Specification and Design of Established Reliability Power Relays

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.