BS EN IEC 62435-8:2020 pdf free.Electronic components – Long-term storage of electronic semiconductor devices.Passive electronic devices.
BS EN IEC 62435-8 This part of the IEC 62435 series on long-term storage is applied to passive electronic devices in long-term storage that can be used as part of obsolescence mitigation strategy. Longterm storage refers to a duration that can be more than 12 months for product scheduled for storage. Storage typically begins when components are packed at the originating supplier where the pack date or date code are assigned to the product. It is the responsibility of the distributor and the customer to control and manage the aging inventory upon receipt of the dated product. Alternatively, a supplier-customer agreement can be established to manage the aging inventory. Philosophy, good working practice, and general means to facilitate the successful long-term storage of electronic components are also addressed.Passive components are not able to control current where the instantaneous power cannot be negative therefore there is no power gain before the application of electric energy. Common examples of passives are resistors,capacitors, inductors, transformers and diodes of all types. Often electromechanical relays, quartz crystals and fuses are also to be considered passive components for the purpose of long-term storage requirements. Passive components are made using a wide range of technologies, materials and manufacturing processes. Passive components are surface mounted to electronic packages, modules and boards as either discrete components or packaged components that vary in size, typically larger than 1 mm in the smallest dimension. Passive miniaturization has led to packaged passives. Passives are also integrated or embedded into other packaged components, modules and boards.Passive components can experience many of the same failure modes as other components and the storage program should consider the end use and failure mechanisms related to the function of the component. An example list below may be used as a basis for consideration in storage related risk assessments.Failures during long-term storage should be mitigated by control of the stimuli driving given failure modes of interest as defined by a failure modes and effects analysis (FMEA). Storage related failures are often detected as modes of non-operation, visual quality or other nonconformance. The modes of failure during storage are typically related to a failure mechanism.BS EN IEC 62435-8 pdf download.