4 Channel 5V Relay Module

The 4 Channel 5V Relay Module is a reliable switching module designed to allow low-voltage microcontrollers and development boards to safely control high-voltage or high-current AC and DC electrical devices. It features four independent relay channels, enabling multiple loads to be switched simultaneously using digital control signals. This makes it an excellent solution for automation, robotics, industrial control, and IoT applications.

Operating from a 5V DC supply, the module is compatible with popular development platforms such as Arduino, ESP8266, ESP32, AVR, PIC, STM32, and other TTL-based microcontrollers. Each relay can independently switch loads of up to 10A at 250VAC or 10A at 30VDC, making the module suitable for controlling lights, fans, pumps, motors, solenoid valves, and various household or industrial appliances.

Many versions of the module include optocoupler isolation, which electrically isolates the control circuit from the relay switching circuit to improve safety and protect sensitive electronics from voltage spikes and electrical noise. LED status indicators are provided for each relay channel, allowing users to easily monitor relay operation, while screw terminal connectors ensure secure and convenient wiring of external loads.

The 4 Channel 5V Relay Module is widely used in smart home systems, industrial automation, remote switching, embedded systems, robotics, security systems, and educational electronics projects where safe and dependable switching of electrical devices is required.

Features

• Four independent relay channels.

• Operates from a 5V DC power supply.

• Compatible with TTL logic control signals.

• Supports switching up to 10A at 250VAC or 10A at 30VDC.

• Suitable for both AC and DC load control.

• Optocoupler isolation for improved safety (model dependent).

• LED indicators for each relay channel.

• Screw terminal connectors for secure wiring.

• Reliable electrical isolation between control and load circuits.

• Easy interface with Arduino, ESP8266, ESP32, STM32, AVR, PIC, and other microcontrollers.

• Compact PCB design for easy installation.

• Ideal for DIY, educational, and industrial applications.

Applications

• Home automation systems

• Industrial automation

• IoT projects

• Smart lighting control

• Motor and pump control

• Fan and appliance switching

• Security and alarm systems

• Robotics projects

• Remote-controlled electrical devices

• Embedded system development

• Electronic prototyping

• Educational electronics experiments