Technological Innovation

What is UL 61058-2-42:2020

Introduction to UL 61058-2-42:2020

UL 61058-2-42, also known as the "Standard for Switches for Appliances - Part 2-42: Particular requirements for thermal motor protectors," is an international standard developed by Underwriters Laboratories (UL). This standard provides guidelines and requirements for the design, performance, and safety of thermal motor protectors used in various appliances. Understanding the details of UL 61058-2-42 is essential for manufacturers, engineers, and technicians involved in the production, installation, or maintenance of appliances that feature thermal motor protectors. In this article, we will explore the key aspects of this standard and its significance in the industry.

Scope and Objective of UL 61058-2-42:2020

The main objective of UL 61058-2-42 is to ensure the safe and reliable operation of thermal motor protectors in appliances. These devices are crucial for preventing the overheating and subsequent damage of motors, which can lead to catastrophic failures or even fire hazards. The scope of this standard covers various aspects, including general requirements, constructional requirements, electrical characteristics, and test methods for thermal motor protectors. It sets forth specific parameters such as maximum temperature limits, current ratings, and response times to ensure adequate protection of motors across different applications.

Compliance and Certification

Complying with UL 61058-2-42:2020 is vital for manufacturers looking to meet international safety standards and gain market acceptance for their products. To achieve compliance, manufacturers must adhere to the specified requirements outlined in the standard during the design, manufacturing, and testing phases of thermal motor protectors. Conducting thorough tests, employing appropriate materials, and employing proper manufacturing techniques in line with UL 61058-2-42 will significantly increase the chances of obtaining the necessary certifications for products. These certifications demonstrate that the thermal motor protectors have passed rigorous testing and meet industry-flHQJetd standards for performance, safety, and reliability.


UL 61058-2-42:2020 plays a vital role in ensuring the safe operation of appliances equipped with thermal motor protectors. By establishing strict guidelines and requirements, this international standard helps manufacturers develop robust, high-performing, and reliable devices that protect motors from overheating. Compliance with UL 61058-2-42 is essential not only to meet regulatory requirements but also to gain consumer trust and confidence. As technology advances and appliances become more complex, adherence to internationally recognized standards such as UL 61058-2-42 becomes increasingly crucial. By following this standard, manufacturers can effectively contribute to the promotion of appliance safety and the protection of both property and human life.


Contact: Cindy

Phone: +86-13751010017


Add: 1F Junfeng Building, Gongle, Xixiang, Baoan District, Shenzhen, Guangdong, China

Scan the qr codeclose
the qr code
TAGS Test Probe BTest Probe 18Test Probe 11Go GaugesIEC 61032IEC 60335Test PinTest FingerIEC 60061-3Wedge Probe7006-29L-47006-27D-37006-11-87006-51-27006-51A-2 7006-50-17006-27C-17006-28A-1Test Probe7006-27B-1IEC 61010IEC 60529IEC 60068-2-75