---
product_id: 47024300
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: "€ 29.92"
currency: EUR
in_stock: true
reviews_count: 13
category: "Nilight"
url: https://www.desertcart.gr/products/47024300-nilight-50003r-automotive-set-5-pin-30-40a-12v-spdt
store_origin: GR
region: Greece
---

# 40A max switching current 5-pin universal plug-in design Durable silver alloy contacts 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:** € 29.92
**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?** € 29.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/47024300-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:** Silver alloy contacts and high-grade materials guarantee longevity and reliability
- • **Value-Packed 5-Pack:** Get five relays and sockets with a 2-year warranty—upgrade multiple systems at once
- • **Plug & Play Simplicity:** Unique male-female slot design ensures clean, hassle-free installation every time
- • **Color-Coded Convenience:** Wiring harness with distinct colors makes setup intuitive and error-free
- • **Power Up with Confidence:** Handles up to 40A at 14V DC for heavy-duty automotive accessories

## Overview

The Nilight 50003R is a premium 5-pin 12V SPDT automotive relay set rated for 40A switching current, featuring durable silver alloy contacts and a unique male-female socket design for effortless, clean installation. This 5-pack includes color-coded wiring harnesses compatible with a wide range of automotive devices, backed by a 2-year warranty for dependable performance under extreme conditions.

## Description

Nilight 12V 5-Pin Relay with 5-Pin Harness Socket (30A NC/40A NO) A relay is an electrically operated switch which use a smaller current to control a larger current. Functions as automatic adjustment, safety protection and conversion circuit. Specification Contact Capacity Normal Switching Capacity (Resistance load) NO (Normal Open) 40A 14VDC NC (Normal Closed) 30A 14VDC Max. Switching Current 40A Max. Switching Voltage 30VDC Max. Switching Power 560W Performance Parameter Contact Material: Silver Alloy Contact Resistance: 50mΩ Max. Operate Time (at nominal volt.): 10 msec. Max. Release Time (at nominal volt.): 5 msec. Max. Insulation Resistance: 100MΩ Min. (DC500V) Initial Dielectric Strength: - Between open contacts: AC500V, 50/60 Hz 1Min. - Between coil and contact: AC500V, 50/60 Hz 1Min. Vibration Resistance: - Functional: 10 ~ 55Hz at double amplitude of 1. 5 mm - Destructive: 10 ~ 55Hz at double amplitude of 1. 5 mm Shock Resistance: - Functional: 20G Min. - Destructive: 100G Min. Endurance (operations) Mechanical (at 7, 200 ops. /h): 10, 000, 000 Electrical (at 600 ops. /h): 100, 000 Ambient Temperature: -40 degree Celsius ~ +125 Degree Celsius (no condensation) Application Pre-wired relay with harness socket, compatible with almost all kinds of automotive devices that use a 12V DC power source. Widely used for car lights, fog lamps, headlights, seat warming, windshield wiper, starter, fans, speakers, traction control systems, etc.

Review: Good value, well made, - Nice packet of 12v 5-Pin automotive relays with attached pigtail connectors. Appear well made, well marked, good materials used and have built in mounting tabs which are a plus. Nice 30/40 Amp rated, comparable with most common 5-Pin 12V relays found on automotive accessory devices. Easy to install using the pigtail wiring instead of having to make individual connectors. The 5 pack is a good value for anyone adding accessories like lighting to a vehicle.
Review: Nice - They work great. Fast, easy, good price.

## 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 | #7,925 in Automotive ( See Top 100 in Automotive ) #5 in Automotive Replacement Starter Relays |
| Brand | Nilight |
| Brand Name | Nilight |
| Coil Resistance | 50 milliohms |
| Coil Voltage | 12 volts |
| Connector Type | Plug-In |
| Contact Current Rating | 40 A |
| Contact Material | Silver Copper |
| Contact Type | Spdt |
| Current Rating | 40 A |
| Customer Reviews | 4.6 out of 5 stars 3,402 Reviews |
| Global Trade Identification Number | 00600537013346 |
| Included Components | 5PCS Relay Harness Set |
| Item Type Name | Nilight Automotive Relay Harness Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness - 5 Pack，2 Years Warranty |
| Item Weight | 8 ounces |
| Manufacturer | Nilight |
| Maximum Switching Current | 40 A |
| Maximum Switching Voltage | 30 volts_of_direct_current |
| Minimum Switching Voltage | 30 volts_of_direct_current |
| Model | 50003R |
| Mounting Type | Surface Mount |
| Number of Items | 1 |
| Operation Mode | Automatic |
| Part Number | NI-RE05 |
| Specification Met | UL |
| UPC | 600537013346 |
| Upper Temperature Rating | 125 °C |
| Warranty Description | 2 Years Warranty |
| Wattage | 560 watts |

## Product Details

- **Connector Type:** Plug-In
- **Contact Material:** Silver Copper
- **Contact Type:** Spdt
- **Current Rating:** 40 A
- **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 **Color** 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

### ⭐⭐⭐⭐⭐ Good value, well made,
*by T***T on July 14, 2026*

Nice packet of 12v 5-Pin automotive relays with attached pigtail connectors. Appear well made, well marked, good materials used and have built in mounting tabs which are a plus. Nice 30/40 Amp rated, comparable with most common 5-Pin 12V relays found on automotive accessory devices. Easy to install using the pigtail wiring instead of having to make individual connectors. The 5 pack is a good value for anyone adding accessories like lighting to a vehicle.

### ⭐⭐⭐⭐⭐ Nice
*by O***L on July 16, 2026*

They work great. Fast, easy, good price.

### ⭐⭐⭐⭐⭐ Easy straight-forward wiring!
*by M***Z on February 29, 2024*

The price is certainly right! What I like about this product is that it includes the connection socket with colored wires. What I found difficult with this product is that the connection socket slots are not perfectly aligned to accept the blades of the relay assembly. (It appears the socket was assembled without care). If one attempts to insert the relay assembly with force, it will damage the socket since not all of the blades line up to the haphazardly assembled socket. One has to first carefully match the relay blades to each slot in the socket by slightly bending the ones that don't fit precisely. Then the relay will insert without damage or difficulty. My brother's Jeep has messed up wiring in the low beam headlight circuit somewhere in the wiring loom. We used one of these relays to just rewire the low beam circuit to go around the bad wiring. The relay is controlled by the regular low beam switch on the steering column so the car still functions as if its original wiring was still in play. (We disconnected the original wiring from the low beam light filaments and replaced it with the output of the newly installed relay)! So far, it has been working perfectly for the past 2 weeks! What is still a mystery is how long will this relay continue to function seeing as it is from China? As an aside, one should 'cap off', (or at least tape off), the end of the unused red wire. It is a funtional wire connection to the relay that is not normally used.

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-09-09*