This heavy-duty SPST relay harness socket features color-labeled wires for straightforward installation and reliable performance in automotive applications. Operating at 12V DC with a robust 40A rating, it's ideal for trucks, vans, motorcycles, and boats. The relay boasts high-quality silver alloy contacts with a resistance of ≤100MΩ, ensuring dependable switching capabilities. Built for longevity, it offers 100,000 electrical operations and 10 million mechanical operations. The compact design operates efficiently with low power consumption of 1.8W while maintaining high sensitivity. With quick response times - 15ms operate and 10ms release - it delivers precise control. This versatile relay functions across a wide temperature range from -67°F to +158°F and humidity range of 35-80%. The comprehensive package includes mounting hardware and clear installation instructions. Its sealed protective feature and robust construction make it suitable for demanding automotive environments where reliable switching of high-current loads is essential.