This JD1912 SPST relay harness is engineered for reliable performance in automotive, marine, and other 12V DC applications. Rated for an impressive 40A capacity, it features color-coded wires for foolproof installation and maintenance. The relay's robust Ag alloy contacts ensure dependable switching with minimal resistance, while its sealed construction provides protection in demanding environments. Operating efficiently between -55°C to +70°C, this compact relay delivers exceptional durability with a mechanical lifespan of 10 million operations. The unit requires just 1.8W coil power and offers quick response times - 15ms to operate and 10ms to release. With its high-quality construction and comprehensive specifications including 1500VAC isolation between contact and coil, this relay is ideal for trucks, vans, motorcycles, and boats. The harness socket design simplifies integration into existing electrical systems, making it a practical choice for both OEM installations and aftermarket modifications. Each unit comes complete with mounting hardware and is designed to meet the demanding requirements of vehicle electrical systems.