IEC/TC - IEC/TC

IEC 60721-3-5:2026 classifies the groups of environmental parameters and their severities to which a product, not forming part of the vehicle, is subjected when installed on or in a ground vehicle. Such products are for example radios, communication systems, fare meters, flow meters for liquids transported by the vehicle, for example milk, petroleum products, etc. Vehicles where products can be permanently or temporarily installed include
- road vehicles: passenger cars, commercial vehicles, special vehicles, towing vehicles, trailers, mopeds, motorcycles,
- rail vehicles: trains, trams,
- tracked vehicles: excavators, cranes, rubber tracked vehicles,
- overland vehicles: four-wheel drive cars, tractors, snow scooters,
- handling and storage vehicles: fork-lift trucks (manual and robot), luggage transporters, and
- self-propelled machinery: diggers, harvesters.
This third edition cancels and replaces the second edition, published in 1997. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) most classes have been replaced by completely new classes based on the use of additional information obtained from referenced Technical Reports;
b) Table 1 through to Table 7 have been reviewed and updated;
c) the content of Annex A and Annex B has either been incorporated into the main body of the document or deleted.

IEC TR 63179:2026, which is a Technical Report, provides technical information for planning high-voltage direct current (HVDC) systems with line-commutated converters (LCC), voltage sourced converters (VSC), or both. It provides general principles for deciding between HVDC and AC transmission systems, as well as processes and methods for preliminarily defining the HVDC transmission scheme, including selection of converter type and key parameters, grid stability analysis, and technical-economic comparison among various solutions. In addition, this document gives the objectives to be achieved in the planning phase.
This document is applicable for planning a point-to-point or a back-to-back HVDC system.
This document can also be used for DC grid systems (including multi-terminal HVDC systems) as a reference.
This document is not exhaustive. It is possible that there are other specific aspects, that are particularly important for a specific HVDC project.

IEC 62358:2026 provides standard AL values (inductance factors) and their tolerances of Pot, RM, ETD, E, EER, EP, PQ, PM, EC, EFD and low-profile gapped ferrite cores.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of AL value (inductance factor) and its tolerance for PM-cores;
b) addition of AL value (inductance factor) and its tolerance for EC-cores;
c) addition of AL value (inductance factor) and its tolerance for EFD-cores.

IEC TR 63436:2026 explains the setting parameters of insulation monitoring devices (IMDs) and how to interpret these measurements through plotted curves. Some examples of injection methods are also proposed.
The examples given in this document consider the situation of an insulation fault in an installation or equipment (motors, enclosure, cables, etc.) creating a resistive path to earth and calculate the touch voltage. It does not consider a person making direct contact with a live conductor in an IT grid.

IEC 62862-4-2:2026 specifies the technical requirements and test methods for the heliostat field control system of solar power tower plants.
This document provides the technical requirements of function, performance, and safety constraints of the heliostat field control system, and is applicable to the heliostat field control system of solar power tower plants.
This document includes procedures for testing the functionality and performance requirements of the heliostat field control system. It describes the test methods, steps, conditions, and required instruments.

IEC 63479-3:2026 describes the infotainment services for public vehicles (PVIS) framework, including the functional reference models and the information flows for functional operations.

IEC 62541-14:2026 defines the PubSub communication model. It defines an OPC UA publish subscribe pattern which complements the client server pattern defined by the Services in IEC 62541-4. See IEC 62541-1 for an overview of the two models and their distinct uses.
PubSub allows the distribution of data and events from an OPC UA information source to interested observers inside a device network as well as in IT and analytics cloud systems.
This document consists of
• a general introduction of the PubSub concepts,
• a definition of the PubSub configuration parameters,
• mapping of PubSub concepts and configuration parameters to messages and transport protocols,
• and a PubSub configuration model.
This second edition cancels and replaces the first edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Addition of a “Quantity Model” which can be referenced from EngineeringUnit Properties. The model defines quantities and assigned units. In addition it provides alternative units and the conversion to them.
b) Addion of rules for ValuePrecision Property:
• can also be used for other subtypes like Duration and Decimal.
• rules have been added when ValuePrecision has negative values.

IEC 60352-7:20205 is applicable to spring clamp connections made with stripped wire of the following types and sizes according to IEC 60228 or IEC 60189-3, without further preparation.

