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This paper covers work on established reliability for power relays by the National Association of Relay Manufacturers and an Air Force appointed committee working cooperatively with SAE Subcommittee A-2R. A practical means of specifying established reliability for power relays using MIL-R-6106 as a basic specification is proposed. Life cycles from qualification, acceptance and requalification tests are combined to establish a reliability of 1% per 10,000 cycles. The authors also cover principles and procedures for the design and manufacture of established reliability power relays.