SONOFF MINI-ZB2GS MINI DUO - Zigbee 3.0 Dual Channel Smart Switch 16A

SONOFF MINI-ZB2GS MINI DUO - Zigbee 3.0 16A Double Channel Smart Switch

GENERAL PRESENTATION

The MINI DUO Zigbee (MINI-ZB2GS) is an ultra-compact double channel smart switch from the MINI Extreme series by SONOFF. With the same dimensions as the MINI-2GS (45×39.4×16.8mm weighing 36.2g), this micro-module stands out with its Zigbee 3.0 protocol instead of Matter Wi-Fi, offering a proven alternative for home automation installations requiring very low latency and excellent reliability.

Based on the Silicon Labs EFR32MG21 microcontroller, this switch offers universal compatibility with all home automation ecosystems supporting Zigbee 3.0: Home Assistant (via ZHA or Zigbee2MQTT), Homey Pro, Jeedom, Domoticz, openHAB, and any certified Zigbee gateway. This protocol maturity ensures perfect integration into your existing setup.

The MINI-ZB2GS manages two independent switching channels with a capacity of 10A per channel and a total maximum load of 16A. Each channel can be controlled separately via the eWeLink app (with SONOFF Zigbee gateway), through complex home automation, or locally via external switches (toggle or push button).

The major advantage of this model: the integrated Zigbee repeater function. Once permanently powered, the MINI-ZB2GS automatically extends the range of your Zigbee mesh network, improving communication quality for all Zigbee devices in your installation. This feature makes it an ideal choice to enhance the robustness of an existing Zigbee network while adding smart switching.

Important point: like the MINI-2GS, this model requires a neutral wire to function. Installation must be carried out by a qualified electrician and protected upstream by a circuit breaker or RCBO of a maximum of 16A.

KEY FEATURES

• Proven universal Zigbee 3.0 compatibility: The Zigbee 3.0 (IEEE 802.15.4) protocol ensures seamless integration with Home Assistant via ZHA (native integration) or Zigbee2MQTT (maximum flexibility with MQTT). Also compatible with Homey Pro, Jeedom (Zigbee plugin), Domoticz, openHAB, and all certified Zigbee gateways. Unlike the still-new Matter, Zigbee benefits from over 15 years of maturity and a vast compatible device library.
• Automatic Zigbee repeater function for a robust mesh network: Once installed and permanently powered, the MINI-ZB2GS automatically acts as a Zigbee router/repeater, extending the mesh network range for all your Zigbee devices (sensors, switches, bulbs). Each installed module enhances the overall stability of your Zigbee infrastructure by multiplying possible communication paths. Ideal for large homes or complex installations requiring extended coverage.
• High-capacity independent double channel: The two outputs each switch up to 10A (2400W at 240V), with a cumulative maximum of 16A to ensure installation safety. Control two distinct lighting zones, two different devices, or a lighting + fan combination. Each channel remembers its last state after a power outage to automatically restore its configuration. States reported in real-time to the Zigbee coordinator with typical latency.
• Preserved local control via existing switches: The S1 and S2 inputs accept both traditional toggle switches and modern push buttons. The switch type change is easily done with a triple press on the configuration button (LED blinks 3×). This flexibility allows you to maintain the aesthetics and ergonomics of your existing wall switches while adding Zigbee intelligence without any cloud or internet dependency.
• Ultra-compact professional installation: With its 45×39.4×16.8mm and only 36.2g, the MINI-ZB2GS fits into absolutely all standard European flush-mounted boxes, even the oldest or shallowest ones. The 16-14AWG automatic terminals directly accept rigid or flexible copper conductors without requiring additional connectors. Perfect for renovating existing installations without modifying wall wiring.
• Advanced Zigbee automation and minimal latency: Create complex automations in Home Assistant combining your two channels with any Zigbee device: motion detectors, temperature sensors, bulbs, motorized blinds. Use Node-RED for advanced visual flows or community blueprints for ready-to-use automations. Local Zigbee communication ensures quick response time.
• Zigbee groups and scenes for synchronized control: Use native Zigbee groups to simultaneously control multiple MINI-ZB2GS and other Zigbee devices with a single command. Create scenes storing the state of dozens of devices and recall them instantly. These native Zigbee features operate at the mesh network level without going through the coordinator, guaranteeing exceptional responsiveness.

