HOME / Agreement on Acceptance of Components Agreement on Acceptance of Components Overview CSA Group and Underwriters Laboratories Inc. (UL) To help address the needs of manufacturers, in 2003 CSA Group and UL established a collaborative process leading to the mutual acceptance of components* used in Low Voltage Distribution and Control Equipment. Under this Memorandum of Understanding (MOU), each certification body has agreed to treat components certified by the other certification body the same way as it treats components it has certified itself. Each organization will authorize the use of its mark and require its follow-up service. The scope of the MOU covers the component categories specified in Annex A when these components are used in the end products specified in Annex B or as a component in other Annex A products. CSA Group and UL continue to look for joint opportunities to help assist manufacturers with their specific North American certification needs. *For the purpose of this agreement, a component is any device that is a building block of an electrical product or another electrical component. Ask us your component MOU questions. If you have questions about the component MOU signed between CSA Group and UL, please contact us at [email protected] White Paper Protecting Industrial Control Systems from Advanced Cyber Threats Explore a comprehensive defense strategy that pairs cybersecurity and functional safety in every layer of the control system. Read White Paper View All White Papers Protecting Industrial Control Systems from Advanced Cyber Threats Read White Paper Services We offer expert services and custom solutions that help bring your product to market while ensuring compliance and safety. Get your products tested, inspected, and certified for safety, compliance, and global market access Testing Transform your innovations into quality products that meet critical safety requirements with our expert testing services. Certification Launch new products, and boost customer confidence in North America and beyond with our global certification solutions. Marks & Labels Get the marks you need to access and enter your target markets in North America with confidence. Added-Value Services Save time and gain efficiencies with access to our customer portal, online product listings, and more.