Quadrax/ Differential Twinax for MIL-DTL-38999 Connectors

Amphenol Aerospace
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Amphenol Connectors are ideally suited for the incorporation of shielded contacts for high performance interconnection applications. The circular family is built around MIL-DTL-38999 specifications, with Mil-approved and commercial styles offered. Normal operating voltage for circulars with power contacts only is up to 900 VAC (RMS) at sea level.


  • Widest selection of insert arrangements that can incorporate
    Size 8 high speed Quadrax and Differential Twinax contacts for MIL-DTL-38999 Series III (specially modified to accommodate keyed contacts) 
  • Transition adapters for use in attaching D38999 Series III connectors with high speed quadrax or differential contacts to PCB boards 
  • Wide selection of connector shell styles and sizes 
  • Scoop-proof recessed design in LJT-R, TV-R and SJT-R connectors provide protection for contacts


  • Military & Commercial Aviation 
  • Military Vehicles 
  • Missiles & Ordnance 
  • C4ISR 
  • Harsh Environments