4 Channel Relay Module

The 4 Channel Relay Module is a reliable and easy-to-use interface board that allows a microcontroller to control up to eight high-power electrical devices safely and independently. Each relay works as an electrically operated switch, making this module ideal for switching AC or DC loads such as lights, fans, motors, pumps, and appliances.

Designed for compatibility with popular development boards like Arduino, Raspberry Pi, ESP8266, ESP32, and PIC, this module comes with optocoupler isolation (on most variants) to protect low-voltage control circuits from high-voltage spikes. It is widely used in home automation, industrial control, and DIY electronics projects.

Key Features

• 4 independent relay channels

• Supports AC and DC load switching

• Control voltage: 5V (logic compatible with most microcontrollers)

• Relay rating: 10A @ 250VAC / 10A @ 30VDC (typical)

• Opto-isolated inputs for better safety and noise immunity

• LED indicators for each relay status

• Screw terminals for secure and easy wiring

• Low trigger current, microcontroller friendly

• Compact PCB design

Specifications

• Number of channels: 4

• Operating voltage: 5V DC

• Trigger type: LOW or HIGH level (model dependent)

• Contact type: NO (Normally Open), NC (Normally Closed), COM

• Load capacity:

  • 250VAC @ 10A

  • 30VDC @ 10A

Applications

• Home automation systems

• Smart switch panels

• Industrial automation

• IoT control projects

• Robotics and DIY projects

• Controlling lights, fans, motors, pumps, heaters

• PLC and microcontroller-based control systems

Package Includes

• 1 × 4 Channel Relay Module