SparkFun
Qwiic Relay - 1x1A DPDT
· MPN: COM-30416
Control higher-power loads from a microcontroller over I2C with this Qwiic relay board. It is built around the Omron G6K-2F-Y DC3 dual-pole/dual-throw relay,...
Control higher-power loads from a microcontroller over I2C with this Qwiic relay board. It is built around the Omron G6K-2F-Y DC3 dual-pole/dual-throw relay, letting a low-voltage logic system switch loads up to 1A at 30VDC or 0.3A at 125VAC at 40°C.
The board offers both software and hardware control options. You can drive the relay through the on-board TCA9555 GPIO expander over I2C, or trigger it from an external input such as a physical switch or standard I/O signal.
Two Qwiic connectors make it easy to add the relay to a Qwiic I2C daisy chain without soldering. The primary COM pole is available on a 3-pin screw terminal, while the secondary COM2 pole is broken out to standard 0.1-inch-spaced plated-through holes for soldered wiring or breadboard prototyping.
Features:
- I2C Drive: Controlled via the on-board TCA9555 GPIO expander, requiring a drive current of 5.8mA at 3.3V.
- External Drive: Can be triggered by an external input, such as a physical switch or a standard I/O signal up to 50mA.
- Solderless Qwiic Integration: Two on-board Qwiic connectors allow connection to an I2C daisy chain without soldering.
- Dual-Circuit Control: Switches two completely independent circuits simultaneously with a single command.
- Signal Optimized: Engineered for lower-power signal-level switching up to 1A at 30VDC.
- Advanced Drive: Allows external devices to drive the relay control directly without using I2C.
Specifications:
- Relay: G6K-2F-Y DC3 DPDT Relay
- Load Limits: 1A/30VDC and 0.3A/125VAC
- I2C Drive Current: 5.8mA
- External Drive Current: 50mA
- Relay Connections: COM Pole and COM2 Pole
- COM Pole: 3-Pin Screw Terminal
- COM2 Pole: 0.1"-spaced PTH
- I2C GPIO Expander: TCA9555RTWR I2C GPIO Expander
- I2C Address: 0x20 (Default), 0x21 (Alternate)
- Qwiic Connectors: 2x Qwiic Connectors
- LEDs: Red power (PWR) LED, green status (STAT) LED, and green relay activity (ACT) LED
- Red power LED: Red power (PWR) LED
- Green status LED: Green status (STAT) LED
- Green relay activity LED: Green relay activity (ACT) LED
Useful for maker and embedded projects that need isolated switching from a Qwiic-compatible controller, with support available through the SparkFun I2C Expander Arduino Library and related design files.
Jargon buster
Plain-language definitions for the technical terms used above.
- Daisy chain
- A wiring layout where devices are connected one after another in a line. It matters because long or awkward chains can make projects messy or less convenient, while a hub lets several devices branch out from one point.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- I2C address
- An I2C address is the number a device uses so a microcontroller can tell it apart from other devices on the same I2C bus. It matters because two devices with the same fixed address may conflict if used together.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- PTH
- Plated through-hole means the pin holes are metal-lined so solder connects the pad on both sides of the board. It is useful for connectors and headers that need a strong mechanical and electrical connection.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
Find this product in
Qwiic Relay 1x1A DPDT Schematic
Schematic · 231.9 KB · Click any page to view full size
G6K-2F-Y DC3 Relay Datasheet
Datasheet · 4.3 MB · Click any page to view full size
TCA9555 GPIO Expander Datasheet
Datasheet · 2.8 MB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 1.2 MB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
