12V/24V DC 500A 4‑Pin Automotive Relay (Plastic Housing) Key benefits Reliable high-current switching: Rated for up to 500A, this relay safely switches heavy automotive loads without stressing small switches or control circuits. Dual-voltage compatibility: Works with 12V or 24V DC systems, making it suitable for a wide range of cars, trucks, and utility vehicles. Simplifies battery management: Functions as a double-battery isolator to keep starter and auxiliary batteries separated, preventing unwanted cross-drain and helping preserve vehicle starting power. Durable, vehicle-ready construction: Plastic housing designed for automotive environments provides a robust, lightweight enclosure that resists routine vibration and dirt exposure. Straightforward integration: 4‑pin configuration supports simple on/off control for power circuits and is easy to wire into common automotive setups. Features and performance Voltage: 12V / 24V DC compatible. Current rating: 500A maximum for high-current accessories and power distribution. Pins: 4-pin relay format for compact, effective on/off switching. Material: Plastic body suitable for typical car environments. Continuous operation: Rated to handle 12V continuous power loads in vehicle electrical systems. Who needs this and how it solves problems Installers who need a compact, high-capacity relay to protect switches and wiring from high currents. Vehicle owners who want reliable isolation between two batteries to prevent parasitic drain and ensure the starter battery remains charged. Anyone adding high-power accessories (inverters, winches, heavy lighting) who requires a safe, dedicated switching device. Practical use scenarios Dual-battery setup: Use as a battery isolator to connect an auxiliary battery for accessories while keeping the starter battery protected from discharge when accessories are in use. Winch or inverter control: Switch heavy loads such as a winch motor or vehicle inverter, using a low-current control circuit to operate the high-current path. Auxiliary power distribution: Central on/off control for aftermarket power systems (fridges, lighting, compressors) that demand reliable 500A switching capacity. Specifications summary Type: 4-pin automotive power relay Voltage: 12V / 24V DC Current rating: 500A Housing: Plastic Primary functions: On/off power switching, double-battery isolator, 12V continuous power handling Includes no additional accessories. Ensure correct wiring and fusing per your vehicle’s electrical requirements.