The high reliability achieved through a combination of accurately specifying the operating environment and life testing for electromechanical relays, is described. The relay specification should define the requirements of the end application. The operating voltages and the timing must be specified with sufficient margin to assure good and reliable performance. Current limiting also can be very
... [Show full abstract] beneficial to improve the life expectancy for the same load voltage. For relay devices, special up-front testing like contact resistance delta (CRdel) and contact resistance under twist conditions (CRtwist) can effectively improve field reliability.