This heavy-duty 5-pin relay kit includes 5 SPDT relays rated for 12VDC (14V max) applications, perfect for automotive and marine use. Each relay features robust construction with 12 AWG tinned copper wires for main connections and 16 AWG for control circuits, ensuring reliable power handling up to 40A/30A. The meticulously designed casing is crafted from polycarbonate material, boasting highly effective flame - retardant capabilities. The internal alloy contacts are made from high - quality tin oxide raw materials, offering superior electrical conductivity, ensuring both safety and reliability. The kit includes detailed wiring diagrams for both positive and ground trigger configurations. Each relay measures approximately 6.5cm in height and 3.5cm in width, with pre-wired 19.5cm cable harnesses. The mounting bracket and secure connector design ensure stable installation in demanding environments. These relays are ideal for controlling high-current accessories like lighting systems, winches, or other vehicle electrical components.5-Pack (Relay)with Heavy-Duty Pigtail，for cars, motorcycles, and ships