prEN IEC 63758-6:2026

• Status: Not Published
• Publication Date: 23-Feb-2028
• Technical Committee: CLC/TC 100X - Audio, video and multimedia systems and equipment and related sub-systems
• Current Stage: 4020 - Enquiry circulated - Enquiry
• Start Date: 18-Sep-2026
• Completion Date: 18-Sep-2026
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Mandate: M/607 - COMMISSION IMPLEMENTING DECISION of C(2025)1207 on a Standardisation Request M/607 as regards charging interface and charging communication protocol for radio equipment capable of being recharged by means of wireless charging in relation with Article 3(4), sixth subparagraph, of Directive 2014/53/EU of the European Parliament and of the Council.
• Ref Project: oSIST prEN IEC 63758-6:2026 - Qi Specification - Version 2.3 - Part 6: Mechanical, thermal, user interface (Fast Track)

prEN IEC 63758-6:2026 is a CENELEC/IEC Fast Track draft for the Qi Specification, Version 2.3, Part 6, covering mechanical, thermal, and user interface aspects of wireless power transfer. It specifies basic physical design requirements and guidelines for Power Transmitter Product and Power Receiver Product designs, including dimensions, alignment, interface-surface temperature rise, and user indications. It is intended for engineers, designers, compliance teams, and test labs working on Qi charging hardware.

What does prEN IEC 63758-6:2026 specify?

prEN IEC 63758-6:2026 specifies the physical and user-facing parts of Qi wireless power transfer products. It focuses on how a Power Transmitter Product and a Power Receiver Product should be built and how they should communicate their state to the user.

The document is organized into five clauses:

• Clause 1 - General: structure of the Qi Specification, scope, compliance, references, and conventions.
• Clause 2 - PowerReceiver design requirements.
• Clause 3 - Mechanical design guidelines, marked as informative.
• Clause 4 - Interface Surface temperature rise.
• Clause 5 - User Interface requirements.

Clause 3 is informative, so it gives guidance rather than mandatory requirements. In practice, that helps designers align products for a better charging experience without treating every recommendation as a pass-fail rule.

What are the key requirements of prEN IEC 63758-6:2026?

prEN IEC 63758-6:2026 sets the main physical and user-interface expectations for Qi transmitter and receiver products. The most important requirements are concentrated in Clauses 2, 4, and 5, with design guidance in Clause 3.

PowerReceiver construction

Clause 2 says a Power Receiver design shall include a Secondary Coil and an Interface Surface. The distance from the Secondary Coil to the Interface Surface shall not exceed 2.5 mm across the bottom face of the coil. This matters because coil placement affects coupling, thickness, and how easily the product can charge on the transmitter.

Mechanical size and alignment guidance

Clause 3 gives informative guidance for product shape, size, marking, and alignment aids. It covers Baseline Power Profile and Extended Power Profile sizes, and it recommends marking the Active Area on both transmitter and receiver products. For standalone transmitters, the Active Area is centered on the Interface Surface. In practice, this guidance helps users place devices correctly and reduces missed alignment.

Alignment aids

Clause 3 recommends alignment aids such as a movable Active Area, visual marking, lighting, audible signals, tactile feedback, and a visual response on the receiver. This means designers can choose the cues that best fit the product form factor, but the product should help the user line up the devices clearly.

Interface Surface temperature rise

Clause 4 requires the Power Transmitter Product to limit the top surface temperature of the test receiver to at most 12 °C above ambient during a 1 hour test under shielded conditions. It also recommends a 5 °C limit. This is important for safety, comfort, and product validation during thermal testing.

User indications from the transmitter

Clause 5.1 says a Power Transmitter Product should indicate placement of a Power Receiver Product or object within 0.5 s, charging state, completion, errors or faults, reduced-rate charging for the Extended Power Profile, and Foreign Object detection. If the transmitter supports multiple receivers, it should indicate each condition for each receiver. If it takes input power from a USB Micro-B/Micro-AB or USB-C receptacle, it should warn when requested power may not be available.

User indications from the receiver

Clause 5.2 says a Power Receiver Product should indicate successful reception of the Power Signal within 3 s after placement on a transmitter, and it should indicate when reception ends. That gives the user direct feedback that charging has started or stopped.

What terms does prEN IEC 63758-6:2026 define?

