Contactors are electrical devices used to control the flow of electricity in circuits. They act like switches, allowing or interrupting the current to power various electrical equipment, such as motors and lighting systems. Contactors are designed to handle high voltage and current, making them essential in industrial and commercial applications. These devices consist of an electromagnet that opens or closes a set of contacts when energized. When the coil is powered, the contacts close, allowing electricity to flow. When the coil is de-energized, the contacts open, stopping the current. Contactors are often used in conjunction with relays and circuit breakers for enhanced control and safety.