MPQ5068 Hot-Swap Protection Device Monolithic Power Systems (MPS) MPQ5068 Hot-Swap Protection Device is designed to protect circuitry on its output from transients on its input. The device also protects its input from undesired shorts and transients coming from its output. During start-up, the slew rate at the output limits the inrush current. An external capacitor connected to the SS pin controls the slew rate.