With advancements in telematics and automotive communications technology, RF communication systems have become integral components in today’s automotive, trucking, watercraft, motorcycle, and off-road construction markets. To ensure high levels of electrical and mechanical performance for telematics applications, the worldwide automotive industries have standardized a high-performing, cost-effective RF connector based on the FAKRA and USCAR standards.

Embedded within a plastic housing which features multiple color codes for easy identification and unique keying to prevent mis-mating, FAKRA connectors are designed to perform up to 3 GHz and meet the particular mechanical and environmental requirements of the automotive industry.

Related Products

FAKRA Adapters 

Features and Benefits

  • 14 different mechanical and color codes
  • Plastic housing with locking feature and audible clicking noise
  • Minimum of 100 mating cycles
  • Frequency range of DC - 3 GHz


  • Automotive
  • Global Positioning Satellite
  • Satellite Radio
  • Bluetooth
  • Remote Vehicle Diagnostics
  • Infotainment Systems

FAKRA SMB Specifications

Impedance 50 Ohm
Frequency Range 0-4 GHz 
Performance Spec SAE-USCAR-17, 18
Dielectric Withstanding Voltage (Sea Level) > 1000 VRMS
Spec Requirement 1.40 max
Straight SMB, Cable Group 1 1.15 max
Right Angle SMB, Cable Group 1 1.20 max
Straight SMB, Cable Group 4 1.10 max
VSWR 2 GHz- 4GHz  
Spec Requirement 1.50 max
Straight SMB, Cable Group 1 1.25 max
Right Angle SMB, Cable Group 1 1.35 max
Straight SMB, Cable Group 4 1.15 max
Insulation Resistance 1000 MΩ min
Contact Resistance  
  Center Contact <20 mΩ
  Outer Contact < 10 mΩ
Insertion Loss  
Spec Requirement < 0.3 dB max from DC-3 GHz
Up to 1 GHz < 0.1 dB
Up to 2 GHz < 0.2 dB
Up to 4 GHz < 0.3 dB 
Mating Durability 100 mating cycles min
Plastic Housing Engagement Force  
Engagement  20 N
Disengagement 25 N
Cable Retention Force  
Cable Group 1 110 N
Cable Group 4 180 N
Coding 12 mechanical and color coding
These characteristics are typical and may not apply to all connectors.

Interface Dimensions