IEC 60874-14-3:1997

Overview

IEC 60874-14-3:1997 is an International Electrotechnical Commission (IEC) detail specification for the SC simplex fibre optic adaptor designed for single‑mode fibre. Published in 1997, the standard defines mechanical dimensions, materials, performance limits and qualification/inspection procedures for SC adaptors used in datacom and telecom applications. It covers plug–adaptor–plug configurations with push–pull coupling and provides variant options for PC and APC interfaces.

Key topics and technical requirements

• Scope and configuration
  • Type: SC simplex adaptor for single‑mode fibre (plug‑adaptor‑plug, push‑pull coupling).
  • Intended for datacom applications (referenced to ISO/IEC 11801).
• Mechanical and dimensional control
  • Detailed mating‑face and housing dimensions (gauges and tolerances) to ensure interchangeability.
  • Gauge retention force requirement: 2.0 N to 5.9 N (measured with alignment gauge pins).
• Materials and variants
  • Housing: plastic or metal options.
  • Alignment sleeve materials: zirconia or phosphor bronze.
  • Colour coding: SMF (PC) - blue (RAL 5015); APC - green (RAL 6029).
  • Variant matrix provided (variants 1001–1008) covering SMF/OPC/APC and material choices.
• Optical performance
  • Attenuation test method and limits: allowable attenuation < 0.2 dB against two reference plugs; measurement details reference IEC 61300 methods.
• Environmental and mechanical tests
  • Qualification and inspection test schedules include cold, dry heat, damp heat, vibration, mechanical endurance, engagement/separation force, and coupling strength.
  • Climatic category: 10/60/4; environmental category: 4; assessment level A.
• Quality and inspection
  • Fixed‑sample qualification procedure and lot‑by‑lot and periodic conformance inspections with specified sample sizes and AQLs.

Practical applications

• Ensures interoperability across SC connectors and adaptors from different manufacturers.
• Used in design, procurement and acceptance testing of fibre‑optic components for data centers, LANs, telecommunications racks and customer premises cabling.
• Supports component manufacturers, test labs and quality assurance teams in demonstrating conformance to internationally agreed mechanical and optical performance criteria.

Who should use this standard

• Fibre optic connector and adaptor manufacturers
• Component procurement and QA engineers
• Test laboratories and certification bodies
• System integrators and network designers specifying SC adaptor performance

Related standards

• IEC 60874‑1 (generic connector specification)
• IEC 60874‑14‑5, ‑14‑6, ‑14‑10 (reference plug specifications for SC PC/APC)
• IEC 61300 series (optical connector test methods)
• ISO/IEC 11801 (generic cabling reference for datacom)

Safety note: the standard also advises care when handling small‑diameter optical fibres and warns against direct viewing of energized fibre ends.