IEC 63356-2:2024

LED light source characteristics - Part 2: Design parameters and values

IEC 63356-2:2024 specifies design parameters and design values of an LED light source or related interface characteristics.
NOTE 1 Interface characteristics can cover interfaces between the LED light source and the luminaire or the controlgear, or the LED light source and additional attachments.
NOTE 2 Interfaces can be related to for example electrical, mechanical, or optical aspects.
This document does not cover interchangeability between products from different LED light source manufacturers.
NOTE 3 Interchangeability is covered by IEC 63356-1.
Lamp caps and lampholders specified in the IEC 60061 series are not within the scope of this document. This second edition cancels and replaces the first edition published in 2022. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) a new Clause 6 for circular LED modules with a circular light emitting surface for spot lighting has been added;
b) a new Clause 7 for LEDni modules with a rectangular shape and a circular light emitting surface has been added.

Caractéristiques de source lumineuse à LED - Partie 2: Paramètres et valeurs de conception

L’IEC 63356-2:2024 spécifie les paramètres et valeurs de conception d’une source lumineuse à LED ou les caractéristiques d’interface associées.
NOTE 1 Les caractéristiques d'interface peuvent couvrir les interfaces entre la source lumineuse à LED et le luminaire ou l’appareillage, ou entre la source lumineuse à LED et d’autres accessoires.
NOTE 2 Les interfaces peuvent être liées, par exemple, à des aspects électriques, mécaniques ou optiques.
Le présent document ne couvre pas l’interchangeabilité entre les produits de différents fabricants de sources lumineuses à LED.
NOTE 3 L’interchangeabilité est couverte par l’IEC 63356-1.
Les culots de lampes et les douilles spécifiés dans la série IEC 60061 ne font pas partie du domaine d’application du présent document. Cette deuxième édition annule et remplace la première édition parue en 2022. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) un nouvel article 6 relatif aux modules à LED circulaires avec une surface électroluminescente circulaire pour l’éclairage par spots a été ajouté ;
b) un nouvel article 7 relatif aux modules à LEDni de forme rectangulaire avec une surface électroluminescente circulaire a été ajouté.

General Information

• Status: Published
• Publication Date: 12-Sep-2024
• ICS: 29.140.99 - Other standards related to lamps
• Technical Committee: SC 34A - Electric light sources
• Current Stage: PPUB - Publication issued
• Start Date: 04-Oct-2024
• Completion Date: 13-Sep-2024

Relations

• Revises: IEC 63356-2:2022 - LED light source characteristics - Part 2: Design parameters and values
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 63356-2 ®
Edition 2.0 2024-09
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
LED light source characteristics –
Part 2: Design parameters and values
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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IEC 63356-2 ®
Edition 2.0 2024-09
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
LED light source characteristics –
Part 2: Design parameters and values
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.140.99 ISBN 978-2-8322-9735-3

– 2 – IEC 63356-2:2024 RLV © IEC 2024
CONTENTS
FOREWORD . 5
INTRODUCTION .
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Overview and common information . 9
4.1 General . 9
4.2 Numbering system . 9
5 Rectangular LED modules with undefined light emitting surface. 9
5.1 General . 9
5.2 Mechanical references . 9
5.3 LED module categories . 10
5.3.1 General . 10
5.3.2 L6W6 . 10
5.3.3 L14W2 . 11
5.3.4 L28W2 . 12
5.3.5 L28W4 . 13
5.3.6 L28W6 . 14
5.3.7 L28W28 . 15
5.3.8 L38W38 . 17
5.3.9 L56W56 . 20
5.3.10 L56W2 . 22
5.3.11 L56W4 . 22
5.3.12 L112W2 . 23
5.3.13 L115W2 . 26
5.3.14 L140W2 . 28
5.3.15 L145W2 . 30
5.3.16 L30W1 . 32
5.3.17 L58W1 . 33
5.3.18 L115W1 . 34
5.3.19 L145W1 . 35
6 Circular LED modules with a circular light emitting surface for spot lighting . 36
6.1 General . 36
6.2 Mechanical references . 36
6.3 Mechanical interface of the LED module . 38
6.3.1 LED module demarcation . 38
6.3.2 Optics contact area . 39
6.3.3 Requirements on screw holes . 41
6.3.4 LED module electrical interconnect . 41
6.3.5 Luminaire exclusion limits for electrical interconnects . 41
6.3.6 Inner feature . 42
6.3.7 Luminaire mechanical properties . 42
7 LEDni modules with a rectangular shape and a circular light emitting surface . 42
7.1 General . 42
7.2 Mechanical references for an LEDni module . 43
7.3 Mechanical interface of the LEDni module . 44

