HomeCoaxialSMA CoaxialAir Cables / Components

Coaxial SMA Air Cables

placeholder image

Coaxial SMA Air Cable Assemblies and Components

Connector to Connector SMA air cable assemblies are fitted with standard SMA connectors at both ends of an RG174/U coaxial cable.  The cables mate directly with the air side of SMA feedthrough flanges.

SMA Connector is a standard air service connector without cable.

SMA Coaxial Interface

The 'Subminiature Type-A' coaxial connector, referred to as the SMA coaxial interface, is commonly used in conjunction with high-frequency, low noise 50-ohm instrumentation signal lines. SMA coaxial feedthroughs are constructed in both grounded and floating shield configurations. Floating shield types provide two concentric conductor paths: an outer metal conductor tube (shield) concentric with, and enclosing, a cylindrical center conductor pin. Both paths are electrically isolated from each other and a mounting flange. Grounded shield SMAs provide only one path that's electrically isolated from the flange, where grounded shield and flange are electrically common.

Vacuum side of single-ended grounded and floating SMA feedthroughs have a 0.094 inch (2.4-mm) diameter conductor pin that mates with grounded or floating AccuFast™ connectors. Vacuum compatible cable assemblies are fitted with Kapton® insulated 26 AWG, 50-ohm coaxial cable, with either Accufast™ connectors or gold-plated SMA connectors.


  • SMA Coaxial Interface
  • Grounded and Floating Shield
  • Single and Double Ended Configurations
  • Kapton® insulated 50-Ohm cable
  • High temperature rated to 250°C
  • UHV compatible construction
  • Conflat® and ISO KF compatible mounts
  • Air service cables/connectors
  • Custom solutions on request

mating warning diagram on SMA and Microdot S93 threads