An electromechanical switching system includes a first conductive portion and a second conductive portion. The first conductive portion includes a conductive stationary end and a conductive floating end, connected by a shape memory alloy (SMA). When an input stimulus current is applied to the SMA, changes in the SMA urge motion of the conductive floating end of the first conductive portion toward the second conductive portion, which in turn causes a change in the state of the electromechanical switching system. The input stimulus current may be calculated to satisfy a given response time requirement.