IEC 62541-24:2026 specifies an OPC UA information model to expose information, at what dates and times specific actions are executed by the OPC UA Server. Those schedules can optionally also be manipulated via the information model.
The schedule defines on which dates they are active, and can also reference global calendars representing specific dates, for example public holidays. In addition, the schedule defines times and actions that will be executed at that time. The model defines writing Variables and calling Methods but can be extended to other actions as well.
The NamespaceUri for all NodeIds defined in this document is defined in Annex A.

IEC TR 62316:2026 which is a Technical report, provides guidance on the interpretation of backscattering traces, as obtained by traditional optical time domain reflectometers (OTDRs) for single-mode fibres. This document does not cover Polarization OTDRs. Also, backscattered power effects are discussed in case of unidirectional trace. Full description of the test measurement procedure can be found in Annex C of IEC 60793‑1‑40:2024. This fourth edition cancels and replaces the third edition published in 2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) update of the fibre types;
b) addition of information as regards attenuation uniformity.

IEC 62047-4:2026 describes generic specifications for micro-electromechanical systems (MEMS) made by semiconductors, which are the basis for specifications given in other parts of this series for various types of MEMS applications such as sensors, RF MEMS, optical MEMS, bio-MEMS, micro TAS, and power MEMS. This document specifies general procedures for quality assessment and establishes general principles for describing and testing of electrical, optical, mechanical and environmental characteristics. This part of IEC 62047 aids in the preparation of standards that define devices and systems made by micromachining technology, including but not limited to, material characterization and handling, assembly and testing, process control and measuring methods. MEMS described in this document are basically made of semiconductor material. However, the statements made in this document are also applicable to MEMS using materials other than semiconductor, for example, polymers, glass, metals and ceramic materials.
This edition includes the following significant technical changes with respect to the previous edition:
a) in the Scope, optical MEMS, bio-MEMS, micro TAS, and power MEMS for various types of MEMS applications were included;
b) MEMS categories and terms in Table 1 were slightly modified such consumer electronics and automotive were added that in application technology.

IEC 60794-1-131:2026 describes the test procedures used to establish uniform requirements for microduct used to install optical fibre cables by blowing technique for the mechanical property - microduct inner clearance test. This document applies to microduct for use in optical fibre cable installation by blowing.
NOTE Throughout the document, the wording “optical cable” can also include optical fibre units, microduct fibre units, etc.
This first edition cancels and replaces Method E31 of the first edition of IEC 60794-1-21 published in 2015, Amendment 1:2020. This edition constitutes a technical revision. edition includes the significant technical changes with respect to IEC 60794‑1‑21:2015/AMD1:2020:
a) Specification of Method E31.

IEC 62541-5:2026 This edition includes the following significant technical changes with respect to the previous edition:
a) Annex B has been removed and used to create IEC 62451-16;
b) Annex C has been removed and used to create IEC 62451-20;
c) currency information model has been added;
d) information model for Interfaces and AddIns has been added;
e) information model for Method Metadata has been added;
f) MaxSessions, MaxSubscriptions, and MaxMonitoredItems have been added to capabilities;
g) information model for ordered list of objects has been added;
h) PortableQualifiedName and PortableNodeId DataTypes have been added;
i) UriString DataType has been added;
j) SemanticVersionString DataType has been added;
k) AssociatedWith Reference Type has been added;
l) ConfigurationVersion Property has been added to NamespaceMetadataType;
m) AuditClientEventType and AuditClientUpdateMethodResultEventType have been added;
n) ModelVersion has been added to NamespaceMetadataType;
o) NoTransparentBackupRedundancyType has been added to support a Primary/Standby use case;
p) BitFieldType and BitFieldDefinitionType have been added.
This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision.

IEC 62541-21:2026 defines the life cycle of Devices and Composites and mechanisms to verify their authenticity, set up their security and maintain their configuration.
The NodeIds of all Nodes described in this standard are only symbolic names. Annex A defines the NamespaceUri for all NodeIds and the actual NodeIds.

IEC 62541-22:2025 specifies an OPC UA Information Model for a basic set of network related components used in other Information Models.
The initial version of this document defines parameter sets for TSN Talkers and Listeners as well as network interfaces and ports as shown in Figure 1. A future version of this document is expected to have a broader scope of other network technologies than Ethernet only.

