Introduction
This user manual provides comprehensive instructions for the installation, setup, operation, and maintenance of your SONOFF TX T3 Black 3-Gang Smart Light Switch. Please read this manual carefully before installation and use to ensure proper functionality and safety.
Product Features
- Neutral Wire Required: This device requires a neutral wire for installation.
- 2.4 GHz Network Only: Supports only 2.4 GHz Wi-Fi networks; 5 GHz networks are not supported.
- Not a Dimmer Switch: This switch does not support dimming functionality.
- Smart Remote Control: Control your lights from anywhere using the eWeLink App (compatible with Android & iOS).
- Hands-Free Voice Control: Seamlessly integrates with Alexa, Google Home, and IFTTT for convenient voice commands.
- Timer & Schedule: Automate your lighting with customizable schedules and timers to fit your daily routine.
- Multiple Control Options: Operate the switch via RF remote control, direct touch on the glass panel, or through the eWeLink App.
- Family Sharing: Share control of the smart switch with family members for collective convenience.
What's in the Box
- SONOFF TX T3 Black 3-Gang Smart Light Switch
- Mounting Screws
- User Manual

Image: SONOFF TX T3 Black 3-Gang Smart Light Switch and its retail packaging.
Safety Information
Always ensure the power is turned off at the circuit breaker before performing any electrical work. If you are unsure about electrical wiring, consult a qualified electrician. This device is designed for indoor use only.
- Do not install with wet hands.
- Do not install in damp environments.
- Ensure correct wiring connections (Live, Neutral, Load).
- Verify that the neutral wire is present in your electrical box.
Installation
Before You Begin
Ensure the power to the relevant circuit is turned off at the main circuit breaker. Confirm that your wall box has a neutral wire available. The switch is designed to fit standard wall boxes. Refer to the dimensions below:

Image: Diagram illustrating the dimensions for compatibility with existing wall boxes.
Wiring Diagram
Connect the Live, Neutral, and Load wires according to the markings on the back of the switch. Ensure all connections are secure. For detailed wiring instructions, please refer to the diagram provided in the physical user manual or consult a qualified electrician.
Setup: App Pairing Instruction
Follow these steps to pair your SONOFF Smart Light Switch with the eWeLink App:
- Power On: After successful installation, turn on the power at the circuit breaker.
- Enter Pairing Mode: Long press any configuration button on the switch for approximately 5 seconds. The Wi-Fi LED indicator will change, cycling through two short flashes and one long flash, indicating it is in pairing mode.
- Open eWeLink App: Install and open the eWeLink Smart Home App on your mobile device.
- Add Device: Tap the "+" icon in the app and select "Quick Pairing".
- Connect to Wi-Fi: Enter your 2.4GHz Wi-Fi password and follow the on-screen instructions to connect the device.
- Device Discovered: The app will discover and add your Wi-Fi device. Once added, you can name it and assign it to a room.
Video: A demonstration of the app pairing process for the SONOFF TX Smart Light Switch.
Video: An overview of the SONOFF TX Series WiFi Wall Switches, including features and basic operation.
Operating Instructions
Manual Control
Simply touch the capacitive touch buttons on the glass panel to turn the connected lights on or off. The blue LED indicators will illuminate when the light is on.
App Control
Once paired with the eWeLink App, you can control your lights remotely from anywhere with an internet connection. Open the app, select your switch, and tap the channel buttons to toggle the lights.

Image: Control your home devices from anywhere using the eWeLink App.
Voice Control
Integrate your switch with Amazon Alexa or Google Home. Once linked, use voice commands such as "Alexa, turn on the light" or "Hey Google, turn off the living room lights."

Image: Enjoy hands-free control of your smart light switch with voice commands.
RF Remote Control
The switch supports RF433 remote control for additional convenience. Pair a compatible RF remote (sold separately) to control your lights without Wi-Fi or the app.

Image: The smart switch supports RF433 remote control for flexible operation.
Scheduling and Timers
Use the eWeLink App to set up schedules and timers for your lights. For example, you can set lights to turn on at sunset and off at a specific time, or create countdown timers.

Image: Set timers and schedules to automate your lighting.
Family Sharing
The eWeLink App allows you to share control of your smart switch with other family members. Each member can then control the lights from their own device.

Image: Share device control with your family for shared convenience.
Maintenance
The glass panel of the SONOFF TX T3 switch is designed for easy cleaning. Simply wipe the surface with a soft, damp cloth. Avoid using abrasive cleaners or harsh chemicals that could damage the finish.

Image: The toughened glass panel is easy to clean.
Troubleshooting
| Issue | Possible Cause / Solution |
|---|---|
| Device not pairing with app. | Ensure your Wi-Fi network is 2.4 GHz. Check if the device is in pairing mode (LED indicator cycling). Move closer to your Wi-Fi router. Restart the switch and try again. |
| Lights not responding to touch. | Ensure the face plate is securely clipped in place and perfectly flat against the switch plate. Check wiring connections. |
| Voice control not working. | Verify that the eWeLink skill/action is enabled in your Alexa/Google Home app and linked to your eWeLink account. Check internet connectivity. |
| Switch offline in app. | Check your Wi-Fi signal strength. Restart your Wi-Fi router. Ensure the switch has constant power. |
Specifications
| Specification | Detail |
|---|---|
| Product Dimensions | 4.72 x 2.91 x 1.5 inches |
| Item Model Number | T3US3C |
| Operation Mode | Automatically, Off, Smart Switch |
| Current Rating | 6 Amps |
| Operating Voltage | 120 Volts |
| Contact Type | Normally Closed |
| Connector Type | Crimp |
| Terminal | Screw |
| Circuit Type | 1-way |
| Actuator Type | Smart Touch |
Warranty and Support
For warranty information and technical support, please refer to the official SONOFF website or contact their customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
Online Resources:
- Visit the SONOFF Store on Amazon for more products and information.





