Enclosed silver contacts with reliability nibsReliability nibs improve contact reliability even under dry circuit and fine dust conditionsDiaphragm seals with drainage holesDrainage holes prevent buildup of liquid inside the operator which can prevent operation in freezing environmentsGrounding nibs on the operator casingGrounding nibs bit through paint and other coatings to provide secure groundSlow make and break contact operationAll normally closed contacts have positive opening operation, i.e., normally closed contacts are forced open in the event of contact weld or spring breakage