1 Channel USB Control Switch Relay Module Intelligent Control

The 1 Channel USB Control Switch Relay Module Intelligent Control is a compact and easy-to-use USB-controlled relay module that allows users to switch high-voltage or high-current electrical devices directly from a computer or compatible USB host. Equipped with a single relay channel, this module provides reliable isolation between the low-voltage USB control circuit and the connected load, making it suitable for automation, testing, industrial control, and DIY electronics projects.

Powered directly through a USB interface, the module requires no additional power supply for its control circuitry. It can be integrated with PC software or custom applications to remotely control lights, motors, fans, pumps, solenoids, and other AC or DC loads. Its compact design and simple operation make it an excellent choice for students, hobbyists, engineers, and automation enthusiasts.

Key Features of the USB Control Switch Relay Module

• Single Channel USB Relay Module
• Intelligent USB Control
• Plug-and-Play USB Interface
• Controls AC and DC Electrical Loads
• Built-In Relay Isolation
• LED Power and Relay Status Indicators
• Compact and Durable PCB Design
• Easy Integration with PC Applications
• Suitable for Automation and Remote Switching
• Ideal for DIY and Industrial Projects

Technical Specifications

• Product Type: USB Relay Module
• Relay Channels: 1
• Control Interface: USB
• Input Voltage: 5V DC (USB Powered)
• Relay Type: Electromechanical Relay
• Relay Contact Type: SPDT (Normally Open, Normally Closed, Common)
• Maximum Switching Voltage: 250V AC / 30V DC
• Maximum Switching Current: 10A (Resistive Load)
• Isolation: Relay Electrical Isolation
• Status Indicator: Power LED and Relay LED
• Mounting Type: PCB Module
• Operating Temperature: Typically -20°C to +70°C

Pin and Terminal Configuration

USB Interface

• USB Port: Power supply and control communication

Relay Output Terminals

• COM: Common Terminal
• NO: Normally Open Contact
• NC: Normally Closed Contact

How the USB Relay Module Works

The module receives power and control commands through its USB connection. When a control signal is sent from the connected computer or compatible software, the onboard circuitry energizes the relay coil.

• In the OFF state, the COM terminal is connected to NC.
• When activated, the relay switches the COM terminal to NO, allowing the connected load to be powered.

This electrical isolation enables safe control of higher-voltage AC or DC devices using low-voltage USB signals.

Applications and Uses

• Home Automation Systems
• PC-Controlled Switching
• Industrial Equipment Control
• Smart Office Automation
• Lighting Control
• Fan and Motor Switching
• Pump Control
• Laboratory Equipment
• Security and Access Control Systems
• DIY Electronics and Embedded Projects

Advantages and Benefits

• Simple USB plug-and-play operation
• No external control power required
• Safe relay isolation between control and load
• Supports both AC and DC switching
• Compact and lightweight design
• Easy integration into automation systems
• Reliable and stable performance
• Suitable for beginners and professionals

Usage Tips and Safety Guidelines

• Ensure the connected load does not exceed the relay’s rated voltage and current.
• Disconnect power before wiring AC loads.
• Use properly insulated wiring for mains voltage applications.
• Install the module in a dry, well-ventilated enclosure for long-term reliability.
• Verify software or driver compatibility with your operating system before use.
• Do not touch exposed terminals while the module is connected to live AC voltage.

Note: Images are for illustration purposes only.