This heavy-duty DC power relay contactor is engineered for demanding vehicle and agricultural applications, rated for an impressive 500 amperes at 12V/24V DC. The robust construction features brass terminals and a durable black housing with integrated mounting brackets for secure installation. Perfect for high-current switching applications, this relay serves as a reliable starting contactor and preheating control component in agricultural vehicles and other heavy equipment. The device includes clear terminal markings and a circuit diagram for proper installation. Its sturdy design incorporates silver-plated contacts for excellent conductivity and heat dissipation, while the sealed construction helps protect internal components from dust and debris. This versatile power control relay is ideal for managing large DC loads in vehicle electrical systems, making it an essential component for heavy equipment applications where reliable power switching is crucial.