IEC 60874-19-2:1999

Overview

IEC 60874-19-2:1999 is an IEC detail specification for the SC duplex fibre optic adaptor used with single‑mode fibre connectors. Published as part of the IEC 60874 series (IEC QC 910005XX0002), this standard defines mechanical dimensions, material/variant options, performance limits and qualification/inspection procedures for SC duplex adaptors intended for datacom and cabling applications (plug–adaptor–plug, push‑pull coupling).

Key topics and technical requirements

• Product scope: SC duplex adaptor for single‑mode fibres; configuration plug–adaptor–plug; push‑pull coupling.
• Variants & materials: plastic or metal housings; alignment sleeve materials such as zirconia or phosphor bronze. Variant numbering covers PC (SMF) and APC types (angled) with color coding: SMF = blue (RAL 5015); APC = green (RAL 6029).
• Control dimensions & mounting: detailed mating‑face and panel‑piercing dimensions are specified; panel mounting notes include a maximum panel thickness of 1.6 mm when using spring hooks and an M2 thread recommendation when bolted.
• Mechanical retention: Gauge retention force measured with gauge pins - PC: 2.0 N to 5.9 N; APC: 2.9 N to 5.9 N.
• Optical performance: attenuation methodology defined (Method No. 8, LD source, 1.3 µm, averaging 5 measurements). Allowable attenuation: < 0.2 dB against two reference plugs. Initial and final attenuation requirements referenced as < 0.75 dB per relevant plug specifications.
• Environmental & climatic: climatic category 10/60/4 and environmental category 4. Specific environmental tests include cold (−10 °C, 96 h), dry heat (60 °C, 96 h), damp heat, vibration, temperature change and mechanical endurance.
• Quality & qualification: fixed‑sample qualification schedule and lot‑by‑lot and periodic conformance inspection plans are provided. Tests reference IEC 60874‑1 and IEC 61300 series for measurement methods.

Applications and who uses it

• Manufacturers and designers of optical components and patch panels developing or verifying SC duplex adaptors for single‑mode networks.
• Quality, compliance and test engineers performing qualification, production inspection and environmental testing of adaptors.
• System integrators and cabling specifiers using SC duplex adaptors in datacom, enterprise and structured cabling per ISO/IEC 11801 requirements.
• Procurement and regulatory personnel who need a reference for mechanical interchangeability, performance limits and variant selection (PC vs APC, sleeve material, housing).

Related standards

• IEC 60874‑1 (generic specification / QC 910000)
• IEC 60874‑14 series (reference plug detail specifications cited for SC‑PC and SC‑APC plugs)
• IEC 61300 series (test methods referenced)

Keywords: IEC 60874-19-2, SC duplex adaptor, single‑mode fibre connectors, fibre optic adaptor, SC adaptor, attenuation, gauging, qualification testing.