4 Channel 5V Relay Module with Optocoupler

The 4 Channel 5V Relay Module with Optocoupler is a robust and reliable module designed for controlling multiple high-voltage devices from microcontrollers such as Arduino, ESP32, ESP8266, and Raspberry Pi. Each relay is electrically isolated using onboard optocouplers, providing protection to your microcontroller against voltage spikes and surges.

Each channel supports up to 10A at 250V AC or 30V DC, making it suitable for switching appliances, lights, fans, pumps, and other heavy electrical loads. The module features active-low triggering, onboard status LEDs, and screw terminals for easy wiring.

Key Features:

• 4-channel 5V relay board with opto-isolation
• Relay rating: 10A 250VAC / 10A 30VDC
• Optocouplers for electrical isolation and protection
• Active-low trigger inputs (compatible with 3.3V/5V logic)
• Status indicator LEDs for each relay
• Screw terminals for relay outputs
• Works with Arduino, ESP32, Raspberry Pi, STM32, and more
• Ideal for home automation, robotics, and industrial control

Applications:

• Smart home control systems
• AC and DC appliance switching
• IoT automation
• Industrial relay-based control panels
• Lighting and HVAC control
• Multi-device control from a single board