IEC 60358-1:2025 is available as IEC 60358-1:2025 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60358-1:2025 This part of IEC 60358 applies to:
Coupling capacitors and capacitor dividers, with rated voltage > 1 000 V, connected line to ground with the low-voltage terminal either permanently earthed or connected to devices, for applications listed hereunder and other similar uses.
This document serves as a basic standard for the coupling capacitors and capacitor dividers.

IEC 62541-23:2025 defines ReferenceTypes commonly used in industrial Information Models. They are more specific than the ReferenceTypes in IEC 62541‑3 which are an inherent part of the OPC UA Address Space Model.

IEC TS 63283-2: 2025 has the goal of analyzing the impact of smart manufacturing on the daily operation of an industrial facility. It focusses on the perspective of automation and control of the production system, but also on the supporting processes of ordering, supply chain management, design, engineering and commissioning, operational technology, life cycle management, maintenance management, and resource management.
These recommendations are accomplished on the basis of several carefully selected use cases that are familiar to manufacturing industry. Therefore, each use case is described, followed by an analysis of the possible influence of smart manufacturing and the assessment of the impact on existing and future standardization.
This first edition cancels and replaces the first edition of IEC TR 63283-2 published in 2022. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) additional use cases (Clause 6);
b) clustering of the requirements for standardization (Clause 7);
c) consolidation of the use cases contributing to the cluster “Computing infrastructure” (Clause 8 and Annex D);
d) consolidation of the business context of the use cases (Annex C).

IEC 62541-6:2025 specifies the mapping between the security model described in IEC 62541‑2, the abstract service definitions specified in IEC 62541‑4, the data structures defined in IEC 62541‑5 and the physical network protocols that can be used to implement the OPC UA specification.
This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of support for ECC to UA Secure Conversation;
b) use of the AuthorityKeyIdentifier extension in Certificate Revocation Lists;
c) enhancement of JSON mapping of Unions;
d) addition of Decimal data type encoding.
e) description of ECC keyUsage rules;
f) addition of Media assigned by IANA to UANodeSet definition;
g) addition of requirements for user and issuer Certificates;
h) addition of rules which specify what happens when DateTime precision is lost;
i) addition of rules to allow for the truncation of strings containing embedded nulls.
J) definition of a normative string representation for NodeId, ExpandedNodeId and QualifiedName for JSON mapping.
k) requirement that TAI times be converted to UTC;
l) new possibility to omit Symbol if unknown in JSON encoding;
m) addition of fields needed to support RolePermissions to the UANodeSet

IEC 62541-8:2025 defines the information model associated with Data Access (DA). It particularly includes additional VariableTypes and complementary descriptions of the NodeClasses and Attributes needed for Data Access, additional Properties, and other information and behaviour. The complete address space model, including all NodeClasses and Attributes is specified in IEC 62541‑3. The services to detect and access data are specified in IEC 62541‑4. Annex A specifies how the information received from OPC COM Data Access (DA) Servers is mapped to the Data Access model. This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of a "Quantity Model" which can be referenced from EngineeringUnit Properties. The model defines quantities and assigned units. In addition it provides alternative units and the conversion to them.
b) addition of rules for ValuePrecision Property:
- can also be used for other subtypes like Duration and Decimal.
- rules have been added when ValuePrecision has negative values.

IEC 60966-4-4:2025, which is a Detail Specification, relates to multi-channel semi-rigid cable assemblies composed of type 50-5 semi-rigid coaxial cables with foamed polyethylene dielectric (see Annex A) and connectors such as type 7-16 (IEC 61169-4), type 4.1-9.5 (IEC 61169-11), type N (IEC 61169-16), type S7-16 (IEC 61169-53), type 4.3-10 (IEC 61169-54), type L32 (IEC 63138-4), type 2.2-5 (IEC 61169-66), type NEX10 (IEC 61169-71), type MQ4 (IEC 63138-2) or type MQ5 (IEC 63138-3). It gives subfamily detail requirements and severities.
This document applies to the semi-rigid cable assemblies for mobile communication, in particular for the cable assemblies used between main feeder and antennas or between main feeder and equipment system or between remote radio heads and antennas. The operating frequency is up to 6 000 MHz.

