ONLINE LED STORE 5-Pack Bosch-style 5‑Pin Waterproof 12V SPDT Relay Kit — 40A Heavy‑Duty, Colour‑Coded

The True MODS 5 Pack Bosch-style 5-pin waterproof relay kit is a compact, high-current 12V SPDT relay solution built for rugged electrical projects and automotive accessory installs.

This kit from ONLINE LED STORE bundles five Bosch-style 5-pin single-pole double-throw (SPDT) relays rated for 12VDC operation (14V max) with high switching capacity. Each relay features waterproof construction and heavy-duty 12AWG main contact wires to handle high-current loads up to 40A (30A continuous), plus clearly color-coded leads for fast, reliable wiring. A downloadable user manual is included in the product information section to guide correct installation and safe use.

How does this relay kit improve my automotive accessory installs?

These relays let you switch high-current accessories (lights, horns, pumps) using a low-current trigger from a switch or controller, protecting factory wiring and switches. The Bosch-style plug format fits many standard sockets and aftermarket harnesses for straightforward replacement or integration.

• SPDT design provides both normally open and normally closed circuits for flexibility.
• Heavy 12AWG wires handle main load currents to reduce voltage drop.
• Waterproof housing resists moisture for exterior use.
• Color-coded leads (black, red, white, yellow, blue) speed up wiring and troubleshooting.

What wiring and electrical specifications should I expect?

The kit uses a standard Bosch-style 5-pin pinout with labeled wire functions, making it compatible with many existing wiring setups. It’s designed for 12V vehicle systems and supports up to 40A peak switching in the primary contact path.

• Operating voltage: 12VDC (maximum 14V).
• Switching capacity: 40A peak, 30A continuous on the main contact.
• Wire functions: Black = Ground (85), Red = VDC/Power (30), White = Trigger/Coil (86), Yellow = Normally Closed (87a), Blue = Normally Open (87).
• Heavy-duty 12AWG for main contact wiring to support higher currents.

Are these relays safe for outdoor or marine use?

The relays are built with waterproof construction to withstand damp and exposed environments, but proper installation and additional protection are recommended for prolonged marine exposure. Use sealed connectors and route wiring to minimize saltwater contact and chafing.

• Waterproof housing reduces water ingress risk for outdoor mounting.
• Use sealed connectors and heat-shrink boots for added corrosion protection.
• Mount away from direct spray and high-heat engine components when possible.
• Consult the included user manual for best-practice mounting and wiring tips.

Who is this for? This 5-pack is aimed at installers, hobbyists, and fleet technicians who need a dependable, replaceable relay option for lighting, accessory, and auxiliary power circuits. It’s also useful for anyone retrofitting aftermarket equipment or building custom wiring harnesses where high current switching and moisture resistance are required. If you work on cars, trucks, ATVs, boats (with proper protection), or off-grid electrical projects and want a standardized, heavy-duty relay solution with clear wiring labels, this kit is a practical, cost-effective choice.