This waterproof automotive relay is an essential component for controlling high-current electrical circuits in your vehicle. Designed to handle up to 40A, this relay is perfect for demanding applications including fog lights, headlights, battery control, oil pump systems, cooling fans, air conditioning, and custom wiring harnesses. The relay features a robust construction with a red copper coil and Cu-AG-Cr silver alloy contact points that ensure reliable performance and extended service life. Available in both 4-pin and 5-pin configurations, it operates on DC 12V or 24V systems, making it compatible with a wide range of vehicles. The sealed, waterproof design protects against moisture and contaminants, ensuring dependable operation in harsh automotive environments. Built-in fuse protection adds an extra layer of safety to your electrical system. With an impressive electrical life of 100,000 operations and mechanical life of 10,000,000 operations, this relay is engineered for durability. The red copper terminals provide excellent conductivity and corrosion resistance. Operating temperature range spans from -40°F to 185°F, while storage capability extends to 311°F. Quick operate and release times of 7ms and 5ms respectively ensure responsive switching. Each purchase includes the relay with socket for convenient installation.