IEC 60749-26:2025 establishes the procedure for testing, evaluating, and classifying components and microcircuits in accordance with their susceptibility (sensitivity) to damage or degradation by exposure to a defined human body model (HBM) electrostatic discharge (ESD). The purpose of this document is to establish a test method that will replicate HBM failures and provide reliable, repeatable HBM ESD test results from tester to tester, regardless of component type. Repeatable data will allow accurate classifications and comparisons of HBM ESD sensitivity levels. ESD testing of semiconductor devices is selected from this test method, the machine model (MM) test method (see IEC 60749‑27) or other ESD test methods in the IEC 60749 series. Unless otherwise specified, this test method is the one selected.
This edition includes the following significant technical changes with respect to the previous edition:
a) new definitions have been added;
b) text has been added to clarify the designation of and allowances resulting from “low parasitics”. The new designation includes the maximum number of pins of a device that can pass the test procedure.

IEC 62541-11: 2025 defines the Information Model associated with Historical Access (HA). It particularly includes additional and complementary descriptions of the NodeClasses and Attributes needed for Historical Access, additional standard Properties, and other information and behaviour. The complete AddressSpace Model including all NodeClasses and Attributes is specified in IEC 62541‑3. The predefined Information Model is defined in IEC 62541‑5. The Services to detect and access historical data and events, and description of the ExtensibleParameter types are specified in IEC 62541‑4. This document includes functionality to compute and return Aggregates like minimum, maximum, average etc. The Information Model and the concrete working of Aggregates are defined in IEC 62541‑13. Conventions for Historical Access Clients are informatively provided in Annex A.
This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) a functionality has been added to support retrieving of modified events;
b) an Event has been added to indicate when a backfill occurred;
c) a new ReferenceType that can be used to indicate an external node has been defined;
d) the text has been improved to better explain the concept of annotation and remove conflicting explanations;
e) a default historian configuration (and where to find it) has been defined;
f) HistoricalEventConfigurationType, which provides general configuration information about the historical Event storage, has been added;
g) the text has been updated and optional fields have been added to HA configuration object to allow configuration to be defined for periodic data collection, not just for exception-based collection;
h) an ObjectType that can be used for external event collection has been provided as well as an example how historians can be configured.

IEC 61800-9-2:2023 specifies energy efficiency indicators of power electronics (complete drive modules (CDM), input or output sub drive modules (SDM), power drive systems (PDS) and motor starters, all used for motor driven equipment.
It defines IE and IES classes, their limit values and provides test procedures for the classification of the overall losses of the motor system.
Furthermore, this document proposes a methodology for the implementation of the best energy efficiency solution of drive systems. This depends on the architecture of the motor driven system, on the speed/torque profile and on the operating points over time of the driven load equipment. It provides a link for the energy efficiency evaluation and classification of the extended product.
This edition includes the following significant technical changes with respect to the previous edition:
a) Additional IES Classes defined to IES5;
b) Removed reference motor loss data and now point to IEC 60034-30-2;
c) Expanded and modified factors in Clause 6 for CDMs;
d) Annex C is now the Mathematical Model for CDM Losses;
e) Moved the mathematical model for the CDM to Annex C;
f) Added Sub Drive Input Module and Sub Drive Output Modules to Annex B;
g) Annex D is now the Converter Topology (old Annex C);
h) Annex E is now the Interpolation of Motor Losses (Old Annex D);
i) Annex E expanded to include various motor connections and updated interpolation method;
j) New Annex E for determination of Interpolation Coefficients;
k) Annex F is the old Annex E;
l) New Annex J Explanation of Correction Factors for the Reference Losses in Table 8.

IEC 62271-208:2025 gives practical guidance for the evaluation and documentation of the external steady state power-frequency electromagnetic fields which are generated by HV switchgear and controlgear assemblies and prefabricated substations. Basic requirements to measure or calculate the electric and magnetic fields are summarised for assemblies covered by IEC 62271-200 and IEC 62271-201, and for prefabricated substations covered by IEC 62271-202.
NOTE 1 The methods described in this document refer to three-phase equipment. However, the methodology can be used correspondingly for any single- or multi-phase equipment covered by this document.
This document applies to equipment rated for voltages above 1 kV up to and including 52 kV and power-frequencies from 15 Hz to 60 Hz. The electromagnetic fields which are generated by harmonics or transients are not considered in this document. However, the methods described are equally applicable to the harmonic fields of the power-frequency.
Detailed generic information on requirements and measurements of low-frequency electromagnetic fields is given in IEC 61786-1 and IEC 61786-2.
This document covers evaluation under factory or laboratory conditions before installation. The electric and the magnetic fields can be evaluated either by measurements or by calculations.
NOTE 2 Where practicable, the methods described in this document can also be used for installations on site.
It is not within the scope of this document to specify limit values of electromagnetic fields or methods for the assessment of human exposure.

