Abstract: On the basis of equivalent circuit of PIN limiter, we constructed an equivalent circuit model for the simulation of high power microwave effect of PIN limiter. The response property of PIN limiter under the excitation of single high power microwave pulse is studied by using the equivalent circuit model and injection experiment. The evolution of the limiting duration with the injected pulse power and pulse width of the HPM is obtained. In addition, the limiting duration process is theoretically analyzed. Both the simulation and experiment show that: the limiting duration of the PIN limiter increases with the increase of the input power and pulse width of a single high microwave pulse. The experiment matches simulation very well. The ADS equivalent circuit model used in this study can be extended to investigate the transient effect of high power microwave.