BS EN IEC 63356-2-2024 PDF

Full title and description

STB BS EN IEC 63356-2:2024 — LED light source characteristics — Part 2: Design parameters and values. This document defines practical design parameters, mechanical/electrical/optical interface geometry and recommended values for LED modules and related interfaces (mounting, contact areas, demarcation models and exclusion zones) to support reliable integration of LED light sources into luminaires and accessories.

Abstract

This standard (Part 2 of the IEC 63356 series) specifies reference models, demarcation outlines, electrical and optical contact area definitions, mounting features, inclusion/exclusion zones and recommended dimensional values for rectangular, circular and LEDni (rectangular outline with circular light-emitting surface) LED modules. It is intended to reduce design iterations and improve mechanical, optical and electrical compatibility between LED modules, luminaires, controlgear and attachments.

General information

• Status: Current / Active (BS EN adoption of IEC 63356-2:2024).
• Publication date: BS EN publication date 29 October 2024 (original IEC publication 13 September 2024).
• Publisher: British Standards Institution (BSI) — adopted from the International Electrotechnical Commission (IEC).
• ICS / categories: 29.140.99 (other standards related to lamps / electric light sources).
• Edition / version: Edition 2.0 (2024).
• Number of pages: 54 pages for the BS/EN adoption (line-length and formatting may vary by publisher/format).

Scope

The document defines design parameters and values for LED light sources and related interface characteristics — mechanical, electrical and optical — that affect how an LED module fits and functions within a luminaire or with attachments and controlgear. It provides demarcation models, reference points/planes, contact area dimensions (optical contact areas and electrical contact areas), mounting hole locations, permissible inclusion/exclusion zones for components and limits for inner features. The standard does not itself establish interchangeability across different manufacturers (interchangeability is addressed in IEC 63356-1) and excludes lamp caps and lampholders specified in the IEC 60061 series.

Key topics and requirements

• Demarcation models and module outlines for rectangular, circular and LEDni module shapes (reference points, planes and numbering).
• Mechanical interface requirements: mounting features, screw-hole locations, luminaire exclusion limits and inner-feature constraints.
• Optics contact areas (OCA): defined locations, heights and tolerances for mating secondary optics (important for spot lighting).
• Electrical contact areas: minimum/maximum contact dimensions, overlap allowances and PCB thickness recommendations for reliable interconnect.
• Module categories and families with tables of dimensional ranges and recommended values to support modular product platforms.
• Inclusion/exclusion limit zones and guidance to avoid interference between module components and luminaire features.
• Extensive figures and tables illustrating reference drawings, example configurations and dimensional values for designers and assessors.

Typical use and users

Used by LED module manufacturers, luminaire designers (mechanical, optical and electrical engineers), controlgear and accessory designers, test laboratories and conformity assessment bodies, procurement/specification writers and standardization committees. The standard is primarily a design/reference resource to ensure predictable mounting, optical alignment and electrical connection between LED modules and luminaire systems, reducing costly redesigns.

Related standards

IEC 63356-1 (interchangeability and additional requirements), IEC 60061 series (lamp caps and lampholders — specifically excluded from this document), and other IEC/CENELEC/EN lighting and safety standards referenced in the bibliography. EN adoption and national implementations may also provide identical national standards (endorsement by CENELEC).

Keywords

LED module, LED light source characteristics, design parameters, demarcation, optics contact area, electrical contact area, mounting interface, LEDni, circular LES, luminaire integration, EN IEC 63356-2, IEC 63356-2.

FAQ

Q: What is this standard?

A: It is Part 2 of the IEC 63356 series — a design-oriented standard that specifies mechanical, electrical and optical interface parameters and recommended values for LED light sources (BS EN IEC 63356-2:2024 is the British/European adoption of IEC 63356-2:2024).

Q: What does it cover?

A: It covers module demarcation and outlines, mounting and screw-hole locations, optics contact areas, electrical contact area definitions, PCB and contact recommendations, inclusion/exclusion zones and dimensional tables/figures for rectangular, circular and LEDni module shapes — but not manufacturer interchangeability or lamp caps/lampholders covered elsewhere.

Q: Who typically uses it?

A: LED manufacturers, luminaire and accessory designers, controlgear designers, test labs, conformity assessors and specification writers who need harmonized mechanical/optical/electrical interface parameters.

Q: Is it current or superseded?

A: It is current (2024 edition, Edition 2.0) and supersedes the previous 2022 edition of EN/IEC 63356-2. National adoptions (EN/BS/other) were published in late 2024.

Q: Is it part of a series?

A: Yes — IEC 63356 is a multi-part series; Part 1 addresses interchangeability and related matters, while Part 2 provides design parameters and values. Other parts (and related IEC/EN documents) provide complementary requirements for testing and interchangeability.

Q: What are the key keywords?

A: LED module, design parameters, demarcation, optics contact area (OCA), electrical contact area, mounting interface, LEDni, circular LES, luminaire compatibility.