This high-performance automotive relay is designed for split charging and various vehicle applications including cars, trucks, RVs, and boats. Built with a durable nylon flame retardant shell and pure copper inner core, it delivers superior heat resistance and electrical conductivity. The relay features a 4-pin SPST (Single Pole Single Throw) configuration with 120A high switching capability, making it ideal for demanding automotive electrical systems. The precision-engineered pure copper coil ensures strong conductive performance with minimal loss rate, while the AgSnO2 composite silver contacts effectively resist bonding for extended service life. Operating on 12V DC (14V max), this relay efficiently converts small current outputs into large currents, helping extend the life of your vehicle's electrical components. Each package includes 2 split charge relays complete with installation accessories . Perfect for automotive enthusiasts and professionals seeking reliable high-current switching solutions.