DIN EN 61755-3-6:2012-10

This standard provides the basis for all fibre-optic connectors with cylindrical ferrule and thus essential part of optical connection technology for type ST, SC and LC connectors as well as all compatible connectors of the same ferrule type. This part of IEC 61755 defines dimensional limits and material properties of a 2,5 mm and a 1,25 mm diameter cylindrical composite ferrule optical interface to meet specific requirements for APC fibre-to-fibre interconnection. The composite ferrule uses different materials in the end face contact zone and in the ferrule to sleeve contact zone. The specified materials for each zone are Zirconia (ZrO₂) for the ferrule to sleeve contact zone and Cu-Ni-alloy for the end face contact zone. Ferrules made from the materials specified in this standard are suitable for use in categories C, U and O as defined in IEC 61753-1. The standard provides manufacturers and test laboratories with security regarding the definition of a test and serves as a reference for quality assurance. The description of fibre-optic connectors by means of the series IEC 61755 is supplemented by the standards on the performance (IEC 61753) and the standards on the fibre optic connector interface (IEC 61754) and reference to this description is made in the CENELEC standards of the EN 50377 series. The responsible committee is Subcommittee DKE/UK 412.7 "LWL-Verbindungstechnik und passive optische Komponenten" ("Fibre optic interconnecting devices and passive optical components") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.