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, when energized, closes or opens a set of contacts. This mechanism enables the safe operation of heavy machinery and automation systems. Contactors are often used in conjunction with relays and circuit breakers to enhance safety and efficiency in electrical systems.