Qi Specification version 2.0 - Part 3: Mechanical, Thermal, and User Interface

IEC 63563-3:2025 identifies basic physical design requirements and guidelines for Power Transmitter and Power Receiver Products, including product and system dimensions, alignment of the products, surface temperature rise, and indications to the user.

Qi Spezifikation Version 2.0 - Teil 3: Mechanische und thermische Anwender-Schnittstelle

Spécification Qi version 2.0 - Partie 3: Interface mécanique, thermique et utilisateur

IEC 63563-3:2025 identifie les exigences et lignes directrices de base en matière de conception physique pour les produits émetteurs et récepteurs de puissance, y compris les dimensions du produit et du système, l'alignement des produits, l'élévation de la température de surface et les indications destinées à l'usager.

Različica specifikacije Qi 2.0 - 3. del: Mehanski, termični in uporabniški vmesnik (IEC 63563-3:2025)

General Information

Status
Published
Publication Date
27-Mar-2025
Current Stage
6060 - Document made available - Publishing
Start Date
28-Mar-2025
Completion Date
28-Mar-2025

Overview

EN IEC 63563-3:2025 - Qi Specification version 2.0, Part 3: Mechanical, Thermal, and User Interface (CLC adoption of IEC 63563-3) defines the physical design requirements and human‑interface guidelines for wireless power products. It covers basic mechanical dimensions, alignment aids, interface surface temperature rise, and user feedback/indications for Power Transmitter and Power Receiver products implementing the Qi 2.0 specification (Wireless Power Consortium).

Key scope items:

  • Product and system dimensions and form‑factor guidelines
  • Secondary coil and interface surface requirements
  • Alignment aids and active area marking
  • Surface temperature limits during power transfer
  • User interface and indication timing/behaviour
  • Mandatory vs recommended provisions and compliance language

Key Topics and Requirements

  • Mechanical design: Recommended transmitter interface surface sizes - at least 107 × 177 mm for Baseline Power Profile (BPP) and 439 × 329 mm for Extended Power Profile (EPP). Power Receiver X/Y dimensions are similarly constrained for optimized coupling; interface surfaces should be flat and marked to show Active Area location.
  • Secondary coil placement: The distance from the Secondary Coil to the Power Receiver Interface Surface shall not exceed 2.5 mm.
  • Alignment aids: Recommended alignment features include movable active areas, visual markings or lighting, audible/tactile signals and transmitter-side centering of Active Areas to improve user experience and coupling efficiency.
  • Thermal limits: The transmitter shall limit the top surface temperature of the Test Power Receiver to at most 12 °C above ambient during a 1‑hour control-point test (recommendation: ≤5 °C for better user comfort).
  • User interface & indications: Fast and clear feedback is required - e.g., indication within 0.5 seconds when a receiver or object is placed, status for charging in progress/complete, error or foreign object detection, and per‑device status when multiple receivers are supported.
  • Compliance language: Uses ISO/IEC directive verbal forms - “shall” for requirements, “should” for recommendations, etc.

Applications and Who Uses It

This standard is essential for:

  • Product designers and mechanical engineers building wireless charging pads, in‑vehicle chargers, and embedded transmitters
  • OEMs and accessory manufacturers of smartphones, wearables, headsets, and other Qi‑enabled devices (power receivers)
  • Compliance and test laboratories assessing mechanical and thermal behavior of Qi products
  • User experience (UX) designers implementing alignment feedback and status indications
  • Regulatory and standards teams harmonizing safety, EMC, and thermal compliance with wireless power guidelines

Implementing EN IEC 63563-3 helps ensure consistent user experience, safe surface temperatures, and interoperable mechanical interfaces across Qi‑certified wireless charging ecosystems.

Related Standards

  • Qi Specification - Communications Protocol and Physical Layer
  • Qi Specification - Power Delivery
  • Qi Specification - Foreign Object Detection (FOD)
  • Compliance testing documents and reference designs from the Wireless Power Consortium (WPC)

Keywords: Qi 2.0, EN IEC 63563-3, wireless power, wireless charging, power transmitter, power receiver, interface surface, alignment aid, temperature rise, user interface, compliance.

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EN IEC 63563-3:2026

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Frequently Asked Questions

EN IEC 63563-3:2025 is a standard published by CLC. Its full title is "Qi Specification version 2.0 - Part 3: Mechanical, Thermal, and User Interface". This standard covers: IEC 63563-3:2025 identifies basic physical design requirements and guidelines for Power Transmitter and Power Receiver Products, including product and system dimensions, alignment of the products, surface temperature rise, and indications to the user.

IEC 63563-3:2025 identifies basic physical design requirements and guidelines for Power Transmitter and Power Receiver Products, including product and system dimensions, alignment of the products, surface temperature rise, and indications to the user.

EN IEC 63563-3:2025 is classified under the following ICS (International Classification for Standards) categories: 29.240.99 - Other equipment related to power transmission and distribution networks; 35.240.99 - IT applications in other fields. The ICS classification helps identify the subject area and facilitates finding related standards.

