CeeLok FAS-X Connectors

TE Connectivity
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Introducing TE Connectivity’s (TE) new CeeLok FAS-X connector series, a high speed solution for 10 Gbps data delivery using rugged, mil-spec components. Optimized for high speed signaling, CeeLok FAS-X connectors offer performance beyond what is obtainable with popular pinouts used in standard D38999 connectors. This new product offering surpasses the performance of RJ45 in D38999 connectors with its smaller size (shell size 11 vs shell size 19) and intentional use of standard M39029 contacts suitable for harsh environments. Designed to maintain highly matched 100-ohm impedance and superior signal integrity, CeeLok FAS-X connectors provide a performance margin that enables effective signal delivery in rugged environments.


  • Offer performance beyond what is obtainable with popular pinouts used in standard D38999 connectors
  • Support major protocols including:
    • Gigabit Ethernet and 10G Ethernet networks
    • IEEE 1394b I/O
    • Fibre Channel networks
  • Optimize signal integrity with patented shielding arrangement within modular D38999 design
  • Enable design flexibility with a variety of modules to accommodate various counts of size 22, 20 and 16 contacts in a size 25 shell and allow a convient mixture of power and signal throughout the connector
  • Enhance convenience by utilizing standard crimp AS39029 contacts
  • Allow fast field termination and repair, requiring only standard contact insertion/removal and crimping tools
  • Support variety with aluminum or composite shells available in different finishes
  • Ensure design flexibility with a range of inserts for size 25 shell to accommodate other connectivity needs


  • Military aviation
  • Commercial aviation
  • Military ground vehicles
  • C4ISR