TP-Link Kasa KS225 Matter Smart Wi‑Fi Dimmer Light Switch
The TP-Link Kasa KS225 Matter Smart Wi‑Fi Dimmer Light Switch is Matter certified (certificate CSA25198MAT45290-24, certified Mar 22, 2025). It uses Wi-Fi, so it needs no Thread border router, only your platform’s Matter controller. A certified Matter device can be added to any Matter controller whose app supports its device type, such as Apple Home, Google Home, Alexa, SmartThings or Home Assistant; features vary by app. The maker’s own site names Alexa. Sold in the US at Amazon.
Certificate data: CSA ledger read . Set-up steps and sources: Apple Home · Google Home · Alexa · SmartThings · Home Assistant
CSA Matter certified (certificate CSA25198MAT45290-24). Uses Wi-Fi, so it needs no Thread border router, only your platform’s Matter controller.
At a glance: Matter certified: Yes, Mar 22, 2025 · Connectivity: Wi-Fi, Bluetooth · Platforms: Amazon Alexa (named by the maker); Apple Home and Google Home (listed in its catalog record, unverified) · Thread border router: Not needed (uses Wi-Fi)
- Works with
- Amazon Alexa (named by the maker)
- CSA certificate
- CSA25198MAT45290-24, certified Mar 22, 2025
- Network & hub
- Wi-Fi; needs no Thread border router, only your platform’s Matter controller
- Model number
- KS225
Updated : the last change to this page’s certification, platform or store facts.
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Amazon
Where to buy
1 store
Check the model, region and pack size at the retailer. Prices and availability are confirmed there.
CSA Matter Certified
Certificate: CSA25198MAT45290-24Matter 1.3 certificate
Its certificate, CSA25198MAT45290-24, is for Matter 1.3, certified Mar 22, 2025. The Matter version is the specification version on the certificate's ledger record.
Source: CSA Distributed Compliance Ledger, read Oct 31, 2026.
What Matter 1.3 added, and which devices use it →Certified software versions
The CSA ledger lists 2 certified software versions for the device on certificate CSA25198MAT45290-24. The most recent is software 1.3.0, certified Mar 22, 2025, for Matter 1.3. That is the certificate this page shows.
- Software 1.3.0 · certified Mar 22, 2025 · Matter 1.3 · CSA25198MAT45290-24 · this page's certificate
- Software 1.0.0 · certified Jan 6, 2023 · Matter 1.0 · CSA23100MAT40613-24
Certification covers each software version listed. It does not establish the software on a unit you buy.
Source: CSA Distributed Compliance Ledger, device record (vendor ID 5009, product ID 514), read Oct 31, 2026.
The TP-Link Kasa KS225 is a Matter-certified smart Wi‑Fi dimmer light switch for single-pole lighting circuits. TP-Link says it requires a neutral wire. It supports 2.4 GHz Wi‑Fi, Bluetooth setup, brightness control, schedules, and voice control through Apple Siri, Amazon Alexa, and Google Assistant.
Specifications
- Brand
- Kasa
- Category
- Switches
- Protocols
- Wi-Fi, Bluetooth, Matter
- Certificate ID
- CSA25198MAT45290-24
- Certified
- Mar 22, 2025
- Model
- KS225
- Firmware
- 1.3.0
Ecosystem compatibility
Checked platforms are named on the maker’s own site. Unverified: listed in its catalog record, not confirmed by the maker; check exact controller support.
Quick answers
- Is the TP-Link Kasa KS225 Matter Smart Wi‑Fi Dimmer Light Switch Matter certified?
- Yes. MatterCatalog matches it to CSA Matter certificate CSA25198MAT45290-24, certified Mar 22, 2025.
- Does the TP-Link Kasa KS225 Matter Smart Wi‑Fi Dimmer Light Switch work with Apple Home or HomeKit?
- Likely. It is Matter certified (certificate CSA25198MAT45290-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Apple Home on a page we hold. Apple says an iPhone using iOS 18 or later can add Matter accessories to the Home app without a home hub. Apple’s Matter page lists lights among the accessory types the Home app supports.
- Does the TP-Link Kasa KS225 Matter Smart Wi‑Fi Dimmer Light Switch work with Google Home?
- Likely. It is Matter certified (certificate CSA25198MAT45290-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Google Home on a page we hold. Google says you need a Matter-enabled hub device set up on your home wireless network before you can add Matter devices to Google Home. Google’s supported-device-types page lists the Dimmable Light type.
- Does the TP-Link Kasa KS225 Matter Smart Wi‑Fi Dimmer Light Switch work with Alexa?
- Yes. The maker’s own site names Alexa, and it is Matter certified (certificate CSA25198MAT45290-24). Alexa needs a Matter-compatible Echo; Amazon says its Echo devices support “a subset of Matter 1.5 and lower device types”, so check that yours does.
- Does the TP-Link Kasa KS225 Matter Smart Wi‑Fi Dimmer Light Switch work with Samsung SmartThings?
- Likely. It is Matter certified (certificate CSA25198MAT45290-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named SmartThings on a page we hold. SmartThings adds Matter devices through the SmartThings app and a Matter controller.
- Does the TP-Link Kasa KS225 Matter Smart Wi‑Fi Dimmer Light Switch work with Home Assistant?
- Likely. It is Matter certified (certificate CSA25198MAT45290-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Home Assistant on a page we hold. Home Assistant says: “Adding a new Matter device only works in the Home Assistant Companion app.”
- Does the TP-Link Kasa KS225 Matter Smart Wi‑Fi Dimmer Light Switch use Thread or Wi-Fi?
- Wi-Fi. Its catalog record lists Wi-Fi, so it joins your Wi-Fi network and does not need a Thread border router. You still need your platform’s Matter controller.
- Does the TP-Link Kasa KS225 Matter Smart Wi‑Fi Dimmer Light Switch need a hub or a Thread border router?
- No hub of its own and no Thread border router: it joins your Wi-Fi network. You still need your platform’s Matter controller (a smart speaker, display, streaming box or hub), though Apple says an iPhone using iOS 18 or later can add Matter accessories without a home hub.
- When was the TP-Link Kasa KS225 Matter Smart Wi‑Fi Dimmer Light Switch Matter certified?
- The CSA certified it on Mar 22, 2025 (certificate CSA25198MAT45290-24). That is its certification date, not a retail release date, which MatterCatalog does not state.
- Where can I buy the TP-Link Kasa KS225 Matter Smart Wi‑Fi Dimmer Light Switch?
- MatterCatalog has verified store links for it at Amazon. Check the current price, model and pack size at the store.
From this product’s catalog record, not hands-on testing. Editorial policy
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Same CSA certificate, other catalog pages
These pages list a record with the same CSA certificate, CSA25198MAT45290-24. Check the pack size and finish on each page.
- TP-Link Kasa Smart KS225 Wi‑Fi Light Switch & Dimmer (Matter, 2‑Pack)Wi-Fi · CSA certificate on file · no US store link yet
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Kasa KS225
CSA certified