SparkFun Qwiic Relay – 1x1A DPDT

Resources:

Schematic
KiCad Files
Board Dimensions
Datasheets:

G6K-2F-Y DC3 DPDT Relay
TCA9555 GPIO Expander

Hookup Guide
SparkFun I2C Expander Arduino Library
GitHub Repository

I2C Controlled Qwiic Relay Module With DPDT Switching For Safe High Voltage Load Control Using Microcontrollers
The SparkFun Qwiic Relay 1x1A DPDT module enables safe and reliable control of higher voltage and current loads directly from low voltage microcontroller systems. Built around the Omron G6K 2F Y DC3 dual pole dual throw relay, this board supports switching up to 1A at 30VDC or 0.3A at 125VAC at 40C. It is well suited for applications such as motor control, automation systems, industrial interfaces, and smart device switching where electrical isolation is essential.
Designed for flexibility and ease of integration, the module supports both I2C based control and external triggering. The onboard TCA9555 GPIO expander allows low current operation at just 5.8mA using a 3.3V logic interface. With dual Qwiic connectors, the board enables solderless plug and play integration into I2C based systems, making it ideal for rapid prototyping and scalable embedded designs.
Key Features

DPDT Relay Switching: Dual pole dual throw relay enables switching of two separate circuits simultaneously
High Voltage Handling: Supports up to 30VDC at 1A and 125VAC at 0.3A for load control
I2C Interface: Controlled via onboard TCA9555 GPIO expander for easy microcontroller communication
Low Drive Current: Requires only 5.8mA at 3.3V for efficient operation
External Trigger Support: Can be controlled using external signals up to 50mA
Qwiic Connectivity: Dual Qwiic connectors for solderless plug and play I2C integration
Electrical Isolation: Safely separates low voltage logic from high power circuits
Compact Form Factor: Suitable for embedded and space constrained designs