Optical amplifiers - Test methods - Part 4-1: Gain transient parameters - Two-wavelength method (IEC 61290-4-1:2016); German version EN 61290-4-1:2016
Edition 2017-06

Distribution automation using distribution line carrier systems - Part 4: Data communication protocols; Section 41: Application protocols; Distribution line message specification (IEC 61334-4-41:1996); German version EN 61334-4-41:1996
Edition 1997-09

Waveguide tyoe dielectric resonators - Part 4-1: Blank detail specification (IEC 61338-4-1:2005); German version EN 61338-4-1:2005
Edition 2006-02

Electrostatics - Part 4-1: Standard test methods for specific applications - Electrical resistance of floor coverings and installed floors (IEC 61340-4-1:2003 + A1:2015); German version EN 61340-4-1:2004 + A1:2015
Edition 2016-04

Liquid crystal display devices - Part 4-1: Matrix colour LCD modules - Essential ratings and characteristics (IEC 61747-4-1:2004); German version EN 61747-4-1:2004
Edition 2005-06

Electrical insulation systems - Procedures for thermal evaluation - Part 41: Specific requirements for electrical insulation systems for use in dry-type high-voltage transformers with operating voltages of 1kV and above (IEC 112/427/CD:2018); Text in German and English
Edition 2019-04

Electricity metering equipment - General requirements, tests and test conditions - Part 41: Energy registration methods and requirements for multi-energy and multi-rate meters (IEC 62052-41:2022); German version EN IEC 62052-41:2022
Edition 2023-10

Electricity metering equipment - Dependability - Part 41: Reliability prediction (IEC 62059-41:2006); German version EN 62059-41:2006
Edition 2007-01

Dynamic modules - Part 4-1: Software and hardware interface - 1 x 9 wavelength selective switch (IEC 62343-4-1:2016); German version EN 62343-4-1:2016
Edition 2017-02

Security for industrial automation and control systems - Part 4-1: Secure product development lifecycle requirements (IEC 62443-4-1:2018); German version EN IEC 62443-4-1:2018
Edition 2018-10