IEC 61754-19:2001

Overview

IEC 61754-19:2001 is an international standard published by the International Electrotechnical Commission (IEC) that defines the standard interface dimensions for the Type SG family of fibre optic connectors. This standard ensures compatibility and interoperability between connectors of the SG family, which are widely used in fibre optic communication systems. The document specifies detailed mechanical and optical interface requirements required for the precise alignment and secure coupling of duplex fibre optic connectors.

Key Topics

• Scope and Purpose
  IEC 61754-19 covers the standardized dimensional and interface criteria for the Type SG connectors. It applies specifically to the plug and socket components within the SG family, ensuring that connectors from different manufacturers comply with a common interface.

• Connector Description
  The Type SG connector family is based on a single-position plug/socket connector set. The plug contains duplex cantilevered optical fibres that flex to mate with the socket’s optical fibre ends. The socket features integral V-grooves that precisely guide and align the plug fibres for optimal optical performance.

• Standardized Interfaces
  The standard defines:

  • 61754-19-1: Duplex plug connector interface with an 8° contact angle
  • 61754-19-2: Duplex socket connector interface with an 8° contact angle
    These connectors are designed to mate with each other reliably.

• Mechanical Features
  The plug includes a spring-release latch and a key to prevent inverted engagement, ensuring safe and repeatable connections. Both plug and socket have integral covers and doors that protect fibre ends from contaminants when disconnected, and which open automatically when connected.

• Dimensional Specifications
  Detailed dimensions such as radii, distances, and angles for plug and socket interfaces are rigorously specified to guarantee precise mating and optical alignment.

• Patent and Licensing Information
  The standard references patent rights held by Minnesota Mining and Manufacturing Company (3M) related to the SG connector design. Licensing terms are managed through the IEC framework to ensure fair access.

Applications

• Telecommunications Networks
  IEC 61754-19 compliant SG connectors are ideal for duplex fibre optic cabling in high-speed telecom infrastructure where accurate fibre alignment and low insertion loss are critical.

• Data Centers & Enterprise Networks
  The precision and reliable coupling make these connectors suitable for data center fibre interconnection, supporting rapid deployment and maintenance.

• Industrial & Harsh Environments
  The protective covers and secure locking mechanism enhance connector durability in industrial applications where contamination and mechanical stress may be present.

• Fibre Optic Components Manufacturing
  Manufacturers of optical transceivers, patch panels, and fibre assemblies use IEC 61754-19 specifications to ensure component compatibility.

Related Standards

• IEC 61754 Series
  This standard is part of the IEC 61754 collection, which encompasses multiple parts defining interfaces for various types of fibre optic connectors.

  • Part 1: General and guidance on fibre optic connector interfaces
  • Other parts: Standards for different connector families such as FC, SC, LC, and more.

• IEC Technical Committee 86
  The standard was developed by subcommittee 86B that specializes in fibre optic interconnecting devices and passive components, ensuring technical accuracy and alignment with modern communication technologies.

• ISO/IEC Standards Collaboration
  IEC cooperates closely with ISO for international unification, so IEC 61754-19 supports harmonized global use.

By adhering to IEC 61754-19:2001, industry professionals ensure that Type SG fibre optic connectors meet stringent dimensional and performance criteria, promoting interoperability, quality, and reliable fibre optic connections across various communication and industrial applications.