SONOFF MINI-D Dry-Contact Wi-Fi Smart Switch

The SONOFF MINI-D is a versatile and compact smart switch designed to bridge traditional dry-contact systems with modern smart home automation. Unlike typical smart relays that carry load voltage, this device offers dry-contact output (voltage-free switching) in both Normally Open (NO) and Normally Closed (NC) configurations, making it ideal for controlling systems like garage doors, boilers, access control circuits, or other devices that rely on signal inputs rather than direct power switching.

What sets the MINI-D apart is its flexibility in handling both AC and DC input power. You can power it from 100–240 V AC or from 12–48 V DC (choose one, not both simultaneously), which enables integration into diverse electrical environments. This means it can be embedded in both standard home wiring and specialized low-voltage setups.

To further extend its utility, the MINI-D supports control of low-power DC motors or solenoid devices up to ~8 W, making it suitable for small automation tasks like valve control, mini gates, or light loads. For higher-power systems, you can use it to drive a contactor — the MINI-D handles the low-power trigger side, and the contactor handles the heavy load safely.

The device is Matter-certified, which enables seamless interoperability with major smart ecosystems like Apple Home, Google Home, Alexa, and Home Assistant (provided a Matter-compatible bridge or controller is present). Using the companion app, you can set schedules, automate scenes, control remotely, or trigger actions based on other device states. Physical switch inputs (S1/S2) are also supported, so you can maintain manual control in parallel with smart commands.

Built for safe, reliable operation, the MINI-D includes protective features such as current limits, isolation of control circuitry from load wiring, and clear wiring guidance to prevent misconnection. Despite its powerful capabilities, it is small enough to fit into most standard junction boxes or behind wall-mounted panels, enabling a clean, integrated installation.

Overall, the SONOFF MINI-D is a powerful tool for users who need smart control over systems that require dry contacts, bridging legacy installations and modern automation without major rewiring or compromises.

Browse more options in our Smart Switches and Smart Devices collections.