This heavy-duty SPST relay harness socket features color-labeled wires for foolproof installation in automotive applications. Operating at 12V DC with a robust 40A rating, it's perfect for trucks, vans, motorcycles, and boats. The silver alloy contacts deliver exceptional reliability with a mechanical life of 10 million operations and electrical life of 100,000 cycles. With a rapid 15ms operate time and 10ms release time, this relay responds quickly while maintaining low power consumption. It performs consistently across temperatures from -55°C to +70°C, making it suitable for demanding environments. The compact design includes built-in protection features and high contact voltage capability. Installation is straightforward thanks to the clear wire color coding and standard mounting configuration. This relay's combination of high sensitivity, durability, and substantial load capacity makes it ideal for both critical and auxiliary vehicle circuits. The sealed construction helps maintain reliable operation in various atmospheric conditions, while the minimum 8V operating voltage ensures consistent performance even in low-voltage situations.