---
product_id: 279157942
title: "Nilight 50003R Automotive Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness-5 Pack, 2 Years Warranty"
brand: "nilight"
price: "€ 61.35"
currency: EUR
in_stock: true
reviews_count: 7
category: "Nilight"
url: https://www.desertcart.sk/products/279157942-nilight-50003r-automotive-set-5-pin-30-40a-12v-spdt
store_origin: SK
region: Slovakia
---

# 40A high switching power 5-pin universal wiring harness Durable male-female interlocking design Nilight 50003R Automotive Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness-5 Pack, 2 Years Warranty

**Brand:** nilight
**Price:** € 61.35
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your ride’s electrical game with Nilight’s powerhouse relay set!

## Quick Answers

- **What is this?** Nilight 50003R Automotive Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness-5 Pack, 2 Years Warranty by nilight
- **How much does it cost?** € 61.35 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/279157942-nilight-50003r-automotive-set-5-pin-30-40a-12v-spdt)

## Best For

- nilight enthusiasts

## Why This Product

- Trusted nilight brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Premium materials guarantee long lifespan and reliable performance
- • **All-in-One Pack:** Includes 5 relays and sockets with wiring harnesses—ready for any project
- • **Plug & Play Simplicity:** Unique male-female slot design ensures clean, hassle-free installation
- • **Color-Coded Convenience:** Wiring harness with distinct colors for effortless, error-free setup
- • **Power Up with Confidence:** Handles up to 40A/14V DC for heavy-duty automotive needs

## Overview

The Nilight 50003R is a universal 5-pin automotive relay set featuring a 40A/14V DC switching capacity, durable male-female interlocking sockets, and color-coded wiring harnesses for easy installation. This 5-pack offers premium quality materials and a 2-year warranty, making it the go-to choice for professional-grade automotive electrical upgrades.

## Description

Buy Nilight 50003R Automotive Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness-5 Pack, 2 Years Warranty online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

Review: Nice quality - The good thing about it it have a built-in fuse which make life easier, and a relief of the wiring hassle. So far no issues with the relay.
Review: Fix the images - Carefull some misslabeling in one image that confuses common trigger wire and positive source. Ur relay will still work but you will be pulling power from wrong side. Best read the numbers on the relays and trace the wires

## Features

- High switching capability: Normally open 40A/14V DC and normally close 30A/14V DC. Suitable for Nilight LED light bar wiring harness kit
- Premium quality: Durable relay and harness socket with 5 wires; Made by high-grade materials to ensure superior quality and long lifespan
- Male-female slot design: Unique male-female slot design, easy to connect the relay with harness socket, clean and neat after installation
- Easy wiring: The relay sockets come with different colors for loads/accessories, simple and convenient wiring
- Package include: 5 x relay and 5 x relay socket with wires.Fit type: Universal fit

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0748F1JK4 |
| Best Sellers Rank | #6,794 in Automotive ( See Top 100 in Automotive ) #14 in Car Electrical Wiring Harnesses |
| Item model number | 50003R |
| Manufacturer | Nilight |
| Product Dimensions | 12.7 x 5.08 x 12.7 cm; 226.8 g |

## Product Details

- **Connector type:** Plug-In
- **Contact material:** Silver Copper
- **Contact type:** Normally Open
- **Current rating:** 40 Amps
- **Mounting type:** Surface Mount

## Images

![Nilight 50003R Automotive Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness-5 Pack, 2 Years Warranty - Image 1](https://m.media-amazon.com/images/I/61QfU5CpR+L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: How long will this last with constant on and off pulses**
A: Mechanical (at 7,200 ops./h): 10,000,000
Electrical (at 600 ops./h): 100,000

**Q: Is it possible to remove the metal mounting bracket so it can be used in a relay box?**
A: The mounting tab can easily be removed however I don’t know if they would fit in a relay box

**Q: I am looking for turn signal relay to correct hyper-flash with led bulbs on 2012 Honda Fit, with out having to put resistor at each location ???**
A: Go to a truck stop and get an electronic flasher,it doesn't care how many lights you have in the system or how few.

**Q: I want to use this to power my cooling fan when the ignition key is turned. If I wire off the battery will it work?**
A: As long as
1. You wire the common (terminal 30) to your fan+, and
2. You wire NO (terminal 87) to VBat (through a fuse),

You should be fine.  That is pretty much how my car has these relays wired from the factory for the radiator fans.  I assume you will connect terminal 85 to VBat through a fuse, and your ignition-control wire is a ground-interrupt connected to terminal 86 (otherwise, if your ignition-on wire is +12V/hot, you will want to connect it through a fuse to terminal 85, and simply ground terminal 86).  I seem to recall these solenoid coils pull about 130mA at 12V when I tested them.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice quality
*by F***N on 2 April 2024*

The good thing about it it have a built-in fuse which make life easier, and a relief of the wiring hassle. So far no issues with the relay.

### ⭐ Fix the images
*by D***A on 15 December 2023*

Carefull some misslabeling in one image that confuses common trigger wire and positive source. Ur relay will still work but you will be pulling power from wrong side. Best read the numbers on the relays and trace the wires

### ⭐⭐⭐⭐⭐ Review
*by H***Y on 6 July 2012*

I bought this relay to put on my Chevy Truck for some new 10" Electric Radiator fans. I live in the Desert and it gets pretty hot around here. When I run the AC at an Idle the AC was struggling. So I added these fans and I needed a good relay to handle the amps and not get wet. This relay does the trick. So far I have had no problems and the AC works like a charm. One thing I did notice is that the picture shows a metal bracket and the one I got was just plastic. I would have preferred one with a metal bracket but oh well. Other than that it does what it should. I hope it last as only time will tell. UPDATE 9-9-13: Well it has been a year and this little relay is still going strong. Arizona heat has nothing on this relay..... UPDATE: 1-1-2015 So here we are over two years and this thing still rocks.

## Frequently Bought Together

- Nilight 50003R Automotive Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness-5 Pack, 2 Years Warranty
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- 12 AWG Inline Fuse Holder - 12 Gauge Fuse Holder for 30A Blade Fuse (6 Pack)

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**Shop now:** [https://www.desertcart.sk/products/279157942-nilight-50003r-automotive-set-5-pin-30-40a-12v-spdt](https://www.desertcart.sk/products/279157942-nilight-50003r-automotive-set-5-pin-30-40a-12v-spdt)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-08*