Micro USB 5V 4-Channel Relay Module (USB Powered Relay Board for Arduino)

The Micro USB 5V 4-Channel Relay Module is a versatile relay board designed for switching AC and DC loads using Arduino, ESP32, Raspberry Pi, STM32, and other microcontroller platforms. Powered through a convenient Micro USB 5V input, it features four independent electromechanical relays that provide safe electrical isolation between low-voltage control circuits and high-voltage loads. Each relay can be controlled individually through digital input signals, making the module ideal for home automation, industrial control, robotics, IoT projects, and remote switching applications.

With onboard LED indicators and easy-to-use screw terminals, this relay module offers reliable performance for controlling lights, motors, pumps, solenoids, and other electrical equipment.

Key Features -

• Four independent relay channels

• 5V DC operation with Micro USB power input

• Compatible with Arduino, ESP32, Raspberry Pi, and STM32

• Individual digital control input for each relay

• Electrical isolation between control and load circuits

• Onboard LED indicators for relay status

• Screw terminal connections for easy wiring

• Suitable for AC and DC load switching

• Compact PCB module design

• Ideal for automation and IoT applications

Specifications -

• Product type - 4-Channel Relay Module

• Channel count - 4 Channels

• Operating voltage - 5V DC

• Power input - Micro USB 5V / 5V Header

• Relay type - Electromechanical Relay

• Control interface - Digital Logic Inputs

• Relay output - COM, NO, NC Contacts

• Status indication - LED Indicators

• Isolation - Electrical Isolation Between Control and Load

• Package / Mounting type - PCB Module

Applications -

• Home automation systems

• Smart lighting control

• Industrial automation

• Arduino and ESP32 projects

• Raspberry Pi automation

• Motor and pump control

• Solenoid and valve switching

• IoT remote switching systems

• Security and alarm systems

• DIY electronics projects