Automotive relays are crucial components in modern vehicles, enabling efficient control of electrical circuits and systems. These small but powerful devices act as electrical switches, allowing low-voltage signals to control high-voltage circuits safely. Among the many factors that define the performance and suitability of Automotive relays, the specifications of the relay coil play a key role in determining its efficiency, reliability, and overall function within the vehicle's electrical system. This article explores the essential aspects of Automotive relay coil specifications, offering insights into their design, operation, and selection criteria.