4 Channel 5V Relay Board

The 4 Channel 5V Relay Board is a versatile relay interface module designed to allow low-voltage microcontrollers to safely control high-voltage AC and DC devices. Featuring four independently controlled relay channels, opto-isolated inputs, and high-current relay outputs, it is ideal for automation, smart home systems, industrial control, robotics, Arduino projects, Raspberry Pi applications, and IoT solutions. Its compact design and reliable switching performance make it an essential component for both hobbyists and professional automation systems.

Product Features

Four Independent Relay Channels

Controls up to four electrical devices independently using a single relay module.

5V DC Operating Voltage

Operates on a standard 5V DC power supply, making it compatible with most microcontroller platforms.

High Current Switching Capacity

Each relay supports switching loads of up to 10A at 250V AC or 10A at 30V DC, suitable for controlling lights, motors, pumps, and other electrical equipment.

Opto-Isolated Inputs

Provides electrical isolation between the control circuit and relay outputs, improving safety and protecting connected controllers from voltage spikes.

TTL Logic Compatible

Can be controlled directly by Arduino, Raspberry Pi, ESP32, ESP8266, AVR, PIC, ARM, STM32, and other TTL-compatible microcontrollers.

LED Status Indicators

Each relay channel includes an LED indicator to display relay activation status for easy monitoring and troubleshooting.

Standard Screw Terminal Outputs

Features clearly labelled COM, NO, and NC terminals for secure and convenient wiring.

Reliable Electromechanical Relays

Built with durable relays designed for stable switching performance and long service life.

Easy Installation

Compact PCB layout with mounting holes allows quick integration into control panels and electronic projects.

Wide Range of Applications

Suitable for home automation, industrial automation, security systems, irrigation systems, robotics, lighting control, and DIY electronic projects.

Product Specifications

• Product Type: 4-Channel Relay Module
• Number of Channels: 4
• Operating Voltage: 5V DC
• Relay Type: Electromechanical
• Trigger Type: Active Low
• Input Isolation: Opto-Isolated
• Logic Compatibility:3V/5V TTL
• Maximum AC Load: 250V AC, 10A per Channel
• Maximum DC Load: 30V DC, 10A per Channel
• Relay Contacts: COM, NO, NC
• Driver Current: Approximately 15–20 mA per Channel
• Status Indicators: Power LED and Individual Relay LEDs
• Mounting: PCB Mount with Fixing Holes
• Compatible Platforms: Arduino, Raspberry Pi, ESP32, ESP8266, AVR, PIC, ARM, STM32, 8051, MSP430
• Applications: Home Automation, Industrial Control, IoT Systems, Smart Agriculture, Robotics, Security Systems, Electrical Switching, and DIY Electronics.