The WM686 Heavy Current Starting Relay is a high-performance automotive relay engineered to handle the demanding power requirements of 12V and 24V vehicle systems. Rated at an impressive 120A, this relay delivers reliable and consistent engagement for starting circuits in cars, trucks, tractors, and other heavy-duty vehicles. Its compact electromagnetic design ensures fast switching response, making it ideal for applications where dependable high-current control is essential. The robust construction is built to withstand the harsh conditions of automotive environments, including vibration, heat, and electrical stress. Wide voltage compatibility across both 12V and 24V configurations makes it a versatile choice for a range of vehicles and battery setups. The clearly labeled terminal pins (30, 86, 85, 87) make wiring straightforward for both professional installers and experienced DIYers. Whether you are replacing a worn-out relay or upgrading your vehicle's electrical system, the WM686 offers the durability and performance needed to keep your vehicle starting reliably every time.