Inrush Current Limiters (ICL) are specialized components designed to manage and limit the initial surge current that occurs when electrical devices are powered on. This surge can be significantly higher than the normal operating current, potentially leading to damage or reduced lifespan of electrical components. ICLs function by temporarily increasing their resistance when a surge is detected, effectively controlling the current flow to a safer level, and then gradually decreasing the resistance to allow normal current flow for regular operation.
The primary uses of Inrush Current Limiters include safeguarding power supplies, transformers, motors, and other electronics from the potentially damaging effects of inrush currents. These devices are essential in applications where durability and reliability are critical, such as in industrial equipment, HVAC systems, and consumer electronics. Notable manufacturers of Inrush Current Limiters include Ametherm, Murata, and TDK, among others.