# Aqara Smart Lock U400

*Aqara / DL-D06E, DL-D16E, DL-D06D, DL-D16D, DL-D17D, DL-D15D*

> The Aqara Smart Lock U400 needs a Thread border router and a Matter controller, not an Aqara hub. It is a Thread deadbolt with native Matter, a fingerprint reader, a touchscreen keypad, Home Key tap, UWB hands-free unlock and Aliro. It suits HomeKit, Google Home, Alexa, SmartThings and Home Assistant users, with native support through Matter over Thread.

- Canonical page: https://smarthomecanon.com/devices/aqara-smart-lock-u400
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Aqara](https://smarthomecanon.com/brands/aqara) |
| Category | Lock |
| Model numbers | DL-D06E, DL-D16E, DL-D06D, DL-D16D, DL-D17D, DL-D15D |
| Status | Current[^1] |
| Lock family | Thread locks (native Matter)[^2][^3] |
| Radio | Thread, UWB, NFC[^2][^3] |
| Hub needed | A Thread-enabled Matter controller per ecosystem. UWB needs a Thread-enabled HomeKit home hub.[^2] |
| Matter path | withheld |
| HomeKit and Home Key | HomeKit through Matter: Home Key tap, UWB hands-free and Aliro. Samsung Wallet Digital Home Key through SmartThings.[^2][^3] |
| Unlock methods | Fingerprint (up to 50), touchscreen keypad, NFC (card sold separately), UWB hands-free[^3][^2] |
| Power | Removable rechargeable lithium battery, up to 6 months. USB-C.[^2] |
| Released | 2026-01-06[^1] |
| Aliro | Yes ('Aliro enabled lock')[^3] |
| Matter certification part number | withheld |
| Region | US. Samsung Wallet Digital Home Key via SmartThings.[^1][^3] |

## Integration paths

**How the Aqara Smart Lock U400 connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Matter / Thread](https://smarthomecanon.com/protocols/matter-thread) | Thread border router, Matter controller[^2] | unknown | unknown |

**Platform support for the Aqara Smart Lock U400**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Matter / Thread | [HomeKit](https://smarthomecanon.com/platforms/homekit) | Native[^3] |  |
| Matter / Thread | [Google Home](https://smarthomecanon.com/platforms/google-home) | Native[^3] |  |
| Matter / Thread | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Native[^3] |  |
| Matter / Thread | [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) | Native[^3] |  |
| Matter / Thread | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | Native[^3] |  |

## Releases

**Aqara Smart Lock U400 release events**

| Date | Event | Detail |
| --- | --- | --- |
| 2026-01-06[^1] | Released |  |

## Related pages

- [Aqara smart locks](https://smarthomecanon.com/lines/aqara-locks) (line)
- [Aqara](https://smarthomecanon.com/brands/aqara) (brand)
- [Matter over Thread](https://smarthomecanon.com/protocols/matter-thread) (protocol)
- [HomeKit](https://smarthomecanon.com/platforms/homekit) (platform)
- [Google Home](https://smarthomecanon.com/platforms/google-home) (platform)
- [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) (platform)
- [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) (platform)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)

## Sources

[^1]: Aqara US store catalog (Shopify product feed). https://us.aqara.com/products.json?limit=250 (manufacturer, checked 2026-10-08)
[^2]: Smart Lock U400 - Aqara US store. https://us.aqara.com/products/smart-lock-u400 (manufacturer, checked 2026-10-08)
[^3]: Smart Lock U400 - Aqara global site. https://www.aqara.com/en/product/smart-lock-u400/ (manufacturer, checked 2026-10-12)