• Wireless Power Consortium (WPC) - The organization that develops and promotes the Qi Specification.
• Power Transmitter Product - The Qi product that presents the Interface Surface and supplies wireless power.
• Power Receiver Product - The Qi product placed on the transmitter to receive wireless power.
• Interface Surface - The surface where the Power Receiver Product is placed.
• Active Area - The area on the transmitter or receiver associated with effective power transfer.
• Secondary Coil - The receiver coil used to pick up transmitted power.
• Baseline Power Profile - A Qi power profile used as a reference point for size and user-interface guidance.
• Extended Power Profile - A Qi power profile that has its own size and user-feedback guidance in this document.

Who uses prEN IEC 63758-6:2026?

prEN IEC 63758-6:2026 is used by product designers, mechanical engineers, thermal engineers, UX engineers, compliance teams, and test laboratories working on Qi wireless charging products. It is relevant to flat-surface devices such as mobile phones and chargers, and to other products mentioned in the document such as headsets and digital still cameras.

Buyers and quality managers use it to judge whether a Qi wireless charging design has the expected interface layout, temperature behavior, and user indications. It is also useful when comparing transmitter and receiver designs for fit, placement, and usability.

Which standards are used with prEN IEC 63758-6:2026?

prEN IEC 63758-6:2026 uses ISO/IEC Directives, Part 2 for the wording of requirements, recommendations, permissions, and capabilities. The document also depends on other Qi Specification parts named in its structure, especially Communications Protocol, Compliance Testing, and the wider Qi system documents.

The temperature-rise clause refers to test receivers defined in Compliance Testing. The shorthand notation for data packets is tied to the Communications Protocol document, which gives the meanings of the packet mnemonics and modifiers.

What does the prEN IEC 63758-6:2026 document contain?

The document contains a compliance table for verbal forms, conventions for numbers and tolerances, and rules for data-packet fields and text strings. It also includes an example table and figure for interpreting data-packet fields, plus a figure showing the Secondary Coil assembly.

Clause 3 contains informative mechanical guidance for transmitter and receiver products, including alignment aids and marking of the Active Area. Clause 5 lists the user indications that transmitter and receiver products should provide. These parts are useful for design reviews, implementation, and test planning because they turn the Qi user experience into checkable product behavior.

SLOVENSKI STANDARD
01-november-2026
Specifikacija Qi - Različica 2.3 - 6. del: Mehanski, termični in uporabniški vmesnik
(hitri postopek)
Qi Specification - Version 2.3 - Part 6: Mechanical, thermal, user interface (Fast Track)
Ta slovenski standard je istoveten z: prEN IEC 63758-6:2026
ICS:
29.240.99 Druga oprema v zvezi z Other equipment related to
omrežji za prenos in power transmission and
distribucijo električne energije distribution networks
33.160.99 Druga avdio, video in Other audio, video and
avdiovizuelna oprema audiovisual equipment
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

100/4549/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63758-6 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2026-09-18 2026-12-11
SUPERSEDES DOCUMENTS:
IEC TC 100 : AUDIO, VIDEO AND MULTIMEDIA SYSTEMS AND EQUIPMENT
SECRETARIAT: SECRETARY:
Japan Ms Mahiru Uehara
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 106,TC 108
ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they
are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Qi Specification - Version 2.3 - Part 6: Mechanical, thermal, user interface (Fast Track)

PROPOSED STABILITY DATE: 2029
NOTE FROM TC/SC OFFICERS:
As this is a fast-track process offered by WPC, the Word file is not provided.

electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

QiSpecification
Mechanical,Thermal,User
Interface
Version2.3
PublishDate:08December2025
DISCLAIMER
Theinformationcontainedhereinisbelievedtobeaccurateasofthedateofpublication,butisprovided“asis”andmay
containerrors.TheWirelessPowerConsortiummakesnowarranty,expressorimplied,withrespecttothisdocument
anditscontents,includinganywarrantyoftitle,ownership,merchantability,orfitnessforaparticularuseorpurpose.
NeithertheWirelessPowerConsortium,noranymemberoftheWirelessPowerConsortiumwillbeliableforerrorsin
thisdocumentorforanydamages,includingindirectorconsequential,fromuseoforrelianceontheaccuracyofthis
document.Foranyfurtherexplanationofthecontentsofthisdocument,orincaseofanyperceivedinconsistencyor
ambiguityofinterpretation,contact:[e-mail].