EN IEC 63563-3:2025 is associated with the following European legislation: EU Directives/Regulations: 2014/53/EU; Standardization Mandates: M/607. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

EN IEC 63563-3:2025 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-marec-2026
Različica specifikacije Qi 2.0 - 3. del: Mehanski, termični in uporabniški vmesnik
(IEC 63563-3:2025)
Qi Specification version 2.0 - Part 3: Mechanical, thermal, and user interface (IEC 63563
-3:2025)
Qi Spezifikation Version 2.0 - Teil 3: Mechanische und thermische Anwender-
Schnittstelle
Spécification Qi version 2.0 - Partie 3: Interface mécanique, thermique et utilisateur
Ta slovenski standard je istoveten z: EN IEC 63563-3:2025
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.

EUROPEAN STANDARD EN IEC 63563-3

NORME EUROPÉENNE
EUROPÄISCHE NORM March 2025
ICS 29.240.99; 35.240.99
English Version
Qi Specification version 2.0 - Part 3: Mechanical, Thermal, and
User Interface
(IEC 63563-3:2025)
Spécification Qi version 2.0 - Partie 3: Interface mécanique, Qi Spezifikation Version 2.0 - Teil 3: Mechanische und
thermique et utilisateur thermische Anwender-Schnittstelle
(IEC 63563-3:2025) (IEC 63563-3:2025)
This European Standard was approved by CENELEC on 2025-03-17. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63563-3:2025 E

European foreword
The text of document 100/4256/FDIS, future edition 1 of IEC 63563-3, prepared by TC 100/Technical
Area 15 "Wireless Power Transfer" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 63563-3:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-03-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-03-31
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 63563-3:2025 was approved by CENELEC as a European
Standard without any modification.

IEC 63563-3 ®
Edition 1.0 2025-02
INTERNATIONAL
STANDARD
Qi Specification version 2.0 –

Part 3: Mechanical, Thermal, and User Interface

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.240.99; 35.240.99 ISBN 978-2-8327-0186-7

 ,(&‹,(&
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
QI SPECIFICATION VERSION 2.0 –
Part 3: Mechanical, Thermal, and User Interface
FOREWORD
 The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprisingall
national electrotechnical committees (IEC National Committees). The object of IEC is to promote internationalco-
operation on all questions concerning standardization in the electrical and electronic fields. To this end andin addition
to other activities, IEC publishes International Standards, Technical Specifications, TechnicalReports, Publicly
Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Theirpreparation is entrusted to
technical committees; any IEC National Committee interested in the subject dealt withmay participate in this
preparatory work. International, governmental and non-governmental organizationsliaising with the IEC also
participate in this preparation. IEC collaborates closely with the InternationalOrganization for Standardization
(ISO) in accordance with conditions determined by agreement between the twoorganizations.
 The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
 IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
 In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence betweenany IEC
Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
 IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
 All users should ensure that they have the latest edition of this publication.
 No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage orother
damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) andexpenses
arising out of the publication, use of, or reliance upon, this IEC Publication or any other IECPublications.
 Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
 IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights inrespect
thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s),which may be
required to implement this document. However, implementers are cautioned that this may notrepresent the latest
information, which may be obtained from the patent database available athttps://patents.iec.ch. IEC shall
not be held responsible for identifying any or all such patent rights.
IEC 635-3 has been prepared by technical area 15: Wireless Power Transfer, of IEC
technical committee 100: Audio, video and multimedia systems and equipment. It is an
International Standard.
It is based on Qi Specification version 2.0, Mechanical, Thermal, and User Interface and was
submitted as a Fast-Track document.
The text of this International Standard is based on the following documents:
Draft Report on voting
//FDIS //RVD
,(&‹,(& 
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
The structure and editorial rules used in this publication reflect the practice of the organization
which submitted it.
This document was developed in accordance with ISO/IEC Directives, Part 1 and ISO/IEC
Directives, IEC Supplement available at www.iec.ch/members_experts/refdocs. The main
document types developed by IEC are described in greater detail at www.iec.ch/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
x reconfirmed,
x withdrawn, or
x revised.
 ,(&‹,(&
WIRELESS POWER
CONSORTIUM
Qi Specification
Mechanical, Thermal, and User
Interface
Version 2.0
April 2023
,(&‹,(& 
DISCLAIMER
Theinformationcontainedhereinisbelievedtobeaccurateasofthedateofpublication,
butisprovided“asis”andmaycontainerrors.TheWirelessPowerConsortiummakesno
warranty,expressorimplied,withrespecttothisdocumentanditscontents,includingany
warrantyoftitle,ownership,merchantability,orfitnessforaparticularuseorpurpose.
NeithertheWirelessPowerConsortium,noranymemberoftheWirelessPower
Consortiumwillbeliableforerrorsinthisdocumentorforanydamages,includingindirect
orconsequential,fromuseoforrelianceontheaccuracyofthisdocument.For any further
explanation of the contents of this document, or in case of any perceived inconsistency or ambiguity
of interpretation, contact: info@wirelesspowerconsortium.com.
RELEASE HISTORY
Specification Version Release Date Description
2.0 April 2023 Initial release of the v2.0 Qi Specification.

 ,(&‹,(&
Table of Contents
1  General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Structure of the Qi Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.5 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.6 Power Profiles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2  Power Receiver design requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3  Mechanical design guidelines (Informative). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Power Transmitter Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Power Receiver Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Power Transmitter Product Alignment Aid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
...

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