# Shelly Dimmer Gen4

*Shelly / S4DM-0A101WWL*

> The Shelly Dimmer Gen4 dims dimmable LED, incandescent and halogen lamps. It is a single-channel in-wall mains dimmer with Wi-Fi 6, Bluetooth, Zigbee and Matter. It suits Home Assistant users, with native support through Zigbee. Google Home, Alexa and SmartThings users reach it through an integration (the maker's cloud).

- Canonical page: https://smarthomecanon.com/devices/shelly-dimmer-gen4
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Shelly](https://smarthomecanon.com/brands/shelly) |
| Category | Switch |
| Model numbers | S4DM-0A101WWL |
| Status | Current[^1][^2] |
| Generation | Gen4[^3] |
| Model code | S4DM-0A101WWL[^4] |
| Control | Mains dimmer for dimmable lamps[^4] |
| Max load | LED 150 W, incandescent and halogen 200 W[^4] |
| Power measurement | Voltage and current[^4] |
| Radio | Wi-Fi 6, Bluetooth 5, Zigbee[^4] |
| Matter | withheld |
| Local API | HTTP API, MQTT and webhooks[^4][^5] |

## Integration paths

**How the Shelly Dimmer Gen4 connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Matter / Wi-Fi](https://smarthomecanon.com/protocols/matter-wifi) | Matter controller[^4] | unknown | unknown |
| [Zigbee](https://smarthomecanon.com/protocols/zigbee) | Zigbee coordinator[^4] | unknown | unknown |
| [Wi-Fi local](https://smarthomecanon.com/protocols/wifi-local) | withheld | withheld | unknown |
| [Wi-Fi cloud](https://smarthomecanon.com/protocols/wifi-cloud) | Vendor cloud account[^4] | No[^4] | unknown |

**Platform support for the Shelly Dimmer Gen4**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Zigbee | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | withheld | zigbee2mqtt |
| Wi-Fi local | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | withheld | Shelly |
| Wi-Fi local | [Homey](https://smarthomecanon.com/platforms/homey) | withheld | cloud.shelly.control |
| Wi-Fi cloud | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Via integration[^4] |  |
| Wi-Fi cloud | [Google Home](https://smarthomecanon.com/platforms/google-home) | Via integration[^4] |  |
| Wi-Fi cloud | [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) | Via integration[^4] |  |

## Related pages

- [Shelly dimmers](https://smarthomecanon.com/lines/shelly-dimmers) (line)
- [Shelly](https://smarthomecanon.com/brands/shelly) (brand)
- [Matter over Wi-Fi](https://smarthomecanon.com/protocols/matter-wifi) (protocol)
- [Zigbee](https://smarthomecanon.com/protocols/zigbee) (protocol)
- [Wi-Fi with local control](https://smarthomecanon.com/protocols/wifi-local) (protocol)
- [Wi-Fi through a cloud service](https://smarthomecanon.com/protocols/wifi-cloud) (protocol)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)
- [Homey](https://smarthomecanon.com/platforms/homey) (platform)
- [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) (platform)
- [Google Home](https://smarthomecanon.com/platforms/google-home) (platform)
- [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) (platform)

## Sources

[^1]: Shelly Dimmer Gen4 - Shelly Europe shop. https://www.shelly.com/products/shelly-dimmer-gen4 (manufacturer, checked 2026-10-09)
[^2]: Shelly Europe shop catalog (Shopify product feed, pages 1-3). https://www.shelly.com/products.json?limit=250&page=1 (manufacturer, checked 2026-10-09)
[^3]: Shelly Gen4 devices - Shelly Knowledge Base. https://kb.shelly.cloud/knowledge-base/shelly-gen4-devices (manufacturer, checked 2026-10-09)
[^4]: Shelly Dimmer Gen4 - Shelly Knowledge Base. https://kb.shelly.cloud/knowledge-base/shelly-dimmer-gen4 (manufacturer, checked 2026-10-09)
[^5]: Shelly Technical Documentation. https://shelly-api-docs.shelly.cloud/ (manufacturer, checked 2026-10-09)