Upgrade your vehicle's electrical system with the JD1912 Car Relay Harness, a high-performance 12V 40A 4-pin SPST relay module designed for automotive, truck, van, motorcycle, and marine applications. Built for durability and efficiency, this relay harness features heavy-duty construction with color-labeled wires for easy installation and identification. Engineered for low power consumption and high sensitivity, the relay operates reliably at a standard 12V with a 150mA current, ensuring stable performance in various conditions. The silver alloy contacts provide excellent conductivity with minimal resistance (≤100MΩ), while the sealed design enhances protection against moisture and dust. With an impressive electrical lifespan of 100,000 operations and a mechanical endurance of 10,000,000 operations, this relay delivers long-lasting reliability. Its compact size and high contact voltage make it ideal for space-sensitive installations, while the fast response time (15ms operate, 10ms release) ensures quick switching when needed. Suitable for a wide temperature range (-55°C to +70°C) and humidity conditions (35%-80%), the JD1912 relay harness is a versatile solution for demanding automotive and marine environments. Whether you're upgrading headlights, fog lights, or other electrical components, this relay provides consistent power handling with minimal energy loss. Compatible with various control modules, including Arduino R3, Arm, PIC, AVR, and STM32, it offers flexibility for custom projects. The included 4-pin socket simplifies wiring, making installation straightforward even for DIY enthusiasts. Enhance your vehicle's electrical reliability with the JD1912 Car Relay Harness—designed for performance, durability, and ease of use.