommended 2-3" lbs. Maximum 6.2" lbs.
These characteristics are typical and may not apply to all connectors.

Interface Dimensions