Contents
1. General 4
1.1 StructureoftheQi Specification 4
1.2 Scope 5
1.3 Compliance 5
1.4 References 5
1.5 Conventions 6
1.5.1 Notationofnumbers 6
1.5.2 Tolerances 6
1.5.3 Fieldsinadatapacket 6
1.5.4 Notationoftextstrings 7
1.5.5 Short-handnotationfordatapackets 7
2. PowerReceiverdesignrequirements 8
3. Mechanicaldesignguidelines(Informative) 9
3.1 PowerTransmitterProduct 9
3.2 PowerReceiverProduct 9
3.3 PowerTransmitterProductAlignmentAid 9
3.4 PowerReceiverProductAlignmentAid 9
4. InterfaceSurfacetemperaturerise 11
5. UserInterfacerequirements 12
5.1 UserinteractionwithaPowerTransmitterProduct 12
5.2 UserinteractionwithaPowerReceiverProduct 12

1. General
TheWirelessPowerConsortium(WPC)isaworldwideorganizationthataimstodevelopandpromoteglobalstandards
forwirelesspowertransferinvariousapplicationareas.Animportantapplicationareacomprisesflat-surfacedevices
suchasmobilephonesandchargersoperatingatpowerlevelsupto25W.
1.1 StructureoftheQi Specification
Generaldocuments
l
Introduction
l
Glossary,Acronyms,andSymbols
l
TechnicalSystemOverview
l
PowerProfiles
Systemdescriptiondocuments
l
Mechanical,Thermal,andUserInterface
l
PowerDelivery
l
CommunicationsPhysicalLayer
l
CommunicationsProtocol
l
ForeignObjectDetection
l
NFCTagProtection
l
AuthenticationProtocol
l
MPPCommunicationsProtocol
l
MPPMagneticsDesign
l
MPP PowerDelivery
l
MPP CommunicationsPhysicalLayer
l
MPP ForeignObjectDetection
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MPP DesignGuidelines(Informative)
l
MagneticCovers
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ActiveAlignmentSystem
l
ThermalManagementProtocol
1.2 Scope
TheQiSpecification,Mechanical,Thermal,andUserInterface(thisdocument)identifiesbasicphysicaldesign
requirementsandguidelinesforPowerTransmitterandPowerReceiverProducts,includingproductandsystem
dimensions,alignmentoftheproducts,surfacetemperaturerise,andindicationstotheuser.
1.3 Compliance
AllprovisionsintheQiSpecificationaremandatory,unlessspecificallyindicatedasrecommended,optional,note,
example,orinformative.VerbalexpressionofprovisionsinthisSpecificationfollowtherulesprovidedinISO/IEC
Directives,Part2.
Table1-Verbalformsforexpressionsofprovisions
Provision Verbalform
requirement “shall”or“shallnot”
recommendation “should”or“shouldnot”
permission “may”or“maynot”
capability “can”or“cannot”
1.4 References
Forundatedreferences,themostrecentlypublisheddocumentapplies.ThemostrecentWPCpublicationscanbe
downloadedfromhttp://www.wirelesspowerconsortium.com.

1.5 Conventions
1.5.1 Notationofnumbers
l
Realnumbersusethedigits0to9,adecimalpoint,andoptionallyanexponentialpart.
l
Integernumbersindecimalnotationusethedigits0to9.
l
Integernumbersinhexadecimalnotationusethehexadecimaldigits0to9andAtoF,andareprefixedby"0x"
unlessexplicitlyindicatedotherwise.
l
SinglebitvaluesusethewordsZEROandONE.
1.5.2 Tolerances
Unlessindicatedotherwise,allnumericvaluesintheQiSpecificationareexactlyasspecifiedanddonothaveany
impliedtolerance.
1.5.3 Fieldsinadatapacket
Anumericvaluestoredinafieldofadatapacketusesabig-endianformat.Bitsthataremoresignificantarestoredata
lowerbyteoffsetthanbitsthatarelesssignificant.Table2andFigure1provideexamplesoftheinterpretationofsuch
fields.
Table2-Exampleoffieldsinadatapac
...