A current limiter is an electronic circuit or device designed to restrict the amount of electrical current flowing through a component or system. Its main purpose is to prevent excessive current, which can cause overheating, component failure, or even fires. Current limiters are commonly used in power supplies, battery chargers, and various electronic devices to protect sensitive components. They work by automatically reducing or cutting off the current when it exceeds a predetermined safe value. This protection mechanism is essential in both consumer electronics and industrial systems, ensuring safety, reliability, and longevity of electronic equipment.