5-Piece 12V 40A 5-Pin Automotive Relay and Harness Set

This five-piece 12V relay and socket set provides a practical way to switch compatible high-current automotive accessories while keeping the control circuit separated from the load. Each relay is supplied with a pre-wired five-pin socket harness for cleaner installation and easier replacement.

Key selling points

• Five complete relay and harness assemblies
• 12V automotive electrical system compatibility
• Up to 40A contact rating for suitable circuits
• Five-pin SPDT changeover configuration
• Pre-wired, colour-coded socket leads
• Removable relay design simplifies future servicing

Specifications

• Quantity: 5 relays and 5 socket harnesses
• Nominal coil voltage: 12V DC
• Contact rating: up to 40A, subject to circuit design and operating conditions
• Terminal layout: 5-pin
• Contact type: SPDT/changeover
• Connection type: pre-wired relay socket
• Typical terminal functions: coil trigger, coil ground, common supply, normally open and normally closed output

Typical applications

Suitable for correctly designed auxiliary lighting, horns, fans, pumps, accessory sockets and other 12V automotive loads. It can be used in cars, 4WDs, trailers and other compatible low-voltage installations.

Package contents

• 5 × 12V 40A five-pin relays
• 5 × pre-wired socket harnesses

Installation notes

Confirm the relay pin diagram, accessory current draw, cable size and switching method before installation. The supply circuit must have correctly rated over-current protection positioned close to the power source. Do not rely on wire colour alone—verify each terminal before connecting. Installation by an experienced automotive electrician is recommended for high-current or safety-related circuits.