Amphenol Fiber Systems International TACBeam® Expanded Beam Connectors

Amphenol Fiber Systems International (FSI) TACBeam® Expanded Beam Connectors are MILPRF-83526/20 and /21 qualified expanded beam rugged fiber optic connectors for military and industrial applications. This series is designed for harsh environments and operates in a -46°C to +71°C temperature range. The connectors are hermaphroditic, allowing multiple cable assemblies to connect together to support varying distance requirements. Amphenol FSI TACBeam Expanded Beam Connectors are available in multimode and single mode, can support two or four channels using a common insert, and accept a wide variety of cables for any application.


  • QPL qualified, M83526/20 and /21 qualified
  • Hermaphroditic coupling
  • Enables daisy-chaining assemblies to support varying distances
  • Single-mode and multimode, dual-wavelength qualified connector
  • Expanded beam is less susceptible to contaminants affecting optical performance
  • Marine bronze and stainless steel available
  • Hard black anodized aluminum
  • Cadmium free
  • ROHS compliant


  • C4ISR tactical military ground communications
  • Oil and gas seismic systems
  • Broadcast systems
  • Mining and tunneling equipment


  • 15m plug and receptacle immersion in water
  • Insertion loss
    • 1.5dB in multimode at 850/1300nm, 0.7dB typical
    • 2.5dB in single mode at 1310/1550nm, 1.0dB typical
  • >34dB unmated return loss at 1310/1550nm
  • -46°C to +71°C operating temperature range
  • 95% relative humidity
  • 3000 mating cycles
Published: 2018-08-30 | Updated: 2022-08-16