40/60 Amp Single Relay w/Wiring Harness

The 40/60 Amp Single Relay w/Wiring Harness from DERALE is an essential electrical management component for serious automotive enthusiasts upgrading cooling systems, auxiliary lighting, or high-draw aftermarket accessories. Whether you're installing electric fans, winches, or auxiliary lamps, this relay isolates demanding electrical loads from your factory wiring, preventing voltage drop and protecting your vehicle's original electrical architecture from overload conditions.

This single relay harness is engineered to handle continuous amperage up to 40 amps with surge capacity to 60 amps, making it ideal for electric fan conversions and auxiliary circuits that exceed stock charging capacity. The pre-assembled wiring harness eliminates guesswork during installation—spade terminals and connectors are factory-crimped to specification, reducing risk of poor connections that cause voltage loss or component failure. DERALE's relay design uses a sealed coil assembly that resists moisture and vibration, critical for underhood environments where temperature cycling and engine vibration test electrical reliability.

Mechanics and weekend fabricators benefit most from this relay's plug-and-play configuration when retrofitting electric cooling fans into older muscle cars, trucks, or when running dual-fan setups on modern vehicles in extreme climates. The compact form factor (4.3 x 1.9 x 9.6 inches) fits easily into engine bays with space constraints, and the included wiring harness mounts directly to frame or firewall with minimal modification. This relay is essential for any serious upgrade that draws sustained current above 30 amps, ensuring your electrical system remains stable and your accessories operate at full rated capacity without parasitic voltage loss across compromised factory wiring.