7.4 LEDni module outlines . 44
7.4.1 General . 44
7.4.2 LEDni modules without mounting features . 45
7.4.3 LEDni modules with mounting holes . 46
7.4.4 LEDni modules with recessed corners . 46
7.5 Electrical contact areas . 47
7.5.1 Contact location . 47
7.5.2 Minimum contact size . 47
7.5.3 Contact overlap area . 48
7.5.4 Maximum electrical contact area . 48
7.6 PCB thickness . 49
7.7 Inclusion limit zone . 49
Bibliography . 51

Figure 1 – Example of a luminaire with two LED modules . 9
Figure 2 – Positions of the reference point and the reference plane of the LED module . 10
Figure 3 – LED module demarcation of the L6W6 category . 11
Figure 4 – LED module demarcation of the L14W2 category . 12
Figure 5 – LED module demarcation of the L28W2 category . 13
Figure 6 – LED module demarcation of the L28W4 category . 14
Figure 7 – LED module demarcation of the L28W6 category . 15
Figure 8 – LED module demarcation of the L28W28 category . 17
Figure 9 – LED module demarcation of the L38W38 category . 19
Figure 10 – LED module demarcation of the L56W56 category . 21
Figure 11 – LED module demarcation of the L56W2 category . 22
Figure 12 – LED module demarcation of the L56W4 category . 23
Figure 13 – LED module demarcation of the L112W2 category . 25
Figure 14 – LED module demarcation of the L115W2 category . 27
Figure 15 – LED module demarcation of the L140W2 category . 29
Figure 16 – LED module demarcation of the L145W2 category . 31
Figure 17 – LED module demarcation of the L30W1 category . 32
Figure 18 – LED module demarcation of the L58W1 category . 33
Figure 19 – LED module demarcation of the L115W1 category . 34
Figure 20 – LED module demarcation of the L145W1 category . 35
Figure 21 – Positions of the reference point and reference plane of the LED module . 37
Figure 22 – Positions of the reference point, plane and axis for the LED module
(example for D50 category) . 37
Figure 23 – Drawing of the demarcation of a D35 LED module . 38
Figure 24 – Drawing of the demarcation of the D50 LED module . 39
Figure 25 – Optics contact area of a D35 LED module . 40
Figure 26 – Dimensions of OCAs for a D50 category . 40
Figure 27 – Maximum inner feature outlines . 42
Figure 28 – Positions of the reference point and the reference plane of an LEDni
module . 43
Figure 29 – Definition of the LEDni module border and mechanical references . 44

– 4 – IEC 63356-2:2024 RLV © IEC 2024
Figure 30 – Demarcation model for the outline of an LEDni module without mounting
features . 45
Figure 31 – Demarcation model for the outline of an LEDni module having mounting
holes. 46
Figure 32 – Demarcation model for the outline of an LEDni module having recessed
corners . 47
Figure 33 – Location of the electrical contacts for LEDni modules . 47
Figure 34 – Minimum size contact area for LEDni module electrical contacts . 48
Figure 35 – Overlap area for the electrical contacts of LEDni modules . 48
Figure 36 – Maximum electrical contac
...

