SONOFF RE5V1C – 5V Wi-Fi Inching / Self-locking Relay Module

The SONOFF RE5V1C is a compact, low-voltage smart relay module engineered for precise control in IoT and automation projects. Powered by 5 V DC, this module is tailored for environments where a safe, low-voltage interface is essential—such as gate controls, garage doors, or other systems using signal-level switching. Its dry-contact relay output ensures voltage-free operation, making it compatible with a wide range of circuits regardless of their power domain.

One of its distinguishing capabilities is its dual mode design: inching (momentary) and self-locking modes. In inching mode, a pulse of activation toggles the relay briefly before returning it to its previous state—a perfect behavior for triggers or momentary switches. In self-locking mode, you can control it like a standard switch, toggling the relay on or off as needed. You can switch between these modes through software, giving flexible behavior for different use cases.

Because it’s WiFi-enabled and compatible with the eWeLink app ecosystem, the RE5V1C supports remote control, scheduling, timers, and automation. It also supports LAN control, meaning it can be managed locally (on your local network) even if your internet connection drops. The module shares status updates in real time, ensuring your app or control system always knows whether the relay is active or idle.

Despite its powerful functionality, the RE5V1C remains compact and lightweight. Its “nano size” design allows integration into tight enclosures. Though its connection terminals require soldering rather than screw-in terminals, the small form factor and robust relay behavior make it a perfect choice for embedded smart control designs. Whether you’re enhancing a gate opener, automating a door lock, or designing a custom smart control panel, the SONOFF RE5V1C delivers intelligent switching with flexible modes, safe control, and smart integrations.

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