USB Relay Module CH340 Smart Switch LCUS-1/2/4/8 Channel
USB Relay Module CH340 Smart Switch LCUS-1/2/4/8 Channel
USB Relay Module CH340 – Intelligent USB Control Switch for Smart Home & Automation
Take control of your electrical devices with this versatile USB Relay Module featuring the CH340 USB-to-serial chip. Available in 1, 2, 4, and 8 channel configurations (LCUS-1, LCUS-2, LCUS-4, LCUS-8), this intelligent switch module lets you control AC and DC loads directly from your computer or microcontroller via a standard USB connection — no extra power supply needed.
Whether you're building a smart home system, automating lab equipment, or prototyping an IoT project, this relay module delivers reliable, programmable switching in a compact SMD package.
Key Features
- CH340 USB Chip: Plug-and-play USB connectivity with wide driver support across Windows, Linux, and macOS.
- Multiple Channel Options: Choose from 1, 2, 4, or 8 relay channels (LCUS-1 / LCUS-2 / LCUS-4 / LCUS-8) to match your project needs.
- High Load Capacity: Each relay rated at 10A @ 250VAC and 10A @ 30VDC — handles most household and industrial loads.
- Over-Current Protection: Built-in over-current safeguard for reliable, long-term operation.
- USB-Powered: Draws power directly from the USB port — no external supply required for the control circuit.
- Smart Home Ready: Ideal for home automation, remote switching, and DIY electronics projects.
- Compact SMD Package: Space-saving surface-mount design for easy integration into enclosures and project builds.
- Customizable: Supports custom configurations to suit specialized applications.
Technical Specifications
| Models Available | LCUS-1, LCUS-2, LCUS-4, LCUS-8 |
| USB Chip | CH340 |
| Relay Rating (AC) | 10A @ 250VAC |
| Relay Rating (DC) | 10A @ 30VDC |
| Interface | USB (Virtual COM Port) |
| Package Type | SMD |
| Application | Computer / Smart Home / Automation |
| Condition | New |
| Country of Origin | Made in Mainland China |
Perfect For
- Smart home automation and IoT projects
- Computer-controlled switching applications
- DIY electronics and maker projects
- Industrial and laboratory equipment control
- Raspberry Pi, Arduino, and microcontroller integrations
Learn more: OSHA on eye and face protection
Frequently Asked Questions
Q: What USB driver does the CH340 USB Relay Module require?
A: The module uses the CH340 USB-to-serial chip, which requires the CH340 driver. This driver is freely available and supports Windows, macOS, and Linux. Once installed, the module appears as a virtual COM port, allowing easy communication via serial commands.
Q: What is the difference between LCUS-1, LCUS-2, LCUS-4, and LCUS-8 models?
A: The numbers refer to the number of relay channels on the board. LCUS-1 has 1 channel, LCUS-2 has 2 channels, LCUS-4 has 4 channels, and LCUS-8 has 8 channels. All models share the same CH340 USB interface and 10A relay rating — simply choose the channel count that fits your project.
Q: Can this USB Relay Module switch AC mains voltage?
A: Yes. Each relay is rated at 10A at 250VAC, making it suitable for switching standard mains-voltage devices. Always follow local electrical codes and safety standards when working with mains voltage, and ensure proper enclosure and insulation when deploying in a finished project.
Q: Does the module need an external power supply?
A: The control circuit is powered directly by the USB connection, so no separate power supply is needed for the module itself. The relay contacts are independent and can switch external AC or DC loads within the rated limits.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.