IEC 63356-2 ®
Edition 2.0 2024-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
LED light source characteristics –
Part 2: Design parameters and values

Caractéristiques de source lumineuse à LED –
Partie 2: Paramètres et valeurs de conception
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

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IEC 63356-2 ®
Edition 2.0 2024-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
LED light source characteristics –

Part 2: Design parameters and values

Caractéristiques de source lumineuse à LED –

Partie 2: Paramètres et valeurs de conception

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.99  ISBN 978-2-8322-9618-9

– 2 – IEC 63356-2:2024 © IEC 2024
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Overview and common information . 8
4.1 General . 8
4.2 Numbering system . 8
5 Rectangular LED modules with undefined light emitting surface. 8
5.1 General . 8
5.2 Mechanical references . 8
5.3 LED module categories . 9
5.3.1 General . 9
5.3.2 L6W6 . 9
5.3.3 L14W2 . 10
5.3.4 L28W2 . 11
5.3.5 L28W4 . 12
5.3.6 L28W6 . 13
5.3.7 L28W28 . 14
5.3.8 L38W38 . 16
5.3.9 L56W56 . 19
5.3.10 L56W2 . 21
5.3.11 L56W4 . 21
5.3.12 L112W2 . 22
5.3.13 L115W2 . 25
5.3.14 L140W2 . 27
5.3.15 L145W2 . 29
5.3.16 L30W1 . 31
5.3.17 L58W1 . 32
5.3.18 L115W1 . 33
5.3.19 L145W1 . 34
6 Circular LED modules with a circular light emitting surface for spot lighting . 35
6.1 General . 35
6.2 Mechanical references . 35
6.3 Mechanical interface of the LED module . 37
6.3.1 LED module demarcation . 37
6.3.2 Optics contact area . 38
6.3.3 Requirements on screw holes . 40
6.3.4 LED module electrical interconnect . 40
6.3.5 Luminaire exclusion limits for electrical interconnects . 40
6.3.6 Inner feature . 41
6.3.7 Luminaire mechanical properties . 41
7 LEDni modules with a rectangular shape and a circular light emitting surface . 41
7.1 General . 41
7.2 Mechanical references for an LEDni module . 42
7.3 Mechanical interface of the LEDni module . 43
7.4 LEDni module outlines . 43

7.4.1 General . 43
7.4.2 LEDni modules without mounting features . 44
7.4.3 LEDni modules with mounting holes . 45
7.4.4 LEDni modules with recessed corners . 45
7.5 Electrical contact areas . 46
7.5.1 Contact location . 46
7.5.2 Minimum contact size . 46
7.5.3 Contact overlap area . 47
7.5.4 Maximum electrical contact area . 47
7.6 PCB thickness . 48
7.7 Inclusion limit zone . 48
Bibliography . 50

Figure 1 – Example of a luminaire with two LED modules . 8
Figure 2 – Positions of the reference point and the reference plane of the LED module . 9
Figure 3 – LED module demarcation of the L6W6 category . 10
Figure 4 – LED module demarcation of the L14W2 category . 11
Figure 5 – LED module demarcation of the L28W2 category . 12
Figure 6 – LED module demarcation of the L28W4 category . 13
Figure 7 – LED module demarcation of the L28W6 category . 14
Figure 8 – LED module demarcation of the L28W28 category . 16
Figure 9 – LED module demarcation of the L38W38 category . 18
Figure 10 – LED module demarcation of the L56W56 category . 20
Figure 11 – LED module demarcation of the L56W2 category . 21
Figure 12 – LED module demarcation of the L56W4 category . 22
Figure 13 – LED module demarcation of the L112W2 category . 24
Figure 14 – LED module demarcation of the L115W2 category . 26
Figure 15 – LED module demarcation of the L140W2 category . 28
Figure 16 – LED module demarcation of the L145W2 category . 30
Figure 17 – LED mod
...