IEC 60061-1:1969/AMD66:2026

• Status: Published
• Publication Date: 25-Aug-2026
• ICS: 29.140.10 - Lamp caps and holders
• Technical Committee: SC 34B - Fit systems for light sources
• Drafting Committee: WG 2 - TC 34/SC 34B/WG 2
• Current Stage: PPUB - Publication issued
• Start Date: 26-Aug-2026
• Completion Date: 18-Sep-2026

Overview

IEC 60061-1:1969/AMD66:2026 Amendment 66 addresses updates to the international standard for lamp caps and holders, specifically Part 1: Lamp Caps. This amendment is issued by the International Electrotechnical Commission (IEC), a recognized global authority for electrotechnical standardization. IEC 60061-1 is essential for ensuring lamp caps are interchangeable and safe by defining dimensions, types, and designations used in lighting equipment worldwide. Amendment 66 introduces new and revised standard sheets targeted at maintaining compatibility, safety, and performance as new technologies and lamp types emerge.

Key Topics

• Lamp Cap Types: Covers a wide spectrum of lamp cap systems, including bi-pin caps, screw caps, bayonet caps, prefocus caps, festoon caps, single-pin caps, double and four-pin bases, wedge bases, and specialized caps for automotive and projector lamps.
• System Designations: The amendment references industry designations like G, GX, GY, GU, E, B, BA, P, R, and more, categorizing caps by structure and use.
• Control of Interchangeability: Ensures that lamps and corresponding holders from different manufacturers are compatible, reducing the risk of mismatched equipment.
• Safety Compliance: Standardizes physical parameters and materials to prevent electrical hazards, overheating, and mechanical failure.
• Amended Sheets: Amendment 66 introduces new and updated sheets for several system designations, reflecting industry advancements and emerging needs.
• International Uniformity: Supports global harmonization, enabling effective cross-border trade and application consistency for manufacturers and users.

Applications

IEC 60061-1 and its amendments are vital in the following practical contexts:

• Lighting Product Design & Manufacturing: Lamp and luminaire manufacturers rely on these standards for defining product interfaces to ensure safe and successful operation worldwide.
• Quality Control & Certification: Testing laboratories and certification bodies use IEC 60061-1 sheets and gauges to verify compliance with international requirements.
• Fixture & Holder Design: Companies designing lamp holders use the standard to ensure compatibility with a wide range of lamp caps, covering general lighting, automotive, projection, and specialty lamps.
• Procurement & Specification: Lighting designers, architects, and engineers reference the standard to select and specify appropriate lamp caps for new projects, guaranteeing future replaceability and system safety.
• Standardization Bodies: National committees and industry associations use IEC 60061-1 as a basis for local and regional regulatory documents, ensuring alignment with international best practices.

Related Standards

• IEC 60061-2: Lamp holders and corresponding gauges for the control of interchangeability and safety – Part 2 covers the holders aspect.
• IEC 60061-3: Gauges for control of lamp holder and cap interchangeability.
• IEC 60061-4: Provides guidance for the application and use of sheets for lamps and lamp holders.
• IEC 60598: Luminaires - General requirements and tests, relevant for lighting fixture safety which must be considered alongside IEC 60061.
• ISO/IEC Directives: Development and maintenance of all IEC standards, including reference to safety, conformity, and updates.
• CENELEC EN 60061 Series: European adoptions aligning with the IEC 60061 series for lamp caps and holders.

Keywords: IEC 60061-1, lamp caps, lamp holders, lighting standards, cap interchangeability, lamp safety, Amendment 66, lighting product compliance, standard lamp bases, international standardization.

By keeping up to date with IEC 60061-1:1969/AMD66:2026, manufacturers, designers, and testing organizations ensure products meet the latest requirements for safety, quality, and market compatibility around the globe.