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As load levels increase, switch life decreases. However, the rated current is only one point on a curve of switch life versus electrical load. For example, a switch having a current rating of 15A at 125VAC in room conditions, based on a life of 100,000 operations with 95% survival, can be expected to satisfactorily control currents below 15A. This life-vs.-load chart for the switch at these conditions shows the expected life at currents below the rated load. At each condition for which the switch is rated, the switch can close the circuit, carry the steady-state current indefinitely, and open the circuit during each cycle of operation through its life.
PTM Published on: 2011-11-01
