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SKU: VT-USB-RELAY-01

1-channel 5V USB Relay Module is a smart solution that allows you to control on/off external electrical devices directly from a computer via USB port. Ideal for Smart Home applications, automatic test systems, and DIY projects.

Power supply: 5V directly from USB port.
Load capacity: Withstands up to 10A/250VAC.
Control chip: High performance, stable (CH340 or HID).
Protection: Integrated overcurrent protection and flyback diode, enhancing relay durability.

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Product Overview

The 5V USB Relay Module is designed to connect a computer to the physical world. Instead of manual operation, you can program or use software to automatically turn on/off lights, fans, magnetic locks, or reboot network devices.

Key Features

Compact Design: High-quality PCB with convenient integrated USB Type-A or USB Type-B port, plugs directly into a computer without an adapter cable.
No External Power Required: Uses 5V power directly from the PC or Laptop USB port.
High Durability: Quality relay (SRD-05VDC-SL-C) with a lifespan of up to 100,000 switching cycles.
Safe: Circuit designed with overcurrent protection and a relay protection diode (Freewheeling Diode), ensuring safety for the computer's USB port.

Technical Specifications

Parameter	Details
Input Voltage	5V DC (via USB port)
Current Consumption	~300mA
Interface	USB (Serial COM or HID depending on version)
Relay Type	1 Channel – SRD-05VDC-SL-C
Max Load (AC)	10A 250V AC
Max Load (DC)	10A 30V DC
Dimensions	Compact, easy to integrate

User Guide (For LCUS-1 / CH340 Chip Version)

The product uses Serial communication via a virtual COM port.

Install the CH340 Driver on your computer.
Connect the Module to a USB port.
Use Terminal software or write code to send HEX commands at a Baud rate of 9600:
- Open Command (ON): A0 01 01 A2
- OFF Command: A0 01 00 A1