---
product_id: 217285035
title: "1-Channel 30A High Current 5V Contactor Relay Switch Power Switch DC Power Switching Control Board Module Electrical Relay switches for Cooler Heater Refit Water Heater Control (DC 5V)"
brand: "knacro"
price: "€ 23.68"
currency: EUR
in_stock: true
url: https://www.desertcart.pt/products/217285035-1-channel-30a-high-current-5v-contactor-relay-switch-power
store_origin: PT
region: Portugal
---

# 30A Load Capacity 5V-24V Input Range High-Quality Optocoupler 1-Channel 30A High Current 5V Contactor Relay Switch Power Switch DC Power Switching Control Board Module Electrical Relay switches for Cooler Heater Refit Water Heater Control (DC 5V)

**Brand:** knacro
**Price:** € 23.68
**Availability:** ✅ In Stock

## Summary

> 🔋 Power Up Your Projects with Confidence!

## Quick Answers

- **What is this?** 1-Channel 30A High Current 5V Contactor Relay Switch Power Switch DC Power Switching Control Board Module Electrical Relay switches for Cooler Heater Refit Water Heater Control (DC 5V) by knacro
- **How much does it cost?** € 23.68 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/217285035-1-channel-30a-high-current-5v-contactor-relay-switch-power)

## Best For

- knacro enthusiasts

## Why This Product

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

## Key Features

- • **Compact Design:** Space-saving design without compromising on power.
- • **Stability Assured:** Features an ultra-small optocoupler for anti-interference.
- • **Versatile Voltage:** Compatible with 5V, 12V, and 24V DC inputs.
- • **Powerful Performance:** Handles up to 30A for robust applications.
- • **Reliable Connections:** Equipped with standard 30A terminals for secure wiring.

## Overview

The KNACRO 1-Channel 30A High Current Contactor Relay Switch is a versatile and reliable solution for controlling DC power applications. With a wide input range of 5V to 24V and a robust load capacity of 30A, this module is perfect for powering coolers, heaters, and water heaters. Its high-quality optocoupler ensures stable performance and excellent anti-interference capabilities, making it a must-have for any professional looking to enhance their electrical projects.

## Description

1-Channel 30A High Current 5V Contactor Relay Switch Power Switch DC Power Switching Control Board Module Electrical Relay switches for Cooler Heater Refit Water Heater Control (DC 5V)

## Features

- Input: 5V 12V 24V DC (relay powered);
- Load:AC 250V 30A,DC 30V 30A;
- 30A High Current 12V Contactor relay Switch DC power Switching Control Board;
- Using high-quality ultra-small optocoupler, anti-interference ability, stable performance.
- Using 9.5mm black fence terminal, standard 30A terminal, stable and solid, reliable quality.

## Images

![1-Channel 30A High Current 5V Contactor Relay Switch Power Switch DC Power Switching Control Board Module Electrical Relay switches for Cooler Heater Refit Water Heater Control (DC 5V) - Image 1](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/81O5-0K1nUL.jpg)
![1-Channel 30A High Current 5V Contactor Relay Switch Power Switch DC Power Switching Control Board Module Electrical Relay switches for Cooler Heater Refit Water Heater Control (DC 5V) - Image 2](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/81pPzHyc9qL.jpg)
![1-Channel 30A High Current 5V Contactor Relay Switch Power Switch DC Power Switching Control Board Module Electrical Relay switches for Cooler Heater Refit Water Heater Control (DC 5V) - Image 3](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/61N2rX85MsL.jpg)
![1-Channel 30A High Current 5V Contactor Relay Switch Power Switch DC Power Switching Control Board Module Electrical Relay switches for Cooler Heater Refit Water Heater Control (DC 5V) - Image 4](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/61c3yzCVQBL.jpg)
![1-Channel 30A High Current 5V Contactor Relay Switch Power Switch DC Power Switching Control Board Module Electrical Relay switches for Cooler Heater Refit Water Heater Control (DC 5V) - Image 5](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/81ADj7sZn6L.jpg)

## Available Options

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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.pt/products/217285035-1-channel-30a-high-current-5v-contactor-relay-switch-power](https://www.desertcart.pt/products/217285035-1-channel-30a-high-current-5v-contactor-relay-switch-power)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-18*