---
product_id: 54901997
title: "Keyes 24V 2 Channel Relay Module MD-278 250V AC 28V DC Funduino"
brand: "funduino"
price: "€ 27.53"
currency: EUR
in_stock: true
url: https://www.desertcart.pt/products/54901997-keyes-24v-2-channel-relay-module-md-278-250v-ac
store_origin: PT
region: Portugal
---

# Keyes 24V 2 Channel Relay Module MD-278 250V AC 28V DC Funduino

**Brand:** funduino
**Price:** € 27.53
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Keyes 24V 2 Channel Relay Module MD-278 250V AC 28V DC Funduino by funduino
- **How much does it cost?** € 27.53 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/54901997-keyes-24v-2-channel-relay-module-md-278-250v-ac)

## Best For

- funduino enthusiasts

## Why This Product

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

## Description

This module is ideally suited to controlling multiple larger voltages with project. This is a 4 channel relay module which can be used to activate up to 250V AC and 28V DC. This allows you to build in device control, operating remote lights or triggering systems when the module is supplied with a signal. This signal can come from a range of sources including most standard microcontrollers.The module has 4 LEDs that inform of the state of the module. A red power activation LED that lights when a signal is received on the IN pin. When a signal is received a audible click can be heard as the relay triggers, connecting the output pins.On board the unit is a jumper that can provide overall control. For normal operation the jumper is kept in place. This allows any signal on the input pins to trigger the relays. Removing the jumper prevents this from happening. The jumper can then be replaced by a sensor or circuit of some kind that makes the connection under certain conditions. We are thinking along the lines of when its bright outside there is no need for lights - a photosensitive resistor.The pins are suited to standard sockets with a pin pitch of 2.54mm. Each relay has a set of screw terminals with labels to indicate the standard off state relationship between them. Please do not hesitate to contact us if you require further information regarding the module's operation.

## Features

- Logic Voltage: 24V<br>Logic Levels: 24V<br>Draw Current: 50 - 60mA<br>
- Relay Type: Electromechanical<br>Relay Channels: 4<br>Maximum Relay Ratings: 10A 250V AC<br>10A 28V DC<br>Relay Actuation Time: < 10ms<br>
- Communication Format: TTL Voltage<br>
- Mounting holes: M3 70/40mm<br>Pin pitch: 2.54<br>
- Operating Temperature: -40°C to 85°C (unconfirmed)<br>Number of Pieces: 1<br>

## Images

![Keyes 24V 2 Channel Relay Module MD-278 250V AC 28V DC Funduino - Image 1](https://images-eu.ssl-images-amazon.com/images/I/51vILpus7ML.jpg)
![Keyes 24V 2 Channel Relay Module MD-278 250V AC 28V DC Funduino - Image 2](https://images-eu.ssl-images-amazon.com/images/I/51dLjaEdUxL.jpg)
![Keyes 24V 2 Channel Relay Module MD-278 250V AC 28V DC Funduino - Image 3](https://images-eu.ssl-images-amazon.com/images/I/51B%2BkqDbgpL.jpg)
![Keyes 24V 2 Channel Relay Module MD-278 250V AC 28V DC Funduino - Image 4](https://images-eu.ssl-images-amazon.com/images/I/413YDv%2BVcpL.jpg)

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**Shop now:** [https://www.desertcart.pt/products/54901997-keyes-24v-2-channel-relay-module-md-278-250v-ac](https://www.desertcart.pt/products/54901997-keyes-24v-2-channel-relay-module-md-278-250v-ac)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-06-13*