Upgrade your vehicle's electrical system with the JD1912 Automotive Relay, a high-performance 12V 40A 4-pin relay designed for durability and reliability. Built with a sturdy iron bracket, this relay ensures secure mounting and stable operation in various automotive applications. Engineered for versatility, the JD1912 relay is compatible with cars, trucks, vans, motorcycles, boats, diesel engines, starters, electric fuel pumps, water pumps, trunk solenoids, and security systems. Its robust construction allows it to handle high-current loads, making it ideal for demanding electrical setups. The 4-pin design features clearly labeled terminals for easy installation: 30 (High Power Common Pin), 85 (Relay Coil Ground), 86 (Relay Coil Trigger Wire), and 87 (Normally Open Contact). With a 12V rating (max 14V) and a 40A switching capacity, this relay ensures efficient power transfer while minimizing voltage drop. Whether you need a reliable relay for engine starts, lighting systems, or auxiliary accessories, the JD1912 delivers consistent performance under tough conditions. Its compact and durable design makes it a dependable choice for automotive enthusiasts and professionals alike. Designed for mainland China manufacturing standards, this relay meets quality expectations without compromising performance. Upgrade your vehicle's electrical reliability with the JD1912 Automotive Relay—built to last and ready to perform.