This heavy-duty automotive relay is designed for high-current applications, offering reliable performance with a robust 500A switching capacity at 12V DC. Built with durability in mind, it features water-resistant black phenolic plastic construction and silver-tin-indium contact material for optimal conductivity. The relay boasts impressive specifications including a 50ms operate and release time, making it ideal for automotive electrical systems and dual battery setups. Operating effectively in temperatures from -30 to 80°C with humidity tolerance of 40-85%, this relay demonstrates remarkable endurance with a mechanical life expectancy of 10 million operations and electrical life expectancy of 100,000 operations at 30 operations per minute. Its compact design weighs just 8.3 ounces and includes essential protective features. Perfect for extending battery life and preventing primary battery discharge in various 12V applications, this relay serves as a crucial component in automotive electrical systems where reliable high-current switching is paramount.