🚪 SONOFF MINI-ZBD — Zigbee Dry Contact Smart Switch (NO/NC)

The smart way to control gates, garage doors, geysers and gear that needs a volt-free (dry contact) trigger. The MINI-ZBD is a Zigbee 3.0 dry-contact relay with both NO (normally open) and NC (normally closed) modes — it switches a circuit without supplying power to it, so you can automate existing equipment without rewiring. Runs on 110–240V AC or 12–48V DC, controls DC loads up to 8W directly, and drives high-power equipment via a contactor. Zigbee hub required. MPN: MINI-ZBD.

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Free Delivery

Orders over R2,500

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Local Stock

Ships from Gauteng

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Dry Contact

NO / NC · Volt-Free

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Zigbee 3.0

Hub Required

⚠️ Zigbee hub required. No WiFi — pair it to a SONOFF Zigbee gateway (ZB Bridge-P/U, NSPanel Pro, iHost) or a ZBDongle-E/P running ZHA / Zigbee2MQTT. This is a wired DIY device — if you're not confident working with gate/garage controllers or mains wiring, please use a qualified installer. Apple Home is supported via a Matter bridge (ZBBridge-U / iHost / eWeLink CUBE), not natively.

⚡ Key Features

Dry Contact (Volt-Free) Output — switches a circuit without sending power through it, so it works like a smart "finger" pressing the trigger terminals on your existing gate, garage or boiler controller
NO & NC Modes — supports both normally open and normally closed wiring, so it fits almost any controller or alarm/interlock setup
AC or DC Powered — accepts 110–240V AC or 12–48V DC input, so it drops straight into mains wiring or low-voltage solar / battery / RV systems with no extra converter
Direct DC Load Control — drives DC solenoid valves and motors up to 8W directly, with fast response and low resistance for better load protection
High-Power via Contactor — pair it with a contactor to switch heavy loads (geyser elements, aircon, large pumps, borehole) using a safe low-power signal — no need for an expensive high-wattage smart switch
Zigbee Router (Turbo Mode) — mains/DC powered, so it extends your Zigbee mesh, strengthens signal and reduces dead zones
Local Control & Automation — schedules, scenes and remote control via eWeLink, or full local control in Home Assistant (ZHA / Zigbee2MQTT)
Voice Control — works with Amazon Alexa and Google Assistant through your Zigbee hub

🏠 Perfect For

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Gates & Garage Doors

Wire it across the trigger terminals on your gate or garage motor and open/close from your phone or an automation — no proprietary remote needed.

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Geyser via Contactor

Drive a contactor to switch your geyser element on a schedule or around solar — control a heavy load safely with a low-power dry-contact signal.

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Irrigation & Boreholes

Control sprinkler valves, pumps and DC solenoids on tailored schedules to cut water use and keep the garden going.

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Solar / Battery / RV

The 12–48V DC input makes it ideal for low-voltage off-grid, caravan and boat automation without adding a power converter.

💡 What "dry contact" means: A normal smart switch supplies power to whatever it controls. A dry-contact switch just opens and closes a pair of terminals — exactly like pressing a button — without any voltage of its own. That's what lets it safely automate gate motors, garage controllers, boilers and alarm inputs that expect a simple trigger, not mains power.

★ Before you publish: confirm the exact dimensions and dry-contact contact rating from the retail box / SONOFF spec sheet and add them to the table below. Direct DC load is rated to 8W; anything heavier must go through a contactor.

📋 Technical Specifications

Product	SONOFF MINI Dry — Zigbee Dry Contact Smart Switch
MPN / Model	MINI-ZBD
Output Type	Dry contact (volt-free) relay — NO & NC
Power Input	110–240V AC · or · 12–48V DC
Direct DC Load	Up to 8W (motors, solenoid valves)
High-Power Loads	Via external contactor (aircon, geyser, large pumps)
Dry-Contact Rating	★ confirm on packaging
Protocol	Zigbee 3.0
Zigbee Router	Yes — Turbo Mode, extends mesh
Hub Required	Yes — ZB Bridge-P/U, NSPanel Pro, iHost, ZBDongle-E/P
Home Assistant	ZHA · Zigbee2MQTT (local control)
Apple Home	Via Matter bridge (ZBBridge-U / iHost / eWeLink CUBE)
Voice Control	Amazon Alexa · Google Assistant
App	eWeLink (iOS & Android)
Dimensions	★ confirm on packaging
Warranty	1 Year Manufacturer Warranty

❓ Frequently Asked Questions

What is a dry contact and why does it matter?

A dry contact is a volt-free switch — it just opens and closes two terminals like a push-button, without supplying any power. That's exactly what gate motors, garage controllers, boilers and alarm inputs expect, so the MINI-ZBD can automate them safely without changing the existing wiring.

Can it open my gate or garage door?

Usually yes — most gate and garage motors have trigger terminals designed for a momentary dry-contact pulse. Wire the MINI-ZBD across those terminals and you can operate the door from the app or an automation. Check your motor's manual for the trigger input.

Can it switch my geyser or aircon?

Not directly for heavy loads — but it's the perfect low-power controller. Use it to drive a contactor, and the contactor switches the high-current geyser element, aircon or large pump. Direct control is limited to DC loads up to 8W.

Do I need a hub?

Yes. It's Zigbee 3.0 with no WiFi — pair it to a SONOFF Zigbee gateway (ZB Bridge-P/U, NSPanel Pro, iHost) or a ZBDongle-E/P running ZHA / Zigbee2MQTT.

Can I power it from a 12V or 24V system?

Yes. It accepts 12–48V DC as well as 110–240V AC, so it's well suited to solar, battery, RV and boat setups without an extra converter.

Does it work with Home Assistant?

Yes — supported in ZHA and Zigbee2MQTT via a SONOFF Zigbee dongle for full local control and automation.