A bridge rectifier is an electrical circuit that converts alternating current (AC) into direct current (DC). It consists of four diodes arranged in a bridge configuration, allowing current to flow in one direction regardless of the input polarity. This makes it efficient for powering DC devices from AC sources. The main advantage of a bridge rectifier is its ability to provide a smoother DC output compared to other rectifier types. It is commonly used in power supplies and various electronic devices, ensuring that they receive a stable voltage. This component is essential in applications where reliable DC power is needed, such as in battery chargers and power adapters.