Shelly 1 Gen3 Smart Relay Module

Designed to fit into a standard 37 × 42 × 16 mm wall box, the Shelly 1 Gen3 smart relay module supports up to 16A at 240V AC to remotely control lights, heaters, irrigation systems, doorbells, or household appliances. Equipped with the ESP-Shelly-C38F chip with 8 MB flash, it operates without a hub, via direct Wi-Fi, and integrates with the Shelly Smart Control app, Alexa, Home Assistant, and all MQTT-compatible platforms.

Scripts, webhooks, MQTT, and KNX for limitless local automation

What makes the Shelly 1 Gen3 smart relay module superior to a simple connected relay is the breadth of its embedded protocols: MQTT, WebSocket, HTTPS, UDP, TLS with custom certificates, webhooks with 20 actions and 5 URLs per trigger, and KNXnet/IP communication for professional installations. Up to 20 configurable schedules and an integrated scripting engine allow for the creation of complex automations that run locally, without relying on a cloud. Its Wi-Fi repeater function and Bluetooth 4.2 gateway with BLE also extend the network coverage of the installation without additional hardware.

The Shelly 1 Gen3 smart relay module adapts to all electrical installations

With its potential-free dry contacts and multi-voltage compatibility (110-240V AC, 24-48V DC, or 12V DC), the Shelly 1 Gen3 smart relay module adapts to a wide variety of installations: contactor control, low-voltage heating control, motorization control, or integration into existing electrical panels. It supports up to 16A at 240V AC and 10A at 30V DC, covering almost all common domestic and tertiary uses. Its internal temperature sensor continuously monitors relay heating for reliable long-term use, from -20°C to 40°C.

FAQ

What is the difference between Shelly 1 Gen3 and Shelly 1 Mini Gen3?

The Shelly 1 Gen3 supports up to 16A at 240V AC compared to 8A for the Mini Gen3, and has a slightly larger casing (37 × 42 × 16 mm vs 29 × 34 × 16 mm). It also accepts multiple supply voltages (AC and DC), making it more versatile for various installations.

Does the Shelly 1 Gen3 require a hub to function?

No, it connects directly via 2.4 GHz Wi-Fi without a hub or gateway. It can be controlled from the Shelly Smart Control app or via Home Assistant, Alexa, and any MQTT or webhooks-compatible platform integrations.

Do automations work without an internet connection?

Yes, scripts and schedules configured on the Shelly 1 Gen3 run locally on the device. Only remote notifications and cloud functionalities require an active internet connection.

Specifications