At present, national standards such as GB14048.1-2006, GB 14048.1-2012, GB/T14048.10-2016, GB/T14048.11-2016 have relevant requirements for most parameters. However, some standards focus on low-voltage switchgear and are not very specific to DC contactors, and the specific implementation methods are not perfect. This standard mainly defines and refines the definition, basic requirements, design requirements, and inspection and testing requirements of DC contactors to make them more targeted, normative, and instructive.