Abstract: The transient response of the high power PIN diode limiter to the step electromagnetic pulse descending edge is calculated by PSpice. Pulse-inversion is observed in the output of the high power PIN diode limiter while the limiter is affected by the step pulse descending edge. The magnitude of the pulse-inversion is equivalent to or in some conditions even larger than spike leakage. Besides the spike leakage, the pulse-inversion may be another potential safety hazard to the high power limiter. The magnitude of the pulse-inversion increases with the augment of the duration and magnitude of the input pulse, and decreases of the input pulse’s fall time and value of the RF impedance inductor.