1. Einleitung
This manual provides detailed instructions for the installation, operation, and maintenance of your SONOFF M5-3C-120 Switchman Smart Wall Switch. Please read this manual carefully before use to ensure proper functionality and safety.

2. Sicherheitshinweise
For your safety, always observe the following precautions:
- Turn off power at the circuit breaker before installation or maintenance.
- Die Installation sollte von einem qualifizierten Elektriker durchgeführt werden.
- Stellen Sie sicher, dass das Gerät innerhalb der angegebenen Lautstärke verwendet wird.tage und Stromstärken.
- This device is FCC certified, ensuring reliable and safe operation.
- Setzen Sie das Gerät keiner Feuchtigkeit oder extremen Temperaturen aus.
3. Packungsinhalt
Überprüfen Sie, ob alle Artikel in Ihrem Paket vorhanden sind:
- Smart wall switch x 1
- Schrauben x 2
- Kurzanleitung x 1
4. Spezifikationen
| Besonderheit | Detail |
|---|---|
| Modell | M5-3C-120 |
| Technische Daten | 4.72 x 2.91 x 1.63 Zoll; 15.87 Unzen |
| Betriebsmodus | EIN-AUS |
| Aktuelle Bewertung | 6 Amps |
| Betriebslautstärketage | 240 Volt |
| Kontakttyp | Normalerweise geschlossen |
| Steckertyp | Clamp |
| Terminal | Schrauben |
| Schaltungsart | 1-Wege |
| Antriebstyp | Druckknopf |
| Hersteller | SONOFF |

5. Einrichtung
5.1 Vor der Installation
Ensure the main power supply to the circuit is turned off at the circuit breaker before attempting any wiring. A neutral wire is required for this smart light switch.
5.2 Schaltplan
Connect the live wire (L) and neutral wire (N) to the corresponding terminals on the switch. Connect the load wire (L1, L2, L3 for 3-gang) to the respective output terminals. Always follow local electrical codes.
5.3 App-Installation
To control your smart switch remotely, download the eWeLink app:
- Suchen nach "eWeLink" on the Google Play Store.
- Suchen nach "eWeLink" on the Apple App Store.

5.4 Gerätekopplung
Follow these steps to pair your SONOFF M5-3C-120 with the eWeLink app:
- Long press any random button on the M5-3C-120 for 5 seconds until the Wi-Fi LED indicator changes in a cycle of two short and one long flash. Release the button.
- Öffnen Sie die eWeLink-App auf Ihrem Smartphone.
- Tap the "+" icon and select "Bluetooth Pairing".
- The app will scan for nearby devices. Select your M5-3C-120 from the list.
- Geben Sie Ihre WLAN-Zugangsdaten ein, wenn Sie dazu aufgefordert werden.
- Wait for the device to connect. Once successfully paired, you can control the switch via the app.
For a visual guide on the pairing process, please refer to the official video below:
6. Bedienungsanleitung
6.1 Grundlegende Bedienung
The SONOFF M5-3C-120 features quick-responsive physical buttons for direct control of your lights. Simply press a button to toggle the connected light on or off. The buttons are designed to be easily used by anyone, even with gloves on.


6.2 App-Steuerung
Once paired, the eWeLink app provides comprehensive control over your smart switch:
- Fernbedienung: Mit der eWeLink-App können Sie Geräte von überall aus ein- und ausschalten.
- Terminplanung & Timer: Set schedules to automatically turn lights on or off at specific times, such as turning on lights at dusk.
- Sprachsteuerung: Compatible with Alexa and Google Home, allowing hands-free control using simple voice commands.
- Intelligente Szene: Create smart scenes to automate actions, such as turning on lights automatically when a door sensor (like DW2-WiFi) detects an open door.
- eWeLink-Remote Gateway Function: The M5-3C-120 can be paired with the SONOFF R5 remote controller for dual control, offering enhanced flexibility.
- LED-Licht einstellen: The brightness of the button's LED indicator can be adjusted via the app, especially useful for locating the switch in the dark or for undisturbed sleep.





6.3 Zwei-Wege-Steuerung
With a Scene Controller like the SONOFF R5, you can achieve two-way or multi-way control of the same light from different positions, eliminating the need for complex traditional wiring.
Refer to the official video in Section 5.4 for a demonstration of two-way control.
7. Wartung
To ensure the longevity and optimal performance of your SONOFF M5-3C-120 Switch:
- Reinigen Sie die Oberfläche mit einem weichen, trockenen Tuch. Verwenden Sie keine Scheuermittel oder Lösungsmittel.
- Avoid exposing the device to direct sunlight or excessive heat.
- Stellen Sie sicher, dass das Gerät in einem gut belüfteten Bereich installiert wird.
8. Fehlerbehebung
If you encounter issues with your SONOFF M5-3C-120 Switch, consider the following:
- Device Offline/Disconnection: If the device frequently disconnects or goes offline, ensure your Wi-Fi router is stable and within range. Power outages or router reboots can sometimes cause temporary disconnections, requiring re-pairing or checking network settings.
- Kopplungsprobleme: If pairing fails, ensure the switch is in pairing mode (LED indicator flashing as described in Section 5.4). Keep your smartphone close to the device during pairing. Verify your Wi-Fi password is correct and that you are connected to a 2.4GHz Wi-Fi network.
- Keine Antwort: Check if the power supply to the switch is active. Ensure wiring is correct according to the diagram.
- Verhalten der LED-Anzeige: If the LED indicator is not behaving as expected, refer to the eWeLink app settings to adjust its brightness or check its status.
9. Garantieinformationen
Specific warranty details for the SONOFF M5-3C-120 Switchman Smart Wall Switch are typically provided with your purchase documentation or on the manufacturer's official webBitte informieren Sie sich auf der Website über die vollständigen Garantiebedingungen.
10. Kundendienst
For further assistance or inquiries regarding your SONOFF M5-3C-120 Switch, please contact SONOFF customer support:
- Hersteller: SONOFF
- E-Mail: support@itead.cc
- WebWebsite: sonoff.tech





