Upgrade your vehicle's electrical system with this professional-grade automotive relay set. Available in both 12V and 24V versions with 4-pin or 5-pin configurations (models JD1912/JD2912/JD1914/JD2914), these high-performance relays feature a robust 40A current capacity perfect for demanding automotive applications. The waterproof construction ensures reliable operation in challenging underhood environments, while the flame-retardant housing provides exceptional durability and heat resistance. Each relay incorporates premium pure brass terminals for superior electrical conductivity and connection stability. The compact design includes a matching harness socket for straightforward installation. With a modest 1.8W coil power consumption and ability to handle 40A/12VDC switching loads, these relays excel in various automotive control applications including lighting systems, power accessories, and general-purpose switching. The thoughtfully engineered contact design provides both normally open and convert functions for maximum versatility. Built with meticulous attention to quality, these relays deliver the dependable performance required for modern vehicle electrical systems.