Raspberry Pi Pinout

30A Relay HAT

The 30A Relay HAT is a dual SPDT power relay I/O board based on the Microchip MCP23008 I2C expander. Ideally suited to automation or industrial control, switching of household appliances, industrial machinery or automotive applications.


  • 2 opto-isolated SPDT power relays
  • 30A / 15A @ 250V AC (NO / NC)
  • Supports up to 6mm2 / 10 AWG cable
  • 2oz copper PCB ensures maximum current flow
  • Easy to use interactive web GUI
  • Based on the MCP23008 8-port GPIO expander
  • Jumper selectable I2C address & GPIO voltage (3.3V / 5V)
  • Can be used with 3.3V or 5V I2C host devices (eg, Arduino)
  • Built-in user programmable ID EEPROM

Easy Installer

Our easy installer takes care of the setup process automatically.

sudo wget https://git.plasmadan.com/install.sh
sudo sh install.sh

Alternatively, you can install manually. See our setup guide.


30A Relay HAT