The Qwiic DPDT Relay lets you switch two circuits via I2C or external input, with simple wiring and Qwiic connectors for easy integration. Easily control high-power devices directly from your microcontroller via I2C with the SparkFun Qwiic Relay. Built around the Omron G6K-2F-Y DC3 dual-pole/dual-throw (DPDT) relay, this board allows you to safely switch loads up to 1A at 30VDC or 0.3A at 125VAC (at 40°C). This relay is perfect if you're controlling heavy-duty motors or managing other high-power devices, bridging the gap between low-voltage logic and high-power applications. Flexible Control Options We designed this board to adapt to your specific project needs, offering multiple ways to trigger the relay: * I2C Drive: Controlled via the on-board TCA9555 GPIO expander, requiring a remarkably low drive current of just 5.8mA at 3.3V. * External Drive: This relay can also be triggered by an external input, such as a physical switch or a standard I/O signal (up to 50mA), giving you hardware-level control. * Solderless Qwiic Integration: Two on-board Qwiic connectors let you add the relay to your I2C daisy chain without ever touching a soldering iron. Transitioning from a Single Relay If you are upgrading from our original Qwiic Single Relay, this DPDT version introduces a few key architectural differences that have been tailored for precision control: * Dual-Circuit Control: While the original relay used a single-pole (SPDT) design, this DPDT board can switch two completely independent circuits simultaneously with a single command. * Signal Optimized: The original relay was primarily built for heavy, high-voltage AC loads up to 5.5A at 240VAC. This new DPDT version is specifically engineered for lower-power signal-level switching up to 1A at 30VDC. * Advanced Drive: Don't want to use I2C? This board allows external devices to drive the relay control directly. Wiring your high-power components is as straightforward as it gets with the Qwiic Relay. We included a 3-pin screw terminal for a quick, completely solderless connection to the relay's primary pole (COM Pole). Meanwhile, the secondary pole (COM2 Pole) is broken out to standard 0.1-inch-spaced plated-through holes (PTH), giving you the flexibility to solder wires directly or use a breadboard for prototyping. Features * 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: 3-Pin Screw Terminal * COM2 Pole: 0.1"-spaced PTH * TCA9555RTWR I2C GPIO Expander * I2C Address: 0x20 (Default), 0x21 (Alternate) * 2x Qwiic Connectors * LEDs * Red power (PWR) LED * Green status (STAT) LED * Green relay activity (ACT) LED 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