SMC
SMC

The SMC name derives from SubMiniature C (the third subminiature design). The SMC design was developed in the 1960's. SMC has threaded coupling with 10-32 threads. The SMC connector offers the same low cost and small size as the SMB connector, but the SMC screw-on mating provides extra mating stability. In addition the SMC connector offers extended frequency range DC to 10 GHz.

 

SV Microwave’s SMC connectors conform to the interface dimensions of MIL-STD-348 and offer customers another choice as they provide intermatability with other connector suppliers. Some of the applications SMC connectors as used in include cable assemblies, PC/LAN, surge protection, and video systems.

 

 

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Features & Benefits
  • Broadband performance with low reflection DC to 10 GHz provides low cost connector combined with high quality
  • Conforms to the interface dimensions of MIL-STD-348 provides intermatability with other connector suppliers. Offers customer second source
  • 10-32 screw-on (threaded) coupling mechanism allows performance to 10GHz with low reflection
  • Right Angle connectors, available in one piece construction, ensure better performance combined with low cost

 

Applications
  • Antennas
  • Automotive (GPS)
  • Base Stations
  • Cable Assemblies
  • Components
  • PC/LAN
  • Surge Protection
  • Video Systems
  • Process Controls
  • Telecom
  • Instrumentation
  • Radio Boards

         

Technical Specifications
Electrical

Frequency Range

0-4 GHZ with low reflection; usable to 10.0 GHz

Nominal Impedance

50 Ohms

Voltage Rating

Sea level: 335 volts
70,000 ft: 85 volts

Dielectric Withstanding Voltage (max.)

750 VRMS RG-196
1000 VRMS for RG-188 type

VSWR

RG-196/U series
Straight connector, 1.30 + .04 f (GHz)
Right angle connector, 1.45 + .06 f (GHz)

RG-188/U series
Straight connector, 1.25 + .04 f (GHz)
Right angle connector, 1.35 + .06 f (GHz)

Contact Resistance

Center contact

 

 

Outer contact

 

 

Braid to body


Initial 6.0 Milliohms
after environ. 8.0 Milliohms


Initial 1.0 Milliohms
after environ. 1.5 Milliohms


Initial 1.0 Milliohms
after environ - N/A

Insulation Resistance

1,000 Megohms minimum

Insertion Loss

Straight connectors:
0.30 dB @ 1.5 GHz

Right angle connectors:
0.60 dB @ 1.5 GHz

RF Leakage

-55 dB minimum @ 2-3 GHz

 

Mechanical

Mating

50 Ohm screw-on coupling
per MIL-STD-348

Mating Torque

Recommended: 2-3" lbs.
Maximum: 6.6" lbs.
80-110 N.cm

Connector Affixment to Cable

Braid and Jacket: hex. crimp

Cable Affixment to Center Contact

Solder

Contact Captivation

All types, except noted otherwise

Cable Retention

Equal to breaking strength of cable employed

Connector Durability

500 mating and unmating cycles minimum

 

Materials

Bodies

Brass per QQB-626 or zinc per ASTM B86-71, as specified, nickel or gold plated as listed

Center Contacts

Female: beryllium copper, gold plated
Male: brass or beryllium copper, gold plated

Outer Contact

Nickel or gold plated as listed

Crimp Ferrules

Annealed copper alloys

Insulator

TFE

 

Environmental

Temperature Range

- 65°C to +165°C

Thermal Shock

MIL-STD-202 method 107 condition C

Vibration

MIL-STD-202 method 204 condition D

Shock

MIL-STD-202 method 213 condition C

Corrosion

MIL-STD-202 method 101 condition B