Raspberry Pi 8-ch Relay Expansion Board

Control high-voltage devices from your Raspberry Pi with this 8-channel relay expansion board. Perfect for home automation, industrial control, and switching AC or DC loads up to 5A 250V AC or 5A 30V DC.

The board features photo-coupling isolation to protect your Pi from high-voltage interference, status LEDs for each relay, and a standard rail-mount case for professional installations.

Key Features

• 8 Relay Channels – Control multiple devices independently
• High-Capacity Relays – 5A 250V AC or 5A 30V DC per channel
• Photo-Coupling Isolation – Protects Pi from high-voltage interference
• Status LEDs – Visual indication of relay states
• Configurable Pins – Jumper selection for custom GPIO mapping
• Rail Mount Case – Standard DIN rail mounting for enclosures
• External Control – Reserved interface for PLC integration

Specifications

• Power Supply: 5V
• Trigger Signal: 3.3V/5V
• Relay Channels: 8
• Contact Form: SPDT (NO, NC)
• Closed Current: 6mA per channel
• Connector: Screw terminal block
• Dimensions: 232 × 72mm
• Mounting Holes: 3.0mm

Compatibility

• Raspberry Pi (40-pin GPIO models)
• Jetson Nano

Ideal For

• Home automation systems
• Industrial control applications
• Lighting and appliance control
• Scheduled switching (cron jobs)

Resources

• Waveshare Wiki – Examples for wiringPi, bcm2835, Python, and web control