IEC 62541-3: 2025 describes the OPC Unified Architecture (OPC UA) AddressSpace and its Objects. This specification is the OPC UA meta model on which OPC UA information models are based. This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of the concept and modelling elements for Interfaces and AddIns;
b) addition of Currency;
c) addition of Method Meta Data to define additional attributes for Method Arguments;
d) addition of ApplyRestrictionToBrowse bit to AccessRestrictionType;
e) addition of a Non-Volatile Storage bit to AccessLevelExType;
f) addition of a Constant bit and ConfigurationConstant bit to AccessLevelExType;
g) the View NodeClass has been changed to define the EventNotifier as an EventNotifierType in the same way the Object NodeClass defines it;
h) correctition of HasNotifier, HasEventSource, and Organizes, to include ObjectType as valid source node;
i) NamingRules have become deprecated;
j) addition of AssociatedWith ReferenceType.

IEC 62541-12:2025 specifies how OPC Unified Architecture (OPC UA) Clients and Servers interact with DiscoveryServers when used in different scenarios. It specifies the requirements for the LocalDiscoveryServer, LocalDiscoveryServer-ME and GlobalDiscoveryServer. It also defines information models for Certificate management, KeyCredential management and AuthorizationServices.
Annex A informatively discusses deployment and configuration aspects.
Annex B defines NodeSet and numeric NodeIds.
Annex F provides installation rules for the LDS.
Annex H compares the Certificate management defined in this document with IETF RFC 7030.
This second edition cancels and replaces the first edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of a "Quantity Model" which can be referenced from EngineeringUnit Properties. The model defines quantities and assigned units. In addition it provides alternative units and the conversion to them;
b) addition of rules for ValuePrecision Property:
• can also be used for other subtypes like Duration and Decimal.
• additional rules when ValuePrecision has negative values.

IEC 62541-20:2025 defines an Information Model. The Information Model describes the basic infrastructure to model file transfers.
NOTE In the previous version, File Transfer was in IEC 62541‑5:2020, Annex C.

IEC 61800-5-1:2022 specifies requirements for adjustable speed electrical power drive systems (PDS) or their elements, with respect to electrical, thermal, fire, mechanical, energy and other relevant hazards. It does not cover the driven equipment except for interface requirements. It applies to adjustable speed electrical PDS which include the power conversion, basic drive module (BDM)/complete drive module (CDM) control, and a motor or motors.
Excluded are traction and electric vehicle BDM/CDM.
It applies to low-voltage adjustable speed electrical PDS intended to feed a motor or motors from a BDM/CDM connected to phase-to-phase voltages of up to and including 1,0 kV AC (50 Hz or 60 Hz) and up to and including 1,5 kV DC. It also applies to high-voltage adjustable speed electrical PDS intended to feed a motor or motors from a BDM/CDM connected to phase-to-phase voltages of up to and including 35 kV AC (50 Hz or 60 Hz) and up to and including 52 kV DC.
This document also applies to PDS which intentionally emits or receives radio waves for the purpose of radio communication.
This edition includes the following significant technical changes with respect to the previous edition:
a) harmonization with IEC 62477-1:2022;
b) harmonization with UL 61800-5-1 and CSA C22.2 No. 274, including an annex with a list of national deviation which was considered not possible to harmonize within a reasonable timeframe;
c) more detailed information about the evaluation of components according to this document and relevant safety component standards;
d) updated requirement for mechanical hazards including multiple IP ratings.
The contents of the corrigendum 1 (2023-09) have been included in this copy.

IEC PAS 62443-1-6:2025 introduces new communication channels, a new organization of functions, and new cybersecurity concerns. Asset owners are looking for more guidance in how to deal with all these changes. The IEC 62443 series, Security for industrial automation and control systems, can be applied to this new technology, but many asset owners look at the scope of the series and wonder where to start.
This part of IEC 62443 seeks to give guidance to asset owners and their service providers on how the IEC 62443 series can be used to address IIoT. The document points to requirements in the different parts of the IEC 62443 series that might be helpful to the asset owner as they both consider implementing IIoT in their automation solutions as well as dealing with existing IIoT. Product suppliers and service providers can find this document useful as well.
NOTE The drafting committee for IEC 62443 is currently engaged in revision of parts of the standard to recognize emerging technologies, such as IIoT, and this document is part of that on-going effort.
NOTE In accordance with ISO/IEC Directives, Part 1, IEC PASs are automatically withdrawn after 4 years.

