Sonoff MINI Dry Zigbee Review: Dry Contact Relay That Also Repeats the Mesh
The Sonoff MINI-ZBD is a single-channel Zigbee 3.0 dry contact module for garage doors, gates, boilers and small DC motors. It takes 100-240 V AC or 12-48 V DC, switches a potential-free NO/NC output rated 24 V 2 A resistive or 8 W on 12/24 V DC, and stays on the mesh as a router. Home Assistant reaches it through Zigbee2MQTT, and SONOFF lists Alexa, Google Home and SmartThings through a Zigbee hub. It is not Matter and not Apple Home. If the house is already on Zigbee, this is the dry-contact MINI; if the house is Matter-over-Wi-Fi, the MINI-D is the matching box.
- Zigbee households
- Garage door and gate automation
- Home Assistant / Zigbee2MQTT users
- Low-voltage DC valves and motors
Pros
- Potential-free NO/NC dry contact for garage doors, gates and boilers
- Runs on 100-240 V AC or 12-48 V DC
- Zigbee 3.0 router that extends the mesh
- Zigbee2MQTT support with OTA, inching and power-on behavior
- Works with Alexa, Google Home and SmartThings through a Zigbee hub
- Compact 41 x 43 x 21.5 mm module with a physical button
Cons
- Requires a Zigbee hub, with no Wi-Fi or Matter fallback
- No Apple Home support
- Dry-contact output only, not a mains lighting switch
- Safety protections and warranty are not listed on the spec sheet
Who is the MINI-ZBD for?
This module is for a circuit that wants a click, not a live voltage: garage door openers, gate controllers, boilers and solenoid valves that expect a dry contact. It is also for a Zigbee mesh that can use another always-on router. Power is flexible, 100-240 V AC with a neutral, or 12-48 V DC, so it can live in a regular junction box or on a low-voltage supply. It is not for switching mains lighting; the output is potential-free and the DC motor rating is 8 W.
What the MINI-ZBD offers
Hardware matches the Wi-Fi MINI-D: 41 x 43 x 21.5 mm, 34.5 g, a physical button, NO/COM/NC on top and N/L/S1/S2/DC+/DC- along the bottom. The radio is the difference. An EFR32MG21 runs Zigbee 3.0, Zigbee2MQTT exposes switch state, power-on behavior, detach-relay, inching, delayed power-on and turbo mode, and OTA is documented. SONOFF also publishes a SmartThings driver invite. Because it is mains-powered it repeats Zigbee traffic, which is the practical reason to pick it over a battery end device in a large mesh.
What to know before you buy
A Zigbee hub or coordinator is required. There is no Wi-Fi, Bluetooth, Thread, Z-Wave or Matter on this SKU; Matter over Wi-Fi is the MINI-D. Apple Home is not supported. The dry-contact output is not a mains switch: resistive load is 2 A at 24 V DC, not 10 A at 230 V. Safety protections are not listed on the help-center spec table. Warranty is not published there either.
Is the MINI-ZBD worth it?
For a Zigbee house that needs one dry-contact channel, yes: it is the same tiny MINI body as the Wi-Fi version, with a router radio and first-class Zigbee2MQTT support. For a Matter or Apple Home house, buy the MINI-D instead of hoping this one will grow a second radio.
Frequently asked questions
What is the difference between the Sonoff MINI-ZBD and the MINI-D?
Same dry-contact hardware. The MINI-ZBD is Zigbee 3.0 and acts as a mesh router. The MINI-D is Matter over Wi-Fi. Pick the radio the house already uses.
Does the MINI-ZBD work with Home Assistant?
Yes. Zigbee2MQTT documents model MINI-ZBD and exposes the switch, power-on behavior, detach-relay mode, inching, delayed power-on and turbo mode, plus OTA.
Does it need a hub?
Yes. It is a Zigbee 3.0 device. A Zigbee coordinator such as a SONOFF dongle, a Home Assistant radio, SmartThings or an Echo with a built-in Zigbee hub is required.
Can the MINI-ZBD switch a 230 V light?
Not from its own output. The relay is potential-free, rated 24 V 2 A resistive or 8 W on 12/24 V DC. High-power loads need an external contactor driven by that dry contact.
Does the MINI-ZBD support Apple Home or Matter?
No. Matter over Wi-Fi is the MINI-D. The MINI-ZBD is Zigbee only.