TECHNICAL SPECIFICATIONS

Product Identification

• Trade name: MINI DUO (Zigbee)
• Model reference: MINI-ZB2GS
• Product series: MINI Extreme series
• Product type: 2-Gang Zigbee Smart Switch
• Manufacturer: Shenzhen Sonoff Technologies Co., Ltd.

Protocols and Connectivity

• Main protocol: Zigbee IEEE 802.15.4 (Zigbee 3.0)
• Secondary protocol: Bluetooth Low Energy (BLE) - Commissioning only
• Radio frequencies (EU):
  • Zigbee: 2405–2480 MHz (channels 11-26)
  • BLE: 2402–2480 MHz
• Maximum transmission power (EU):
  • Zigbee: ≤10 dBm
  • BLE: ≤10 dBm
• Typical Zigbee range:
  • Indoor: 10-20 meters (depending on obstacles)
  • Open field: Up to 100 meters
• Repeater function: Yes (automatic, integrated Zigbee router)
• Role in Zigbee network: Router (router/repeater)
• Continuous power required: Yes (necessary for repeater function)

Hardware and Microcontroller

• Microcontroller (MCU): EFR32MG21 (Silicon Labs)
• Architecture: ARM Cortex-M33 32-bit
• CPU frequency: 80 MHz
• Flash memory: 1024 KB
• RAM memory: 96 KB
• Integrated radio: 2.4 GHz IEEE 802.15.4

Electrical Characteristics

• Power supply voltage: 110–240V~ 50/60Hz single-phase only
• Load per channel:
  • Maximum per channel: 10A (2400W at 240V~)
  • Total cumulative maximum: 16A (3840W at 240V~)
  • Load type: Resistive only (lighting, electric heating)
• Mandatory upstream protection: Circuit breaker (MCB) or RCBO 16A
• Neutral wire: REQUIRED (installation impossible without neutral)
• Conductor type: 16-14 AWG (1.5-2.5 mm²) SOL/STR copper only
• Connection terminals: Spring-loaded automatic terminals
• Standby consumption:

Wiring Diagram

• Available terminals:
  • L: Phase input 110-240V~
  • N: Neutral input (MANDATORY)
  • L1: Phase output channel 1 (110-240V~)
  • L2: Phase output channel 2 (110-240V~)
  • S1: External switch input channel 1
  • S2: External switch input channel 2
• Compatible external switches:
  • Rocker switch - factory default
  • Push button
• Switch type change: Triple press button → LED blinks 3× → Type modified
• CRITICAL WARNING: NEVER connect S1 or S2 to neutral or ground → Guaranteed device damage

User Interface

• Physical buttons: 2 touch buttons on top of the device
• LED indicator: Multifunction blue LED
  • Slow blinking: Active Zigbee pairing mode
  • Off: Normal connection with gateway
  • Fast blinking: Abnormal connection, pairing failure/timeout
  • 3 quick blinks: External switch type change
  • 5 quick blinks: Factory reset triggered
• Main button functions:
  • Long press 5 seconds: Activate Zigbee pairing mode (duration: 3 minutes)
  • Triple quick press: External switch type change
  • Long press 10 seconds: Complete factory reset

Dimensions and Weight

• Device dimensions: 45 × 39.4 × 16.8 mm (L × W × H)
• Net weight: 36.2 g
• Format: Ultra-compact rectangular
• Thickness: 16.8 mm (among the most compact on the market)

Construction and Materials

• Case material: Flame-retardant PC (Polycarbonate)
• Color: White
• Finish: Matte
• Protection rating: Indoor use only (no IP)
• Fire resistance: V0 compliant

