Take full control of your home or industrial automation projects with the SainSmart USB Eight Channel Relay Board, powered by eight SPDT relays (SRD-12VDC-SL-C). This 12V relay board offers a reliable and flexible solution for switching high-voltage devices from your PC or microcontroller.

✅ Fully Supported by Our Software – Seamless integration with our custom control software makes setup fast and intuitive. Easily automate devices using our interface or your own scripts.
✅ Enhanced PCB Design – Featuring extra PCB openings to improve voltage isolation, protecting both your equipment and your system.
✅ Reinforced High-Current Tracks – Doubled copper thickness on high-load paths ensures stable operation even under demanding electrical loads.
✅ Versatile SPDT Relays – Each relay supports both normally open (NO) and normally closed (NC) outputs, giving you full switching control for AC or DC applications.

Perfect For:

Home automation
Smart lighting control
Industrial automation
HVAC control
IoT projects
PC-based device control

Specs:

Relay Type: SPDT (Single Pole Double Throw)
Relay Model: SRD-12VDC-SL-C
Operating Voltage: 12V DC
Channels: 8
USB Interface: Plug & Play with PC (no external power needed for USB)
Dimensions: Compact and mountable board for easy integration

Upgrade your automation setup with the reliability and flexibility of the SainSmart 8-Channel USB Relay Board – trusted by makers, engineers, and automation pros worldwide.

USB Relay Controller

SainSmart USB Eight Channel Relay Board for Automation – 12 V