Advancing Low-Voltage Fuse Standards: IEC SC 32B Experts Meet at Mersen
February 5, 2026
On 21 January, 2026, Mersen welcomed international experts from the International Electrotechnical Commission (IEC) to its site in Saint-Bonnet-de-Mure, France, for a working meeting of IEC subcommittee SC 32B. This meeting is part of a regular series of international sessions held worldwide to support the continuous development of global standards for low-voltage fuses.
A global framework for low-voltage fuse standardization
IEC subcommittee SC32B is responsible for preparing international standards for low-voltage fuses intended for use at nominal voltages up to 1 000 V AC and 1 500 V DC.
The work of SC32B contributes directly to a shared objective across the electrical industry: protecting people, equipment, and installations through safe, reliable, and internationally harmonized standards.
Focus of the meeting: evolving the IEC 60269 series
The meeting hosted by Mersen focused on the ongoing reorganization of the IEC 60269 series, following discussions initiated at the previous session in Windsor, UK. The main objective was to advance work on voltage-related requirements and to assess whether current definitions and tolerances remain aligned with market expectations and technological developments.
Experts reviewed proposals submitted by different national committees and discussed possible directions for future developments with the aim of ensuring clarity, consistency, and applicability of the standards.
Beyond voltage-related topics, the discussions also touched on several broader themes relevant to the structure and usability of the standards, such as power dissipation’s limits, requirements on fuse terminals and the extension of listed recommended voltage ranges.
These exchanges are part of an ongoing, collaborative process involving experts from around the world.
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