The COTS solutions proposed by Thales Alenia Space are obtained from the following matters : high heritage on Hirel and COTS components use a depth and focused analysis of major COTS manufacturers a very good knowledge of normative systems (ESA, NASA, AECQ, JEDEC,…) an improved design using products with very high electrical performances compared to HiRel products an internal risk mitigation system As a result, Thales Alenia Space developed, for COTS use in space applications. a disruptive approach with well-defined requirements/rules. This approach takes into account different technical aspects such as radiations, material&processes, reliability, …