4 Channel Relay Shield for Arduino UNO

SKU:DFR0144 Brand:DFRobot Reward Points: 140
In Stock
Topic: Arduino
Quantity Based Price
  • 3-4$13.40
  • 5-9$13.20
  • 10+$12.70
* Model:
Expected Restock Date: [[restockDate]]


This is a 4-channel optpcoupler-isolated relay Arduino UNO Shield, capable of controlling high-power devices operating at AC 240V 5A or DC 24V 5A for each channel.

In a home automation project, relay modules play a crucial role in managing devices such as lights, pumps, garage doors, speakers, power outlets, and fans. However, traditional relay modules are burdened by space requirements, intricate wiring, and a potential for unreliable operation. Moreover, low-quality relay modules lacking optocoupler isolation compromise the safety of the entire project.

By adopting the Arduino Shield approach, this product not only eliminates the need for complex wiring but also provides a substantial boost to project reliability. Through the integration of a 4-channel relay, it enables an Arduino UNO mainboard to exercise comprehensive control over a diverse range of devices.

4 channel relay shield for arduino

4 Channel Relay Shield for Arduino

Furthermore, this expansion board boasts an XBee interface in addition to 14 3-pin digital ports and 6 3-pin analog ports. With the inclusion of the XBee interface, users have the freedom to integrate wireless modules like Bluetooth, WiFi, or Zigbee, unlocking a realm of advanced capabilities such as IoT integration, seamless smart home integration, convenient mobile control, and efficient coordination among multiple devices.

arduino uno relay shield boasts an XBee interface

Arduino Uno Relay Shield Boasts an XBee Interface

With its 4-channel optocoupler isolation and independent power supply features, this relay expansion board effectively isolates the electrical connection between AC and DC, guaranteeing the utmost electrical safety. This meticulous design effectively eliminates any potential electromagnetic interference, thereby safeguarding the Arduino mainboard from the perils of high-voltage electrical signals and mitigating the risk of damage.


  • Compatible with Arduino UNO Rev3
  • Each Relay has its own test button to test the connection
  • Standard DFRobot 3 Pin out
  • XBee I/O direct control


arduino 4 channel relay shield applications


  • Compatible with Arduino UNO Rev3
  • 4 buttons to test module
  • LED status indicator of relay
  • Support Xbee IO directly control
  • Xbee socket for wireless communication
  • Selectable digital IO pin for control (Default digital 2,7,8,10) 
  • 6 channels Analog IO & 13 channels Digital IO 
  • Up to 4 Relay with photo-coupled circuit
  • Contact Rating  3A AC 120V / DC 24V
  • Max Switching Voltage  AC 240V / DC 60V (Less than 38V is recommended)
  • Max Switching Current  5A
  • Max Switching Power  AC 360VA / DC 90W
  • Electrical Life (Min)  100,000 Operations
  • Mechanical Life (Min)  10,000,000 Operations
  • Safety Standard(relay)  UL cUL TUV CQC
  • Coil Working Voltage  9VDC
  • Working temperature  -30℃ to +85℃
  • Working Humidity  40% - 85%
  • Size: 95x65mm


Project1. IR Home Automation based on DFRobot's Relay Shield

Introduction: Everyone wants a remote to control all the appliances in your home. Some companies are introducing wireless controllers for various appliances but they are costly and you have to upgrade the existing for additional cost. what about making your own home automation system to control up to 4 appliances.


Shipping List

  • Relay Shield for Arduino V2.1          x1
  • Nylon stand-off with screw               x2




4 Channel Relay Shield for Arduino UNO

In Stock
  • 3-4$13.40
  • 5-9$13.20
  • 10+$12.70