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: **