A contactor is a type of relay (electrically operated switch) with high power rating (current rating and voltage rating). Contactors usually refer to devices switching more than 15 amperes or in circuits …

Learn what a contactor is, how it works, and where it's used in electrical systems. A clear guide to understanding contactors in industrial automation and control circuits.

Dec 10, 2024 · A contactor is an electrically controlled switch designed to switch power circuits on or off. It is essentially a heavy-duty relay designed to handle high currents, making it ideal for applications …

Aug 8, 2025 · A contactor is essentially a heavy-duty relay designed for high-power applications. Understanding its construction, working principle, and correct usage is vital in electrical installation …

A contactor is an electrically controlled switch used for switching a power circuit, similar to a relay except with higher current ratings. A contactor is controlled by a circuit which has a much lower power level …

Sep 25, 2025 · Contactor is an electrical switch for controlling power circuits. Learn its types, uses, working principle and applications for safe and reliable power control.

Jul 7, 2025 · Quick Answer: What is a Contactor? A contactor is an electromechanical switch designed to repeatedly make and break electrical circuits carrying high current loads.

Nov 21, 2025 · A contactor is a heavy-duty, electromechanical switch—like a relay but built for high currents. It controls motors, HVAC units, lighting, and heavy machinery safely and efficiently.

Essentially a heavy-duty version of a relay, a contactor is typically controlled by a circuit that has far less power than a switched circuit.

An electrical contactor is an electrically controlled switch used to manage and control high-current circuits. It operates by opening and closing contacts to switch the power on or off.