{"product_id":"usb-relay-module-ch340-intelligent-control-switch-lcus","title":"USB Relay Module CH340 Smart Switch LCUS-1\/2\/4\/8 Channel","description":"\n\u003ch2\u003eUSB Relay Module CH340 – Intelligent USB Control Switch for Smart Home \u0026amp; Automation\u003c\/h2\u003e\n\u003cp\u003eTake control of your electrical devices with this versatile \u003cstrong\u003eUSB Relay Module\u003c\/strong\u003e 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.\u003c\/p\u003e\n\n\u003cp\u003eWhether 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.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCH340 USB Chip:\u003c\/strong\u003e Plug-and-play USB connectivity with wide driver support across Windows, Linux, and macOS.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple Channel Options:\u003c\/strong\u003e Choose from 1, 2, 4, or 8 relay channels (LCUS-1 \/ LCUS-2 \/ LCUS-4 \/ LCUS-8) to match your project needs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Load Capacity:\u003c\/strong\u003e Each relay rated at \u003cstrong\u003e10A @ 250VAC\u003c\/strong\u003e and \u003cstrong\u003e10A @ 30VDC\u003c\/strong\u003e — handles most household and industrial loads.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOver-Current Protection:\u003c\/strong\u003e Built-in over-current safeguard for reliable, long-term operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUSB-Powered:\u003c\/strong\u003e Draws power directly from the USB port — no external supply required for the control circuit.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmart Home Ready:\u003c\/strong\u003e Ideal for home automation, remote switching, and DIY electronics projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact SMD Package:\u003c\/strong\u003e Space-saving surface-mount design for easy integration into enclosures and project builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomizable:\u003c\/strong\u003e Supports custom configurations to suit specialized applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModels Available\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLCUS-1, LCUS-2, LCUS-4, LCUS-8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUSB Chip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCH340\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Rating (AC)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10A @ 250VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Rating (DC)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10A @ 30VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInterface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUSB (Virtual COM Port)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSMD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eComputer \/ Smart Home \/ Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSmart home automation and IoT projects\u003c\/li\u003e\n  \u003cli\u003eComputer-controlled switching applications\u003c\/li\u003e\n  \u003cli\u003eDIY electronics and maker projects\u003c\/li\u003e\n  \u003cli\u003eIndustrial and laboratory equipment control\u003c\/li\u003e\n  \u003cli\u003eRaspberry Pi, Arduino, and microcontroller integrations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What USB driver does the CH340 USB Relay Module require?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the difference between LCUS-1, LCUS-2, LCUS-4, and LCUS-8 models?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this USB Relay Module switch AC mains voltage?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the module need an external power supply?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo 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.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What USB driver does the CH340 USB Relay Module require?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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. 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