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Managing transient and peak current spikes with power supplies is a crucial aspect of circuit design, particularly when dealing with advanced circuitry. Inrush occurs when there is a temporary spike in voltage that is present when a device is initially powered the device or when a capacitor in the circuit starts charging up.

The high peak current leads to overheating to electronic components, overheating of components in the circuit, and damage to the power. To manage the impact of inrush voltage peaks with devices, designers employ a range of techniques that can be broadly categorized into two main categories: reactive and active solutions.

Passive approaches focus on using electronic components to limit or inrush current. One popular way to handle of energy spike reduction resistors, electronics for parts which are a small loss in voltage, thereby the peak current. However, ICL resistors are more used in applications where a significant reduction in inrush energy surges is not required.

A more effective solution is the use of NTC thermistors, which exhibit a high resistance at low temperatures and a temperature temperatures and a high resistance. When a circuit is initially turned on, the temporary current leads to the increase of resistance, regulating the flow of current. Once the inrush current has been, the thermistor cools down, and increases to normal.