This part of IEC 62005 focuses on failure mechanisms associated with interconnecting devices and passive components. In order to estimate reliability by the acceleration testing described in IEC 62005-2, it is important to determine the dominant failure mechanism and the related test. This part of IEC 62005 introduces a choice of relevant tests from all the IEC 61300 series tests for each known failure mechanism and failure effects related to certain failure modes. (In IEC 62005-5, extension of severity depending on environmental category and performance request will be given.)