IEC 62590-2-1:2025 This document includes the following significant technical changes with respect to IEC 62589 and the former IEC 62590:
a) Reduction of the requirements for uncontrolled rectifiers only;
b) Interface model for the different systems connected;
c) Energy efficiency addressed.
This part of IEC 62590 describes functions and working principles, specifies requirements, interfaces and test methods of uncontrolled rectifiers for DC electric traction power supply systems. Uncontrolled rectifiers connect a 3AC power network with a DC electric traction system with a unidirectional power flow using diode assemblies.
The coordination between the transformer and the rectifier diode assembly is included.
This document applies to fixed installations of following electric traction power supply systems:
• railway networks;
• metropolitan transport networks including metros, tramways, trolleybuses and fully automated transport systems, magnetic levitated transport systems, electric road systems.
This first edition of IEC 62590-2-1, in conjunction with the other parts of the IEC 62590 series, cancels and replaces the first edition of IEC 62589 published in 2010 and the second edition of IEC 62590 published in 2019.

IEC 60092-378:2024 is applicable to shipboard and offshore optical fibre cables, intended for fixed installations.
Cables designed to maintain functional integrity during fire given in 6.1 and to be installed in explosive atmospheres given in 6.2 are included.
The various types of optical fibre cables are given in Clause 6. The constructional requirements and test methods are aligned with those indicated in IEC 60092‑350, unless otherwise specified in this document.

IEC 63541:2025 applies to lithium tantalate (LT) and lithium niobate (LN) crystals for surface acoustic wave devices, including the as-grown crystals and lumbered crystals.

IEC 62541-1:2025 presents the concepts and overview of the OPC Unified Architecture (OPC UA). Reading this document is helpful to understand the remaining parts of the IEC 62541 series. Each of the other parts is briefly explained along with a suggested reading order. This first edition cancels and replaces IEC TR 62541-1 published in 2020

IEC 62908-12-10:2025 specifies the standard measuring conditions and measurement methods for determining touch and hovering performance of a touch sensor module. This document is applicable to touch sensor modules, whereas the structural relationship between touch sensor, touch controller, touch sensor module, display panel, touch display panel, and touch display module is defined in IEC 62908-1-2. This third edition cancels and replaces the second edition published in 2023. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) added principle of force sensitive touch sensor module and force-output characteristics measurement;
b) added required equipment for force-output characteristic measurement of force sensitive touch sensor module;
c) added test method for force-output characteristics measurement.

IEC 61400-1:2019 specifies essential design requirements to ensure the structural integrity of wind turbines. Its purpose is to provide an appropriate level of protection against damage from all hazards during the planned lifetime. This document is concerned with all subsystems of wind turbines such as control and protection functions, internal electrical systems, mechanical systems and support structures. This document applies to wind turbines of all sizes. For small wind turbines, IEC 61400-2 can be applied. IEC 61400-3-1 provides additional requirements to offshore wind turbine installations. This document is intended to be used together with the appropriate IEC and ISO standards mentioned in Clause 2. This edition includes the following significant technical changes with respect to the previous edition:
a) general update and clarification of references and requirements;
b) extension of wind turbine classes to allow for tropical cyclones and high turbulence;
c) Weibull distribution of turbulence standard deviation for normal turbulence model (NTM);
d) updated design load cases (DLCs), in particular DLC 2.1 and 2.2;
e) revision of partial safety factor specifications
The contents of the corrigendum 1 (2019-09) and Interpretation sheet 1 (2025-02) have been included in this copy.

