IEC PAS 63503-3-30:2023定义了外径为125 μ m的4芯物理接触光纤连接器的光学接口的尺寸限制，该连接器具有2.5 mm或1.25 mm直径的圆柱形氧化锆(ZrO2)套圈，以确保可靠的互连和互配性。 由本文件规定的材料制成的套圈适用于IEC 61753-1中定义的所有操作服务环境。 套圈尺寸和特征包含在IEC 61754系列光纤连接器接口标准中。

IEC PAS 63503-3-30:2023 defines the dimensional limits of the optical interface for 125 μm outer diameter 4-core physically contacting fibre optic connectors with 2,5 mm or 1,25 mm diameter cylindrical zirconia (ZrO2) ferrules to ensure reliable interconnection and intermateability.
Ferrules made from the material specified in this document are suitable for use in all the operating service environments defined in IEC 61753-1.
Ferrule dimensions and features are contained in the IEC 61754 series of fibre optic connector interface standards.