ECSS-Q-60-11A, SPACE PRODUCT ASSURANCE: DERATING AND END-OF-LIFE (EOL) PARAMETER DRIFTS - EEE COMPONENTS (07-SEP-2004)

ECSS-Q-60-11A, SPACE PRODUCT ASSURANCE: DERATING AND END-OF-LIFE (EOL) PARAMETER DRIFTS - EEE COMPONENTS (07-SEP-2004)., This Standard specifies derating requirements applicable to electronic, electrical and electromechanical components and end-of-life drifts in component parameters to be used in worst case analyses. Derating is a long standing practice applied to components used on spacecrafts. Benefits of this practice are now proven, but for competitiveness reasons, it becomes necessary to find an optimized reliability. Too high a derating can lead to over-design, over-cost andover-sizing of components, thedirect consequence being excess volume and weight. The aim is to obtain reliable and high performance equipment without over-sizing of the components. For this reason and if possible, this Standard provides derating requirements depending onmission duration and mean temperature, taking into account demonstrated limits of component capabilities.