An 8-channel 12V relay module with USB-A interface for computer-based control. Uses the ULN2803 relay driver chip and genuine Songle relays for stable operation. Each relay is rated for 10A switching.

Features both a power socket and screw terminals for flexible power input. Once powered externally, the relays maintain their state even if the USB cable is disconnected or the computer is turned off.

Key Features

• 8-Channel Relay – 10A switching capacity per channel
• USB-A Interface – Computer control via USB
• ULN2803 Driver – Dedicated relay driver chip for stable operation
• Songle Relays – Reliable, genuine relay components
• Dual Power Input – Power socket and screw terminals
• State Retention – Relays hold state when USB is disconnected

Specifications

• Channels – 8
• Relay Rating – 10A
• Operating Voltage – 12V
• Interface – USB-A
• PCB Size – 96.8 × 72.2mm
• Mounting Holes – 3mm diameter, 92.7 × 68mm spacing