DC relays are electromagnetic switching devices that use direct current (DC) power to control high-current electrical circuits with a low-power signal. Commonly used in electric vehicles, commercial transportation, renewable energy systems, battery management systems, industrial equipment, and power distribution applications, DC relays provide reliable switching, circuit protection, and load control. Designed to withstand demanding operating environments, DC power relays help improve system safety, efficiency, and performance in applications requiring frequent switching of DC loads.