--- product_id: 265639476 title: "SainSmart USB Eight Channel Relay Board for Automation - 12 V" brand: "sainsmart" price: "S$50" currency: SGD in_stock: true category: "Sainsmart" url: https://www.desertcart.sg/products/265639476-sainsmart-usb-eight-channel-relay-board-for-automation-12-v store_origin: SG region: Singapore --- # 10A high current switching 8 USB-controlled SPDT relays Enhanced voltage isolation PCB SainSmart USB Eight Channel Relay Board for Automation - 12 V **Brand:** sainsmart **Price:** S$50 **Availability:** ✅ In Stock ## Summary > ⚙️ Power your smart projects with precision and control! ## Quick Answers - **What is this?** SainSmart USB Eight Channel Relay Board for Automation - 12 V by sainsmart - **How much does it cost?** S$50 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/265639476-sainsmart-usb-eight-channel-relay-board-for-automation-12-v) ## Best For - sainsmart enthusiasts ## Why This Product - Trusted sainsmart brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Advanced PCB Design:** Extra openings and doubled high current tracks for superior voltage isolation and durability. - • **8-Channel USB Control:** Seamlessly automate multiple devices with a single USB port. - • **Compact & Reliable Build:** Premium FR4 two-layer PCB with metalized holes ensures long-lasting performance. - • **Robust 10A Switching Capacity:** Power up home lights, motors, and solenoids without compromise. - • **Universal Software Compatibility:** Plug-and-play with Windows and popular programming languages for effortless integration. ## Overview The SainSmart USB Eight Channel Relay Board is a 12V-powered automation powerhouse featuring 8 SPDT relays rated for 10A switching. Designed with enhanced PCB isolation and doubled high current tracks, it supports seamless USB control for home automation, robotics, and more. Compatible with universal Windows software and multiple programming environments, this compact, durable board is perfect for professionals seeking reliable, scalable device control. ## Description This is a USB controlled relay module with 8 relays SRD-12VDC-SL-C. You may use it for simple ON/OFF switching electrical devices - home lights, DC motors, solenoids, and others. It may help you building projects like robotics and home automation. Each such board requires one USB port. The more USB ports you have the more Relay boards you may connect. You may use it with our software( universal software for all our relay boards).Specification* Relay specification: 10A 250VAC/10A 125VAC/10A 30VDC /10A 28VDC * Power Supply: 12 VDC * Current consumption: 300 mA * Led for each relay output: Power Led / USB led * Size: 93mm / 70mm / 16mm * Windows software examples: VB6, BCB6, Java (netbeans), VB.NET 2010 Express, C++.NET 2010 Express * PCB parameters: FR4 / 1.5mm / two layers / metalized holes / HAL / white stamp / solder maskNote* When the board is connected to the PC while PC is restarted, the relays will be toggled several times which because of the structure of the FTDI chip. * The device must be supplied with 12 VDC or order to work. * There is no protection against reversed voltage! If the VCC(+12V) and GND are reversed the board will be damaged! * The board can not work without computers. * If you need our software, please contact our customer service via email.Instructionshttp://s3.desertcartaws.com/s3.image.smart/download/101-70-116/USB_8CH_12V.zip ## Features - 8 SPDT relays SRD-12VDC-SL-C - Supported by our software - Extra PCB openings for better voltage isolation - Doubled high current tracks ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0093Y89DE | | ASIN | B0093Y89DE | | Brand Name | sainsmart | | Coil Voltage | 12 Volts | | Connector Type | Solder | | Contact Current Rating | 10 Amps | | Contact Material | Copper | | Contact Type | spdt | | Current Rating | 10 Amps | | Customer Reviews | 4.1 4.1 out of 5 stars (113) | | Customer reviews | 4.1 4.1 out of 5 stars (113) | | Date First Available | 8 September 2013 | | Is Discontinued By Manufacturer | No | | Item model number | 8541582310 | | Manufacturer | SainSmart | | Manufacturer | SainSmart | | Maximum Switching Current | 10 Amps | | Maximum Switching Voltage | 12 Volts | | Minimum Switching Voltage | 11 Volts | | Model | 8541582310 | | Mounting Type | PCB Mount | | Operation Mode | Automatic | | Part Number | 11601 | | Product Dimensions | 12.19 x 9.4 x 3.2 cm; 118 g | | Unit Count | 8.0 Count | | Wattage | 120 watts | ## Product Details - **Connector type:** Solder - **Contact material:** Copper - **Contact type:** spdt - **Current rating:** 10 Amps - **Mounting type:** PCB Mount ## Images ![SainSmart USB Eight Channel Relay Board for Automation - 12 V - Image 1](https://m.media-amazon.com/images/I/6162rh6ZAGL.jpg) ## Questions & Answers **Q: The unit is functioning as expected. However, after it's use more, the unit cause computer to crash, when turning the on/Off a few time, the program hang up on the write command. The computer needed to reboot to recover. Any idea about this issue ? There are posts on the web that shows the similar issues. Do you have …** A: i know this question is old, but other people might be having the same problem. I had the same problem after so much iteration of write. what i did was clear the cache. the memory can only hold so much write before it hangs. I clear the cache before every write. it worked for me **Q: Do they provide a tool to control the board through command line?** A: You can download a sample tool from them which controls it via gui. I never saw a command line tool. It wasnt hard to integrate their commands into my own platform so a basic coder could probably make you a command line tool. **Q: Can this be used to give nc / no contacts?** A: I'm not sure of your question. This card has eight relays. Each relay has three screw clamp terminals where one is normally open, one is normally closed and the last is the common. So you can wire your device(s) to any or all relays in either normally open or closed position as you like. I hope this clarifies things. **Q: I want use as programmable sequential controller for my business led street sign, this unit need computer for program only or need computer to run.** A: You would need it connected to a computer. This unit does not have any sort of programmable timers or states. It is more or less a light switch you control via a computer button. ## Frequently Bought Together - SainSmart USB Eight Channel Relay Board for Automation - 12 V - MILAPEAK 8pcs (4 Sets) 8 Positions Dual Row 600V 25A Screw Terminal Strip Blocks with Cover + 400V 25A 8 Positions Pre-Insulated Terminals Barrier Strip (Black & Red) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/265639476-sainsmart-usb-eight-channel-relay-board-for-automation-12-v](https://www.desertcart.sg/products/265639476-sainsmart-usb-eight-channel-relay-board-for-automation-12-v) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-10-26*