IEC 60874-14-4:1997

Overview

IEC 60874-14-4:1997 is an IEC detail specification for the SC (simplex) fibre optic adaptor for multimode fibre. Published in 1997 by IEC subcommittee 86B, it defines mechanical dimensions, materials variants, performance requirements and qualification/inspection procedures for SC push-pull adaptors used in datacom applications. The document complements the generic IEC 60874-1 family and ties test methods to the IEC 61300 series.

Key topics and technical requirements

• Scope and classification: Type SC, configuration plug–adaptor–plug, push–pull coupling, intended for multimode fibre (MMF) and datacom (e.g., ISO/IEC 11801).
• Mechanical dimensions and alignment: Detailed mating-face and housing control dimensions are specified (including a pin-gauge for alignment sleeve). The adaptor alignment feature is an alignment sleeve; gauge retention force is specified and measured with two gauge pins.
• Materials and variants: Variant options include plastic or metal housings and sleeves made from zirconia or phosphor bronze; standard colour for MMF adaptors is Beige (RAL 1013).
• Performance / optical limits:
  • Attenuation: Allowable attenuation less than 0.2 dB against two reference plugs (LED source, peak 1.3 µm). Reference adaptor selection criteria and measurement averaging are specified.
  • Environmental: Climatic category 10/60/4, environmental category 4, assessment level A.
  • Example cold test: attenuation limits and change during cold cycling (–10 °C) are specified (attenuation < 0.75 dB; change < 0.2 dB).
• Qualification & inspection:
  • Fixed-sample qualification test schedule covering visual, dimensions, gauge retention, attenuation, cold/dry-heat/damp-heat, engagement/separation force, mechanical endurance, vibration and strength of coupling mechanism.
  • Lot-by-lot and periodic quality conformance inspection schedules are defined, with sample sizes and acceptable quality levels referenced.
• Safety note: Caution on handling small-diameter optical fibre and avoiding direct eye exposure to propagating light.

Applications

• Specification used for design, manufacture and acceptance of SC simplex adaptors in:
  • Telecommunications and datacom networks
  • Patch panels and fibre distribution frames
  • Data centres and enterprise cabling
  • Optical interconnect components in network equipment
• Useful for ensuring interoperability, low-loss connections and environmental robustness of MMF SC adaptors.

Who should use this standard

• Fibre optic component manufacturers and designers
• Test laboratories and quality assurance teams performing qualification and lot inspections
• Procurement and compliance officers specifying adaptor performance
• Network engineers and installers referencing component specifications for datacentre and cabling projects

Related standards

• IEC 60874-1 (generic connector specifications)
• IEC 60874-14-1 (reference plug definitions)
• IEC 61300 series (test methods for fibre optic interconnecting devices)
• ISO/IEC 11801 (generic cabling for customer premises)

Keywords: IEC 60874-14-4, SC adaptor, SC simplex adapter, multimode fibre, fibre optic adaptor specification, attenuation requirements, gauge retention force, IEC fibre connector tests.