Environmental Conditions

• Usage location: Indoor only
• Operating temperature: -10°C to +40°C
• Storage temperature: -20°C to +70°C
• Relative humidity: 5 to 95% RH (non-condensing)
• Maximum altitude: 2000 meters

Certifications and Compliance

• European certifications: CE
• North American certifications: FCC
• Environmental compliance: RoHS
• FCC ID: 2APN5-MINIZB2GS
• RED Directive: 2014/53/EU
• Zigbee certification: Zigbee 3.0 certified (Connectivity Standards Alliance)
• WEEE compliance: Yes (mandatory recycling)

Zigbee Gateway Compatibility

• Recommended SONOFF Zigbee Gateways:
  • ZBBridge-P (Zigbee 3.0 + Wi-Fi router, EFR32MG21 chipset)
  • ZBBridge-U (Zigbee 3.0 USB with backup battery)
  • NSPanel Pro (Touch screen + integrated Zigbee gateway)
  • iHost (Local home automation server with Zigbee)
• Compatible SONOFF Zigbee Dongles:
  • ZBDongle-P (USB Zigbee 3.0, TI CC2652P chipset)
  • ZBDongle-E (USB Zigbee 3.0, Silicon Labs EFR32MG21 chipset)
• Compatible open-source platforms:
  • Home Assistant:
    • Via ZHA (Zigbee Home Automation) - Native integration
    • Via Zigbee2MQTT - Maximum flexibility with MQTT broker
  • Homey Pro (native Zigbee support with integrated router)
  • Jeedom (via Zigbee plugin or Zigbee2MQTT)
  • Domoticz (via Zigbee2MQTT)
  • openHAB (Zigbee binding)
  • Hubitat Elevation
• Other Zigbee 3.0 Gateways: Compatible with any standard certified Zigbee 3.0 gateway (Philips Hue Bridge, IKEA Dirigera, Amazon Echo 4th gen+, etc.)

Supported Zigbee Functions

• Device Type: On/Off Output (Relay)
• Supported Zigbee Clusters:
  • On/Off (0x0006) - On/Off state of both channels
  • Groups (0x0004) - Membership in Zigbee groups
  • Scenes (0x0005) - Scene storage and recall
  • Basic (0x0000) - Device information
  • Identify (0x0003) - Visual identification
• Endpoints: 2 (one per switching channel)
• Binding support: Yes (direct link with other Zigbee devices)
• Reporting: Automatic state change reporting to the coordinator

Smart Features

• Remote control: Via eWeLink app (with SONOFF gateway) or home automation platform
• Voice control: Via home automation integrations (Alexa, Google Assistant, Siri via Home Assistant)
• Scheduling: Timetables via gateway or home automation platform
• Smart scenes: Creation of native multi-device Zigbee scenes
• Zigbee groups: Logical grouping of multiple devices (broadcast command)
• State memory: Channel states remembered after power outage
• Power-on state: Configurable (last state/always ON/always OFF)
• Zigbee binding: Direct link with Zigbee switches/buttons for local control without coordinator

Installation and Mounting

• Installation type: Embedded in standard wall box
• Compatible boxes: All standard European flush-mounted boxes (≥40mm depth)
• Required space: Minimum 40mm × 40mm × 40mm
• Attachment: Screws or clips depending on the box
• Required wiring: Phase + Neutral + 2× outputs + 2× external switches
• Necessary tools: Flat/Phillips screwdriver, voltage tester, wire stripper
• Installer qualification: Qualified electrician recommended

Control Application

• Application: eWeLink (iOS and Android)
• Download: App Store (Apple) or Google Play Store (Android)
• Store search: "eWeLink"
• Prerequisites: SONOFF Zigbee gateway configured in eWeLink
• Pairing: Scan QR code on the device or manual addition
• Pairing mode duration: 3 minutes

Package Contents

• 1× SONOFF MINI-ZB2GS MINI DUO (main device)
• 1× Multilingual quick start guide with QR code
• 1× User manual (EN/FR/DE/IT/ES)