A relay is an electrical switch that opens or closes a circuit under the control of another electrical signal. In automotive applications, relays are essential for managing the distribution of power to different systems. Specifically, a 48V automotive relay is designed to operate in vehicles that use a 48V electrical system, which is becoming more common in modern electric and hybrid vehicles.

    The shift to a 48V system is part of the industry's efforts to improve efficiency and performance. While traditional 12V systems are still widely used, 48V systems provide a more efficient means of powering components like electric motors, air conditioning, lighting, and regenerative braking systems. As these systems demand more power, the 48V relay helps manage the higher voltage and ensures that the vehicle’s systems operate safely and efficiently.