---
product_id: 453236678
title: "MAKINGTEC Automotive Waterproof Relay, 4-PIN 40/30 AMP 12 V DC Waterproof Relay with Harness - Heavy Duty 12 AWG Tinned Copper Wires 2 Pack SPST Automotive Relay"
brand: "makingtec"
price: "€ 28.40"
currency: EUR
in_stock: true
url: https://www.desertcart.hr/products/453236678-makingtec-automotive-waterproof-relay-4-pin-40-30-amp-12
store_origin: HR
region: Croatia
---

# 40/30 AMP Waterproof 12 AWG Wire MAKINGTEC Automotive Waterproof Relay, 4-PIN 40/30 AMP 12 V DC Waterproof Relay with Harness - Heavy Duty 12 AWG Tinned Copper Wires 2 Pack SPST Automotive Relay

**Brand:** makingtec
**Price:** € 28.40
**Availability:** ✅ In Stock

## Summary

> 🔧 Power Up Your Ride with Confidence!

## Quick Answers

- **What is this?** MAKINGTEC Automotive Waterproof Relay, 4-PIN 40/30 AMP 12 V DC Waterproof Relay with Harness - Heavy Duty 12 AWG Tinned Copper Wires 2 Pack SPST Automotive Relay by makingtec
- **How much does it cost?** € 28.40 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/453236678-makingtec-automotive-waterproof-relay-4-pin-40-30-amp-12)

## Best For

- makingtec enthusiasts

## Why This Product

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

## Key Features

- • **Robust Performance:** Handles up to 40/30 AMP, perfect for heavy-duty applications.
- • **Unmatched Durability:** Engineered for extreme conditions, ensuring longevity.
- • **Effortless Installation:** Designed for quick setup with clear wiring diagrams.
- • **Versatile Compatibility:** Works seamlessly with both positive and negative activation.
- • **Weather-Resistant Design:** IP-rated for water and dust resistance, keeping your connections safe.

## Overview

The MAKINGTECA Automotive Waterproof Relay is a heavy-duty 4-PIN relay designed for 12 V DC applications. With a robust 40/30 AMP capacity and 12 AWG tinned copper wires, this relay ensures reliable performance in challenging environments. Its waterproof and dustproof features make it ideal for automotive use, while the easy installation process allows for quick setup. Perfect for both positive and negative activation, this relay is a must-have for any serious automotive enthusiast.

## Description

MAKINGTECAutomotive Waterproof Relay, 4-PIN 40/30 AMP 12 V DC Waterproof Relay with Harness - Heavy Duty 12 AWG Tinned Copper Wires 2 Pack SPST Automotive Relay

## Features

- Never go beyond its capabilities. Try to stay 10 to 15% below what the rate is for Please make sure you made tight connections
- 12-volt 4-prong relay. Excellent water-repellent and dustproof ability, but not using it in water
- For the people whose relays are burning, please make sure you are making tight connections (especially on the load wires), read the specs on the item description, and ensure that the operating environment meets the safety requirements of the relay
- Be careful when inserting the relay into the socket. If you force it, you will bend the female connectors
- Thick 12 gauge wire for the load terminals. Easy to install just make sure you follow the wiring diagram. Works for both positive and negative activation

## Images

![MAKINGTEC Automotive Waterproof Relay, 4-PIN 40/30 AMP 12 V DC Waterproof Relay with Harness - Heavy Duty 12 AWG Tinned Copper Wires 2 Pack SPST Automotive Relay - Image 1](https://m.media-amazon.com/images/I/51TlPWbZyjL.jpg)

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**Shop now:** [https://www.desertcart.hr/products/453236678-makingtec-automotive-waterproof-relay-4-pin-40-30-amp-12](https://www.desertcart.hr/products/453236678-makingtec-automotive-waterproof-relay-4-pin-40-30-amp-12)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-05-19*