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What is UL 60947-3:2020?

UL 60947-3:2020 is a technical standard published by Underwriters Laboratories (UL) that specifies the requirements for low-voltage switchgear and controlgear for application in distribution networks. This standard applies to equipment such as circuit-breakers, disconnectors, switches, and fuse-combination units. The latest version, UL 60947-3:2020, replaces the previous revision UL 60947-3:2009 and includes updates to keep up with technological advancements and improved safety practices.

Key Changes in UL 60947-3:2020

The updated version of UL 60947-3 introduces several key changes aimed at enhancing product safety and interoperability. These changes address emerging technologies, new testing methods, and potential hazards associated with operating electrical equipment within various applications. Some noteworthy changes include:

Expanded Scope: UL 60947-3:2020 now covers DC systems up to 2,500V, addressing the increasing demand for DC installations in renewable energy systems and other sectors.

Introduction of Particular Requirements: The standard includes new requirements for particular types of equipment, such as photovoltaic inverters, electronic starters, and solid-state contactors, to accommodate their unique characteristics.

Updated Markings and Documentation: The revised standard defines updated requirements for marking and documentation, ensuring clear identification and traceability of products throughout their lifecycle.

Benefits of Complying with UL 60947-3:2020

Compliance with UL 60947-3:2020 offers numerous benefits for manufacturers, installers, and end-users of low-voltage switchgear and controlgear equipment. These include:

Improved Safety: The updated standard helps reduce the risk of electrical hazards by addressing potential issues related to insulation, temperature-rise limits, short-circuit resistance, mechanical strength, and protection against electric shock.

Enhanced Product Quality: Adhering to UL 60947-3:2020 ensures that equipment meets stringent quality standards, offering reliable performance in a wide range of operating conditions and applications.

Enablement of Market Access: Compliance with this widely recognized international standard facilitates market access, both domestically and internationally, by demonstrating that the products meet necessary safety and performance requirements.


UL 60947-3:2020 provides a comprehensive set of technical requirements for low-voltage switchgear and controlgear equipment, ensuring improved safety, performance, and interoperability. With its recent revisions, the standard aligns with new technologies and emerging application scenarios, catering to the evolving needs of industries reliant on electrical equipment. Compliance with UL 60947-3:2020 offers manufacturers, installers, and end-users the confidence that the equipment they utilize is safe, reliable, and compliant with industry best practices.


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