Keep your vehicle's electrical systems running smoothly with this 4-pack of 5-pin electrical switch relays, designed for use in automotive, truck, marine, and boat applications. Each relay operates on a 12V DC coil voltage and is rated at 30/40 amps with a 480-watt switching capacity, making them well-suited for powering headlights, horns, cooling fans, fuel pumps, and other high-draw accessories. The durable brass contacts deliver reliable conductivity and long-lasting performance, even in demanding environments. A normally open contact type supports automatic switching, giving you dependable circuit control for a wide range of accessories. The compact, screw-mount design ensures a secure, vibration-resistant fit in tight engine bays or dash panels. Compatible with standard 5-pin socket configurations, these relays offer straightforward plug-and-play installation in 12V DC electrical systems. Each pack includes 4 relays, so you'll have spares on hand for future projects or replacements. Please verify compatibility with your specific vehicle or application before installation.