IEC 60335-2-5:2025 deals with the safety of electric dishwashers for household and similar purposes that are intended for washing and rinsing dishes, cutlery and other utensils, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances including direct current (DC) supplied appliances and battery-operated appliances. Appliances not intended for normal household use but which nevertheless can be a source of danger to the public, such as appliances intended to be used by laypersons in shops, in light industry and on farms, are within the scope of this standard. As far as is practicable, this standard deals with the common hazards presented by appliances that are encountered by all persons in and around the home.
However, in general, it does not take into account
– persons (including children) whose physical, sensory or mental capabilities; or lack of experience and knowledge prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements can be necessary;
– in many countries, additional requirements are specified by the national health authorities, the national authorities responsible for the protection of labour, the national water supply authorities and similar authorities.
This standard does not apply to
– commercial electric dishwashing machines (IEC 60335-2-58);
– appliances intended for industrial purposes;
– appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas).
This seventh edition cancels and replaces the sixth edition published in 2012 and Amendment 1: 2018. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) alignment with IEC 60335-1:2020;
b) modification of some notes or conversion to normative text (Clause 1, 19.101, 20.102);
c) application of test probe 19 (8.1.1, 8.1.3, 20.2, B.22.3, B.22.4);
d) addition of surface temperature limits (Clause 11);
e) addition of testing to evaluate leakage of the rinsing agent reservoir (22.6);
f) addition of requirements to prevent simultaneous operation of multiple loads (22.105, Annex R);
g) addition of requirements for motor running capacitors (24.5, 24.8);
h) updated detergent reference to IEC 60436 and rinse agent reference to 15.2 (15.2, 22.6, Annex AA).
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its amendments unless that edition precludes it; in that case, the latest edition that does not preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.

IEC TR 61169-1-8:2025 provides a test method for voltage standing wave ratio (VSWR, hereinafter) of single RF connector by double-connector method. This document is applicable to single RF cable connectors and single microstrip RF connectors as well as single adapters if an estimation of the VSWR of a single completely installed RF-connector is used and a time domain feature is not available on the vector network analyzer.

IEC 62541-100:2025 defines the information model associated with Devices. This document describes three models which build upon each other as follows:
• The (base) Device Model is intended to provide a unified view of devices and their hardware and software parts irrespective of the underlying device protocols.
• The Device Communication Model adds Network and Connection information elements so that communication topologies can be created.
• The Device Integration Host Model finally adds additional elements and rules required for host systems to manage integration for a complete system. It enables reflecting the topology of the automation system with the devices as well as the connecting communication networks.
This document also defines AddIns that can be used for the models in this document but also for models in other information models. They are:
• Locking model – a generic AddIn to control concurrent access,
• Software update model – an AddIn to manage software in a Device.
This second edition cancels and replaces the first edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) a ComponentType that can be used to model any HW or SW element of a device has been defined and a SoftwareType has been added as subtype of ComponentType;
b) the new OPC UA interface concept and defined interfaces for Nameplate, DeviceHealth, and SupportInfo has been added.
c) a new model for Software Update (Firmware Update) has been added;
d) a new entry point for documents where each document is represented by a FileType instance has been specified;
e) a model that provides information about the lifetime, related limits and semantic of the lifetime of things like tools, material or machines has been added.

IEC 62541-10:2025 defines the Information Model associated with Programs in OPC Unified Architecture (OPC UA). This includes the description of the NodeClasses, standard Properties, Methods and Events and associated behaviour and information for Programs. The complete AddressSpace model including all NodeClasses and Attributes is specified in IEC 62541-3. The Services such as those used to invoke the Methods used to manage Programs are specified in IEC 62541-4. An example for a DomainDownload Program is defined in Annex A. This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
- StateMachine table format has been aligned.

IEC 62541-7: 2025 specifies value and structure of Profiles in the OPC Unified Architecture.
OPC UA Profiles are used to segregate features with regard to testing of OPC UA products and the nature of the testing. The scope of this document includes defining functionality that can only be tested. The definition of actual TestCases is not within the scope of this document, but the general categories of TestCases are covered by this document.
Most OPC UA applications will conform to several, but not all of the Profiles.
This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Profiles and ConformanceUnits are not part of this document, but are solely managed in a public database as described in Clause 1.

