PROCON expanded beam connector, HMC, D-hole with 1-4 channels for single-mode and multi-mode.

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PROCON HMC expanded beam connectors are available in 1 to 4 channels, multi-mode or single-mode. PROCON HMC expanded beam connectors have been designed for use in demanding harsh environments where size and space requirements are critical.

The HMC connector series is a small expanded beam connector suited for broadcast, military, industrial, and petrochemical applications.


  • 4 fiber channels in single- or multi-mode
  • Advanced expanded beam technology
  • Hermaphroditic interconnection
  • Rugged connector design
  • Extremely repeatable, long life
  • No adaptors needed
  • Easy clean, no special tools


Type Single-mode (SM), Multi-mode (MM) or hybrid
Insertions loss (SM) Typical insertion loss -1,0dB (1310 nm)
Maximum insertion loss -1,5dB (1310 nm)
Insertion loss (MM) Typical insertion loss -1,0dB (1300 nm)
Maximum insertion loss -1,5dB (1300 nm)
Return loss (PDL) 9/125 @ 1310/1550nm >45dB (typical 48dB)


Coupling type Hermaphroditic
Compliant ROHS & REACH
Material Hard anodized aluminum
Freefall 500 falls from 1,2 meters height


Operating temperature -40°C to +85°C
Storage temperature -55°C to +85°C
Water immersion IP67 up to 2m immersion
Flammability DOD-STD-1678, method 5010


Compatible with:

  • Fibreco Mini 3
  • Stratos HMC
HMC D-hole EN
HMC D-hole EN
Expanded beam cleaning instructions EN
Expanded beam cleaning instructions EN
Procon HMC D-hole
Procon HMC D-hole

How to clean the expanded beam connector?

This instruction covers the cleaning procedure for the expanded beam (EB) connectors and its optical interface (mating face, optical path lenses, EB insert and alignment features). These connectors are non-contacting; therefore, mating the connector without cleaning first typically will not cause permanent damage to the optic interface.

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