---
product_id: 552023749
title: "12V Fuse Relay Box with 4 Relays, 12 ATC/ATO Fuses, Pre-Wired, Black, Panel Mount, Automatic Operation, Automotive Fuse Holder"
brand: "rvboatpat"
price: "€ 66.75"
currency: EUR
in_stock: true
reviews_count: 5
category: "Rvboatpat"
url: https://www.desertcart.sk/products/552023749-12v-fuse-relay-box-with-4-relays-12-atc-ato
store_origin: SK
region: Slovakia
---

# 4x 40A 4-pin relays 12 pre-installed ATC/ATO fuses Pre-wired for faster setup 12V Fuse Relay Box with 4 Relays, 12 ATC/ATO Fuses, Pre-Wired, Black, Panel Mount, Automatic Operation, Automotive Fuse Holder

**Brand:** rvboatpat
**Price:** € 66.75
**Availability:** ✅ In Stock

## Summary

> ⚡ Fuse your circuits with power and precision — stay connected, stay ahead!

## Quick Answers

- **What is this?** 12V Fuse Relay Box with 4 Relays, 12 ATC/ATO Fuses, Pre-Wired, Black, Panel Mount, Automatic Operation, Automotive Fuse Holder by rvboatpat
- **How much does it cost?** € 66.75 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/552023749-12v-fuse-relay-box-with-4-relays-12-atc-ato)

## Best For

- rvboatpat enthusiasts

## Why This Product

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

## Key Features

- • **Plug & Play Simplicity:** Pre-wired design slashes installation time, making complex wiring projects approachable and hassle-free.
- • **Power-packed Protection:** Equipped with four robust 40A relays to handle high-demand circuits safely and efficiently.
- • **Ready-to-Use Fuse Array:** Includes 12 assorted ATC/ATO blade fuses (10A, 20A, 25A, 30A) to cover diverse automotive needs right out of the box.
- • **Sleek & Secure Mounting:** Front panel mount design ensures a clean, organized setup with waterproof protection for reliable performance in any environment.
- • **Versatile Vehicle Compatibility:** Perfectly suited for cars, trucks, boats, and more—keeping your circuits neat and your gear running smoothly.

## Overview

The RVBOATPAT 12V Fuse Relay Box combines four 40A relays and twelve assorted ATC/ATO fuses in a pre-wired, panel-mount design. Engineered for automotive and marine applications, it offers a waterproof, organized solution that simplifies installation and enhances circuit protection across multiple vehicle types.

## Description

SPECIFICATIONS: Fuse Type: ATC & ATO Fuse; Voltage: 12V/24V; Feature: 1.The relay fuse box will come with 4 pieces of relays for use, which is 4 pin design, makes the wiring and installation much easier and more convenient.; 2.The fuse relay box will also come with 12 pieces of fuses, which includes 3 x 10A, 3 x 20A, 3 x 25A and 3 x 30A, convenient for you to use immediately; 3.This fuse block with relay is pre-wired design, which finishes half of connection work, and provide instructions for the rest wires, makes the connection much easier for you.;

Review: Disappointed with the power feed wiring to the relays. They used 2.5mm² wiring as power feed to the relay, which is good for 25amp. They provide 40amp relays, so it's not safe to use those relays above 25amp. Provides a real limitation.
Review: Worked well has multiple relays and lots of wiring. Note that all the grounds are looped together so if you want the ground side control, you will have to modify this relay pack overall the qualities quite decent and works as advertised.

## Features

- Pre-wired - This fuse relay box is pre-wired design, completing half of the connection work, makes the entire connection process faster and time-saving.
- Capacity - This fuse and relay box can max hold 4 relays and 12 fuses at the same time, making multiple relays in one box, keeps your circuit neat and tidy.
- New Installation Design - The front mounting design can safely install the relay fuse box anywhere. The waterproof fuse relay block is designed to provide a reliable and safe environment for the use of equipment and keep the connection system clean. It is applicable to cars, trucks, ships, etc.
- 40A Relay - This relay box 12v automotive will be equipped with 4 pieces of 4 pin 40A relays, provide the highest rating to make its application wider and safer.
- Various Size Fuses - This auto fuse block will also come with 12 pieces of ATC/ATO fuses, which includes 3 x 10A, 3 x 20A, 3 x 25A, and 3 x 30A blade fuses, can meet a wide range of using requirements.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BY7MGR78 |
| Best Sellers Rank | #104,417 in Automotive ( See Top 100 in Automotive ) #97 in Car Fuse Holders |
| Item model number | RB-R4F12-W1-4P |
| Manufacturer | RVBOATPAT |
| Product Dimensions | 20 x 8 x 12 cm; 608 g |

## Product Details

- **Connector type:** Through Hole" Or "Surface Mount
- **Contact material:** Silver Alloy
- **Contact type:** Normally Closed, Normally Open
- **Current rating:** 30 Amps
- **Mounting type:** Panel Mount

## Images

![12V Fuse Relay Box with 4 Relays, 12 ATC/ATO Fuses, Pre-Wired, Black, Panel Mount, Automatic Operation, Automotive Fuse Holder - Image 1](https://m.media-amazon.com/images/I/81pb05TLOmL.jpg)

## Customer Reviews

### ⭐⭐ Review
*by J***. on 20 July 2025*

Disappointed with the power feed wiring to the relays. They used 2.5mm² wiring as power feed to the relay, which is good for 25amp. They provide 40amp relays, so it's not safe to use those relays above 25amp. Provides a real limitation.

### ⭐⭐⭐⭐ Review
*by D***N on 22 November 2025*

Worked well has multiple relays and lots of wiring. Note that all the grounds are looped together so if you want the ground side control, you will have to modify this relay pack overall the qualities quite decent and works as advertised.

### ⭐⭐⭐⭐⭐ Review
*by S***H on 31 December 2023*

For the price, this is a solid box! Having the 4 relays and extra fused power slots is a bonus. Another reviewer already mentioned how it's wired so I won't go into that part, but 2x red wires are main power, black is the daisy-chained ground, white is your trigger wires, yellow goes to your relayed devices, and the blues are just regular fused power. I used this in my 2002 VW Golf for a couple sets of fog lights, underhood lighting, and a lift pump. I wanted to clean up the battery terminals. As you can see in my images, I basically connected the 14 AWG power wires together, which gives this entire box around 40-50A rating. I'm protecting the entire box with a resettable, 40A breaker as a "just in case". From the breaker to the battery I just made an 8AWG jumper which can also handle 40A. The box mounts up nicely with some M6 screws. Couple things to note: Box is NOT waterproof. So place accordingly. As well, the included fuses are cheap. Probably won't last long but I'll run them until they go.

## Frequently Bought Together

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