IEC 62541-4:2025 defines the OPC Unified Architecture (OPC UA) Services. The Services defined are the collection of abstract Remote Procedure Calls (RPC) that are implemented by OPC UA Servers and called by OPC UA Clients. All interactions between OPC UA Clients and Servers occur via these Services. The defined Services are considered abstract because no particular RPC mechanism for implementation is defined in this document. IEC 62541‑6 specifies one or more concrete mappings supported for implementation. For example, one mapping in IEC 62541‑6 is to UA-TCP UA-SC UA-Binary. In that case the Services described in this document appear as OPC UA Binary encoded payload, secured with OPC UA Secure Conversation and transported via OPC UA TCP. Not all OPC UA Servers implement all of the defined Services. IEC 62541‑7 defines the Profiles that dictate which Services must be implemented in order to be compliant with a particular Profile. A BNF (Backus-Naur form) for browse path names is described in Annex A. This fourth edition cancels and replaces the third edition published in 2020. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of new definitions to Method Call Service to allow optional Method arguments;
b)addition of reference to SystemStatusChangeEventType for event monitored item error scenarios;
c) enhancement of the general description of how determining if a Certificate is trusted;
d) addition of support for ECC;
e) addition of revisedAggregateConfiguration to AggregateFilterResult structure;
f) addition of INVALID to the BrowseDirection enumeration data type;
g) addition of INVALID to the TimestampsToReturn enumeration data type;
h) addition of definitions that make sure the subscription functionality works if retransmission queues are optional;
i) addition of client checks has been added to be symmetric to the Server Certificate check has been added;
j) clarification that ‘local’ top level domain is not appended by server into certificate and not checked by client when returned from LDS-ME;
k) addition of a definition for expiration behaviour of IssuedIdentityTokens;
l) addition of status code Good_PasswordChangeRequired to ActivateSession;
m) restriction of AdditionalInfo to servers in debug mode;
n) addition of new status code Bad_ServerTooBusy;
o) addition of definition for cases where server certificate must be contained in GetEndpoints response.

IEC TS 62607-6-27:2025, which is a Technical Specification, establishes a standardized method to determine the key control characteristic
• field-effect mobility
for semiconducting two-dimensional (2D) materials by the
• field-effect transistor (FET) method.
For two-dimensional semiconducting materials, the field-effect mobility is determined by fabricating a FET test structure and measuring the transconductance in a four-terminal configuration.
- This method can be applied to layers of semiconducting two-dimensional materials, such as graphene, black phosphorus (BP), molybdenum disulfide (MoS₂), molybdenum ditelluride (MoTe₂), tungsten disulfide (WS₂), and tungsten diselenide (WSe₂).
- The four-terminal configuration improves accuracy by eliminating parasitic effects from the probe contacts and cables

IEC TS 63414:2025 is applicable for the determination of the AC and DC pollution flashover and withstand voltage characteristics of insulators with polymeric housing, to be used outdoors in HV applications and exposed to polluted environments. This is also applicable for insulators with hydrophobic coatings. This document refers to AC systems with a rated voltage greater than 1 000 V and DC systems with a rated voltage greater than 1 500 V.
The object of this technical specification is to prescribe standardized test methods, requirements and procedures for artificial pollution tests applicable to polymeric insulators for overhead lines including traction lines, station post and hollow insulators of equipment. Available test experience with polymeric station post and hollow insulators, especially for DC applications, is limited.
The proposed tests are not applicable to ceramic and glass insulators without polymeric housing, to greased insulators or to special types of insulators (e.g., insulators with semiconducting glaze).
Differently to ceramic and glass insulators without polymeric housing:
- The pollution performance of insulators with polymeric housing varies with the hydrophobicity condition of the surface. The specific conditions simulated by standardized tests might not represent the actual dynamic field conditions.
- The determination of the flashover and/or withstand voltage under pollution conditions is not enough for dimensioning. Additional constraints related to possible ageing are also to be considered.
- If the Hydrophobicity Transfer Material (HTM) test according to IEC TR 62039 confirms that an insulator is non-HTM, it can be tested according to IEC 60507 or IEC TS 61245.

IEC 61757-1-4:2025 defines the terminology, structure, and measurement methods of distributed fibre optic sensors for absolute strain measurements based on spectral correlation analysis of Rayleigh backscattering signatures in single-mode fibres, where the fibre is the distributed strain measurement element in a measurement range from about 10 m to tens of km. This document also applies to hybrid sensor systems that combine the advantages of Brillouin and Rayleigh backscattering effects to obtain optimal measurement quality. This document also specifies the most important features and performance parameters of these distributed fibre optic strain sensors defines procedures for measuring these features and parameters. This part of IEC 61757 does not apply to point measurements or to dynamic strain measurements. Distributed strain measurements using Brillouin scattering in single-mode fibres are covered in IEC 61757-1-2. The most relevant applications of this strain measurement technique are listed in Annex A, while Annex B provides a short description of the underlying measurement principle.