This high-capacity waterproof automotive relay is built to handle the demanding electrical needs of modern vehicles. Rated at 100A and compatible with both DC 12V and 24V systems, it delivers reliable switching performance for a wide range of automotive applications. The sealed design protects the internal components — including the tightly wound copper coil and precision contact mechanism — from moisture, dust, and vibration, ensuring consistent operation even in challenging under-hood conditions. The transparent housing allows for easy visual inspection of the internal workings, while the clearly labeled terminals (85, 86, 87, 30) make wiring straightforward. Available in a 4 or 5 pin SPDT configuration, this relay offers flexible control options to suit various vehicle electrical setups. The sturdy copper blade terminals provide a secure, low-resistance connection for high-current loads. Whether you're wiring auxiliary lights, horns, cooling fans, or other high-draw accessories, this general-purpose relay is a dependable choice for both professional installers and DIY enthusiasts.