Relay 4 Zero - 4-Channel Relay Board for Pi Zero

The Relay 4 Zero is a 4-channel relay board in the pHAT form factor, designed to control low and medium voltage devices with your Raspberry Pi Zero or any 40-pin Raspberry Pi. It provides a safe way to switch devices that cannot be directly controlled by the Pi's GPIO pins.

Each relay can handle loads up to 2A at 120V AC or 24V DC, making it suitable for controlling lights, fans, motors, and other household or workshop devices. The 3V relay coils allow triggering at low voltage levels directly from the Pi's GPIO.

Key Features

• Four 3V Relays – Each rated for 2A/24V DC or 2A/120V AC loads
• pHAT Form Factor – Compact design fits perfectly on Pi Zero
• 40-Pin Stacking Header – Stack additional HATs on top
• Status LEDs – Visual indication of each relay's state
• Configurable GPIO – Default pins 31, 33, 35, 37 can be remapped via headers
• Mounting Holes – Secure installation in enclosures

Specifications

• Relay Channels: 4
• Relay Voltage: 3V (coil)
• AC Load Rating: 120V @ 2A
• DC Load Rating: 24V @ 2A
• Default GPIO Pins: 31, 33, 35, 37
• Dimensions: 65 × 30 × 20mm (approx.)
• Weight: 100g (approx.)

Compatibility

• Raspberry Pi Zero / Zero W / Zero 2 W
• All 40-pin Raspberry Pi models (Pi 3, Pi 4, Pi 5)

Ideal For

• Home automation projects
• Controlling lights, fans, and motors
• IoT switching applications
• Garage door and gate controllers

Package Contents

• 1× Relay 4 Zero board