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Semiconductor devices. Mechanical and climatic test methods - Damp heat, steady state, highly accelerated stress test (HAST). Original standard UNE-EN 60749-4-2017 in PDF full version. Additional info + preview on request

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Nuclear facilities. Electrical equipment important to safety. Qualification. Original standard UNE-EN 60780-323-2017 in PDF full version. Additional info + preview on request

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Optical fibres - Product specifications. Sectional specification for polarization-maintaining fibres. Original standard UNE-EN 60793-2-70-2017 in PDF full version. Additional info + preview on request

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Amendment 1 - Miscellaneous lampholders - Particular requirements. Lampholders for double-capped linear LED lamps. Original standard UNE-EN 60838-2-3-2017 A1-2023 in PDF full version. Additional info + preview on request

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Miscellaneous lampholders Part 2-3: Particular requirements - Lampholders for double-capped linear LED lamps. Original standard UNE-EN 60838-2-3-2017 in PDF full version. Additional info + preview on request

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Alarm and electronic security systems - Electronic access control systems. Core interoperability protocol based on Web services. Original standard UNE-EN 60839-11-31-2017 in PDF full version. Additional info + preview on request

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