This heavy-duty automotive relay is engineered for high-current applications, rated at an impressive 500A with 12V DC operation. Perfect for dual battery setups and automotive electrical systems, it features robust AgSn alloy contacts and a water-resistant black phenolic plastic housing. The relay boasts exceptional durability with a mechanical life expectancy of 10 million operations and electrical life of 100,000 operations at 30 operations per minute. Operating efficiently within a temperature range of -30 to 80°C, it delivers reliable switching with a rapid 50ms response time for both operation and release. The unit weighs 8.3 ounces and provides excellent insulation resistance. Its sealed construction and vibration resistance of 10-55Hz make it suitable for demanding automotive environments. This relay helps prevent primary battery discharge and is ideal for universal 12V applications where high-current switching is required. The compact design and proven performance make it an essential component for automotive electrical system upgrades and modifications.