---
product_id: 284109148
title: "KEYESTUDIO Relays for Arduino KS0251"
brand: "keyestudio"
price: "€ 28.44"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.ie/products/284109148-keyestudio-relays-for-arduino-ks0251
store_origin: IE
region: Ireland
---

# Supports AC120V/3A & DC24V/3A loads Onboard LED status indicators 4-channel 5V relay control KEYESTUDIO Relays for Arduino KS0251

**Brand:** keyestudio
**Price:** € 28.44
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Command your smart projects with power and style!

## Quick Answers

- **What is this?** KEYESTUDIO Relays for Arduino KS0251 by keyestudio
- **How much does it cost?** € 28.44 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/284109148-keyestudio-relays-for-arduino-ks0251)

## Best For

- keyestudio enthusiasts

## Why This Product

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

## Key Features

- • **Eco-Friendly & Safe:** Crafted with environmentally responsible materials and tested for quality and safety.
- • **Visual Status Feedback:** Built-in LEDs keep you instantly informed of relay activation—no guesswork needed.
- • **Sleek & Functional Design:** Striking yellow-on-black PCB not only looks professional but makes pin labels crystal clear.
- • **Seamless UNO R3 Integration:** Stack directly on your Keyestudio UNO R3 for plug-and-play control without messy wiring.
- • **Powerful & Reliable Switching:** Handles up to 3A at AC120V or DC24V, perfect for robust home automation projects.

## Overview

The KEYESTUDIO KS0251 is a 4-channel 5V relay shield designed for seamless stacking on the Keyestudio UNO R3 board. It supports high-level triggering to control devices up to 3A at AC120V or DC24V, featuring onboard LED indicators for real-time relay status. Its eye-catching yellow and black design enhances usability, while environmentally friendly manufacturing ensures safety and quality. Ideal for millennial makers seeking reliable, stylish, and efficient home automation control.

## Description

WHY CHOOSE KEYESTUDIO! 1.EXCELLENT QUALITY solder is very clean, everything is aligned nicely, all boards are well packed after function,voltage, current testing 2.COOL YELLOW BLACK DESIGN The yellow trim is definitely a departure from the standard, dull, black boards, and the yellow silk screen on black mask really pops, making it easy to read the pin labels 3. REALLY SAFE This board made from environmentally friendly components and materials, as well as environmentally friendly production technology Specification 1.Working Style: high level is effective. 2.Contact Capacity: AC120V /3A DC24V/3A 3.Weight: 39.4g 4.Size:69*53*27mm 5.Fully compatible with UNO R3 board 6.Indicator LED onboard for Relay output status

Review: Totally recommend I just don’t have a use for it yet but GPIO works great on it I have the keystudio arduino clones I find them more visually appealing and pleasing. Very high quality.
Review: It is not obvious how to connect this to a Raspberry Pi but it works well with an Arduino Uno and a sample program is available.

## Features

- It will integrate 4-channel 5V relay module, which is fully compatible with keyestudio UNO R3 control board
- Work through stacking shield on the keyestudio UNO R3 control board, which is very easy and convenient
- The 4-channel relay of shield is for high level effectively
- And 4-channel relay control port should respectively connect with the digital port 4, 5, 6, 7 which is on the keyestudio UNO R3 control board
- Only need to control the high and low level outputs of digital port 4, 5, 6, 7 on the 4-channel relay, which can achieve to control the relay switch

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07B2FTZD1 |
| ASIN  | B07B2FTZD1 |
| Batteries Included? | No |
| Batteries Required? | No |
| Customer Reviews | 4.5 4.5 out of 5 stars (68) |
| Customer reviews | 4.5 4.5 out of 5 stars (68) |
| Date First Available | 8 April 2018 |
| Date First Available  | 8 April 2018 |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 40.8 g |
| Item model number | KS0251 |
| Item model number  | KS0251 |
| Manufacturer | keyes |
| Manufacturer  | keyes |
| Part number | ks0251 |
| Plug Profile | PCB Mount |
| Product Dimensions | 6.91 x 5.31 x 2.31 cm; 40.82 g |
| Product Dimensions  | 6.91 x 5.31 x 2.31 cm; 40.82 g |
| Style | 4 Channel Relay Shield |
| Volume | 8569.8 Cubic Centimeters |
| Wattage | 15 watts |

## Product Details

- **Connector type:** Through Hole
- **Contact material:** Silver Tin Oxide
- **Contact type:** Normally Open
- **Current rating:** 3 Amps
- **Mounting type:** PCB Mount

## Images

![KEYESTUDIO Relays for Arduino KS0251 - Image 1](https://m.media-amazon.com/images/I/61mls31xU6L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by N***Y on 13 December 2025*

Totally recommend I just don’t have a use for it yet but GPIO works great on it I have the keystudio arduino clones I find them more visually appealing and pleasing. Very high quality.

### ⭐⭐⭐⭐⭐ Review
*by K***S on 28 December 2020*

It is not obvious how to connect this to a Raspberry Pi but it works well with an Arduino Uno and a sample program is available.

### ⭐⭐⭐⭐⭐ Review
*by T***A on 12 September 2018*

AC120V DC24Vと耐圧は少し低めではありますが、arduinoからの電源供給からで動作させることができる 非常に使い勝手のいいリレーモジュールです。動作確認用にLEDも内蔵されているので、動作状況も目視できます。 耐圧さえ範囲内であれば、非常におすすめです

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---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-01-23*