5V 4 Channel Relay Module with Optocoupler (10A Opto-Isolated Relay Board)

The 5V 4 Channel Relay Module with Optocoupler is a reliable relay interface board designed to control four independent high-voltage or high-current loads using low-voltage digital control signals. Each relay channel is electrically isolated through an onboard optocoupler, protecting the controlling microcontroller from voltage spikes, electrical noise, and ground loops. Compatible with Arduino, ESP32, ESP8266, STM32, Raspberry Pi (with appropriate logic level), PLCs, and other development platforms, this module is ideal for home automation, industrial automation, IoT, robotics, and embedded electronics projects.

Key Features -

• Operates on 5V DC control voltage

• Four independent relay channels

• Built-in optocoupler isolation

• Supports high-voltage AC and DC load switching

• LED status indicators for each relay

• Screw terminal connections for secure wiring

• TTL logic compatible

• Reliable mechanical relays

• Easy microcontroller interfacing

• Ideal for automation and control systems

Specifications -

• Product type - Relay Module

• Control voltage - 5V DC

• Number of relay channels - 4

• Relay type - Mechanical Relay

• Isolation - Optocoupler Based

• Maximum switching voltage - 250V AC / 30V DC

• Maximum switching current - 10A per Channel

• Input interface - TTL Logic Level

• Output terminals - NO, NC and COM for Each Relay

• Mounting type - PCB Module

Applications -

• Home automation

• Industrial automation

• Smart lighting control

• Motor control

• Pump control

• Appliance switching

• IoT projects

• Embedded electronics