This WM686 Universal Relay is a heavy-duty 4-pin, normally open relay designed for reliable battery connection and disconnection in automotive and marine applications. Available in both 100A and 200A configurations, it operates on DC 12V or 24V systems, making it a versatile choice for a wide range of vehicles and equipment. The relay is ideal for use as a car starter relay, battery on/off switch, or split charge relay, giving you dependable control over high-power electrical circuits. Its robust construction ensures stable performance under demanding switching conditions, while the clearly labeled terminals (30, 86, 85, 87) make wiring straightforward. A convenient mounting bracket allows for easy installation in tight spaces. Built to meet EU LVD safety standards for low voltage electrical systems, this relay delivers consistent, long-lasting performance whether you're managing dual battery setups, winches, or other high-current accessories.