Thirdreality Smart Switch Mt1, Over Thread, Retrofit
CSA Matter certified (certificate CSA2500CMAT44894-24). Uses Thread, so it needs a Thread border router as well as your platform’s Matter controller.
At a glance: Matter certified: Yes, Jan 14, 2025 · Connectivity: Thread · Thread border router: Needed (uses Thread)
- Works with
- Matter certified as an on/off light switch, so it can work with Matter apps such as Apple Home, Google Home, Alexa and SmartThings when the app supports its device type; supported features vary by app. The maker hasn’t named platforms on a page we hold.
- CSA certificate
- CSA2500CMAT44894-24, certified Jan 14, 2025
- Network & hub
- Thread; needs a Thread border router as well as your platform’s Matter controller
- Model number
- 3RSS02053MT
Independent guide. We may earn a commission through affiliate links. Direct non-affiliate links are labeled. How our links work

Amazon
Compare prices
2 stores
ThirdReality
Direct, non-affiliate linkNotes
Direct non-affiliate link to ThirdReality's US product page for Smart Switch MT1; it is the store's only product of this name (SKU P1TSSA1). Confirm the exact variant, current price and delivery at the retailer.
Check the model, region and pack size at the retailer. Prices and availability are confirmed there.
CSA Matter Certified
Certificate: CSA2500CMAT44894-24Thirdreality Smart Switch Mt1, Over Thread, Retrofit is a smart switch, listed as connecting over Thread; it is CSA Matter certified on January 14, 2025 (certificate CSA2500CMAT44894-24). ThirdReality says no wiring is needed: it snaps onto an existing toggle or rocker switch and runs on two AAA batteries, so no neutral wire is involved.
Specifications
- Brand
- THIRDREALITY
- Category
- Switches
- Protocols
- Thread
- Certificate ID
- CSA2500CMAT44894-24
- Certified
- Jan 14, 2025
- Firmware
- 1.0.0
Ecosystem compatibility
Quick answers
- Is this switch Matter certified?
- Yes. MatterCatalog matches it to CSA Matter certificate CSA2500CMAT44894-24, certified Jan 14, 2025.
- Does this switch use Thread or Wi-Fi?
- Thread. Its catalog record lists Thread, and Matter devices that use Thread need a Thread border router in the home, in addition to your platform’s Matter controller.
- Where can I buy this switch?
- MatterCatalog has verified store links for it at Amazon and ThirdReality. Check the current price, model and pack size at the store.
From this product’s catalog record, not hands-on testing. Editorial policy
Best Matter Smart Switches 2026
Buying guide to in-wall smart switches and dimmers with Matter support, compared from specifications.
Read the full buying guide →
More Matter switches
Each has a US store link. Models on the same Matter network with a CSA certificate on file come first.
- Inovelli White VTM31-SNThread · CSA certificate on file
- Aqara Dimmer Switch H2 USThread · CSA certificate on file
- SmartSetup Thread 1-Channel Power ControllerThread · CSA certificate on file
- Eve Dimmer SwitchThread · CSA certificate on file
- Aqara Light Switch H2Thread · CSA certificate on file
- Corston Smart In-Line Dimmer ModuleThread · CSA certificate on file
All 125 Matter switches sold in the US →All ThirdReality Matter devices →
Stay updated
Get notified when new Matter-certified devices launch.
No spam. Unsubscribe anytime.
Thirdreality Smart Switch Mt1
CSA certified