4-Channel SPDT Relay HAT for Raspberry Pi

The 4-Channel SPDT Relay HAT for Raspberry Pi utilizes four high-quality SPDT (single pole - double throw) relays and provides NO/NC (Normally Open/ Normally Closed) interfaces that can control the load of high current.

This is a great solution for controlling devices that can't be directly controlled by the I2C bus. The standardized shield form factor enables smooth connection with a Raspberry Pi and it also has four LED indicators that show the on/off state of each relay.

• High-quality SPDT (single pole - double throw) relays
• Compatible with Raspberry Pi 1/2/3 and 4
• I2C interface with three hardware SW1 (1, 2, 3) to select the fixed I2C-bus address
• Relay screw terminals for easy connection
• Standardized shield shape and design
• LED working status indicators for each relay
• COM, NO (Normally Open), and NC (Normally Closed) relay pins for each relay

Specifications

• Power Supply: 4.75 ~ 5.5V
• Max Switching Voltage: 30VDC/ 250VAC
• Max Switching Current: 15A
• Frequency: 4Hz
• Dimensions: 91.2 x 56 x 32mm

• Relay HAT Schematics
• HLS8L Datasheet
• PCAL9535A Datasheet
• Python Test Code
• C# Test Code