Smart wall switch Sonoff M5-3C-80 Wi‑Fi — 3‑gang, wall-mounted smart switch, model M5-3C-80

Sonoff M5-3C-80 is a Wi‑Fi smart wall switch designed for installation in a standard wall box or in the Sonoff M-80 frame-holder (holder sold separately). The M5-3C-80 provides three independent mechanical channels for controlling lights or other AC loads and supports local and remote control via the eWeLink app, voice assistants and LAN. It works on 2.4 GHz Wi‑Fi and is compatible with Sonoff ecosystem devices such as NSPanel, R5 scene controller and DW2-WiFi sensors.

Advantages

The smart wall switch offers three quick-response mechanical buttons with adjustable LED indicators for easy detection in darkness and ergonomic operation even when wearing gloves. It supports full Sonoff functionality — timers, scenes, device grouping, status sync and sharing — and can operate without cloud access when local LAN is configured. The compact modern design matches other Sonoff products and fits standard wall installations.

Suitable for

• Controlling multiple lights from a single wall location
• Integrating lighting into smart home scenes and schedules
• Replacements for standard 3-gang wall switches in homes or offices
• Two-way or multi-way control when used with Sonoff Scene Controller R5

Key specifications

• Model: M5-3C-80
• Gangs: 3 independent channels
• Voltage: 100–240V AC, 50/60Hz
• Max current: 6A total (2A per gang)
• Max power: 1320W total (440W per gang); LED load: 100W/220V or 60W/110V per gang
• Wi‑Fi: 2.4 GHz (IEEE 802.11 b/g/n)
• App: eWeLink (Android, iOS); voice assistants: Amazon Alexa, Google Assistant
• Housing: PC V0 (flame-retardant)
• Operating conditions: -10°C to 40°C, 5%–95% RH (non-condensing)
• Dimensions: 86 x 71 x 41.5 mm; Weight: 137 g; Colour: black
• Certifications: CE, UKCA, RoHS
• Warranty: 24 months

How to use

Install the Sonoff M5-3C-80 in place of an existing 3-gang wall switch or mount it into a compatible wall box or the Sonoff M-80 frame-holder. Connect the live and neutral wires and the individual output lines for each channel following local electrical codes and the product wiring diagram. Configure Wi‑Fi via the eWeLink app and add the switch to your Sonoff account. After setup, control each gang by pressing the mechanical buttons, via the eWeLink app, by voice through a linked assistant, or by scenes and schedules configured in the app.

Recommendations

For reliable operation, use on a stable 2.4 GHz Wi‑Fi network and avoid connecting loads exceeding the per-gang ratings. If multi-way control is required, pair with Sonoff Scene Controller R5 and follow wiring instructions to implement two-way or multi-way circuits. Ensure installation is performed by a qualified electrician according to local regulations.