Project Description

TFOCA-II® 4-Channel Fiber Optic Connectors

Physical Contact Connectors – Hermaphroditic Connectors

In 1999, Amphenol Fiber Systems International (AFSI), in collaboration with the United States Army Communications-Electronics Command (CECOM), designed the “next generation” deployable fiber optic connector for the emerging “knowledge-centric warfare communication” requirements of the future battlefield.

The heart of the TFOCA-II® family of deployable fiber optic connectors centers on the TFOCA-II® sealed free floating termini. The unique termini design enables TFOCA-II® connectors to seal against high humidity and moisture conditions while allowing full axial and orbital movement of the mated termini, providing low insertion loss and minimal back reflection.

This unique connector series was designed and patented by AFSI for use in environmentally harsh conditions. The US Army has standardized on the 4-channel TFOCA-II® connector as the next generation fiber optic connector for military tactical deployable network applications.

TFOCA-II® is a registered trademark of Amphenol Fiber Systems International. The TFOCA-II® is covered by US Patents 6,305,849; 6,371,660, and 6,357,929


  • Hermaphroditic design for versatility, enables multiple TFOCA-II® plug assemblies to be concatenated
  • Removable end cap, allows for easy field maintenance and cleaning
  • 4-channel connector design, two fold improvement over TFOCA with better optical performance
  • Improved cable retention strength, designed to meet 400 lb pull strength while protecting fibers from stress
  • Zn-Ni plating, provides substantial longevity to corrosive environments. Meets new mandate set by the Environmental Protection Agency for eliminating heavy metal plating
  • Commercial ceramic ferrule technology, enables TFOCA-II® connector to provision multimode and single mode interconnect with a variety of polishes including SPC and UPC
  • Solid core alignment sleeves, more robust than split alignment sleeves
  • Hermaphroditic dust cap, plug and/or receptacle dust caps connect together to prevent dust and moisture penetration during deployable conditions
  • Optional key positions – four key positions (1,2,3, universal) available, enabling segregation of mated plug/receptacles or plug/plug, through mechanical interface
  • Field repairable using existing parts, additional connector components (other than termini) are not required to perform field repair
  • Also available in stainless steel and brass, allowing the connector to be used in a variety of applications

Options Available

  • Plug options, key 1,2,3,U
  • Jam nut receptacle
  • Flange mount receptacle
  • Flange mount strain relief receptacle (SRR)
  • Jam nut mount to ST adapter receptacle
  • Stainless steel plug and/or jam nut receptacle available upon request
  • EPDM seals for NBC (nuclear, biological and chemical) environments


  • Ferrule: 2.5mm diameter ceramic ferrule
  • Exterior parts: aluminum-zinc/nickel
  • Interior parts: aluminum-annodize/chemfilm
  • Hardware: stainless steel, passivated
  • Seals: nitrile
  • Alignment sleeves: solid core


  • US Army, Navy, and Marine Corps military tactical deployments
  • Oil, gas, and geoscience industries
  • Industrial
  • Broadcast


Description Measurement/Detail
Insertion Loss (Multimode) 0.30dB – Typical, 0.75dB – maximum
Insertion Loss (Single Mode) 0.40dB – Typical, 0.75dB – maximum
Back Reflection (Single Mode-UPC Polish) -50dB – Typical, -40dB – maximum
Operating Temperature -46° C to + 71° C
Storage Temperature -55° C to + 85° C
Mud Five minute immersion, clean with water (per MIL-C-83526/12 /13 requirements)
Water Pressure MIL-STD-810, Method 512.4, 1m, 48hr
Ice Crush DOD-STD-1678, Method 4050
Humidity DOD-STD-1678, Method 4030, 10 cycles
Flammability MIL-STD-1344, Method 1012
Vibration (Operational) MIL-STD-1344, Method 2500.1
Shock EIA/TIA-455-14, Condition A
Mating Durability 2,000 cycles per EIA/TIA-455-21
Cable Seal Flexing 100 cycles per MIL-STD-1344, Method 2017, Procedure 1
Twist 1,000 cycles per EIA/TIA-455-36
Cable Retention 400 lb minimum per EIA/TIA-455-6, 1hr (applies to plug and strain relief receptacles)
Impact EIA/TIA-455-2
Crush Resistance 450 lb minimum per EIA/TIA-455-26
EMI Shielding Effectiveness (Receptacle Only) > 60dB, 15KHz to 10GHz
Corrosion Resistance MIL-STD-1344, Method 1001, Condition A