This heavy-duty DC power relay contactor is engineered for demanding agricultural vehicle applications, offering reliable power control and starting functionality. Rated for an impressive 500 amperes, this robust contactor operates on both 12V and 24V systems, making it versatile for various equipment installations. The unit features high-quality brass terminals and a durable black housing designed to withstand harsh operating conditions. Its preheating capability ensures dependable cold-weather starts, while the sturdy mounting bracket provides secure installation. The integrated circuit design includes built-in protection mechanisms, as indicated by the circuit diagram on the housing. Perfect for controlling high-current DC loads in tractors, harvesters, and other heavy agricultural machinery, this contactor delivers consistent switching performance. The compact yet robust construction includes silver-alloy contacts for enhanced conductivity and longevity, while the sealed design helps protect internal components from dust and debris common in agricultural environments.