[en] A centrifuge test at a constant acceleration level that bounds from above the closure that would be experienced by a normally open switch subjected to a stationary random excitation of fixed duration is derived. The bound is probabilistic in that the induced displacement will be exceeded with a certain selectable probability. The bound was formulated in terms of the system modal properties. Because the spatial distribution of the excitation is smooth and the frequency content is wide band the response is dominated by the first few lowest modes of the structure. It is further shown that the bound is relatively insensitive to the selected desired reliability. Experiments which verify the validity of the bound have been performed