Leviton Decora Smart D315S vs Kasa KS205 Wi-Fi Matter light switches: neutral wire, 3-way support, load ratings, setup, CSA certificates and stores compared.
Two Wi-Fi on/off Matter switches that both need a neutral wire
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Both are on/off Wi-Fi light switches with a CSA Matter certificate on file, and both makers say they need a neutral wire. Leviton’s store page lists wired or wire-free 3-way use and up to 15 A and 1/3 HP for the D315S; Kasa lists 15 A general use, 600 W incandescent and 1/6 HP for the KS205. Neither needs a Thread border router.
You need a 3-way setup: Leviton D315S
Leviton lists wired or wire-free 3-way use for the D315S; the KS205’s record describes a single-pole switch.
You switch a ceiling fan, exhaust fan or pump: Leviton D315S
Leviton says the D315S supports up to 15 A and 1/3 HP for lights, ceiling fans, exhaust fans, motors and pumps; Kasa lists 1/6 HP for motors on the KS205.
You want to set it up by scanning a code in a Matter app: Kasa KS205
Kasa says the KS205 can be set up by scanning its code in a Matter app such as Alexa, Google Home or Apple Home.
Your home has no Thread border router: either one
Both are Wi-Fi switches; neither needs a Thread border router.
Leviton
Leviton D315S Decora Smart Wi-Fi Switch is a smart switch. It is listed as connecting over Wi-Fi. It is CSA Matter certified, so it can work with Matter apps such as Apple Home…
Certification proof: CSA25943MAT47253-24 on the CSA registry
Kasa
The Kasa KS205 Matter Smart Wi‑Fi Light Switch is a single-pole 2.4 GHz Wi‑Fi wall switch with Matter support, voice control through Siri/Alexa/Google Assistant, schedules, and…
Certification proof: CSA25197MAT45289-24 on the CSA registry
The first rows repeat each product page, read from its catalog record. The rest quote the maker or the record, with the source linked in each cell. Prices load in your browser only when a store price was checked in the last 48 hours or an Amazon price was retrieved in the last 24 hours.
| What | Leviton D315S | Kasa KS205 |
|---|---|---|
| Current price | See price at Amazon | See price at Amazon |
| CSA Matter certificate | CSA25943MAT47253-24 | CSA25197MAT45289-24 (Mar 22, 2025) |
| Matter network (its record) | Wi-Fi | Wi-Fi |
| Needs a Thread border router? | No; it joins your Wi-Fi | No; it joins your Wi-Fi |
| Platforms the maker names | None on file; confirm with the maker | Amazon Alexa, Google Home |
| Stores we link | Amazon, Leviton | Amazon |
| Neutral wire | Required, per Leviton. Leviton D315S store page, read 2026-10-19 | Required, per Kasa. Kasa KS205 product page, read 2026-10-19 |
| Circuit | Single-pole, or wired or wire-free 3-way. Leviton D315S store page, read 2026-10-19 | Single-pole, per its record. Its catalog record |
| Load | Up to 15 A and 1/3 HP: lights, ceiling fans, exhaust fans, motors and pumps. Leviton D315S store page, read 2026-10-19 | 15 A general use, 600 W incandescent, 1/6 HP motor. Kasa KS205 product page, read 2026-10-19 |
| Maker app | My Leviton app for schedules. Leviton D315S store page, read 2026-10-19 | Kasa Smart app, with Bluetooth onboarding. Kasa KS205 product page, read 2026-10-19 |
Choose the Leviton D315S Decora Smart Wi-Fi switch when you need a 3-way setup, wired or wire-free, or you switch a fan or pump: Leviton lists up to 15 A and 1/3 HP. It needs a neutral wire, joins Wi-Fi, uses the My Leviton app for schedules and carries CSA certificate CSA25943MAT47253-24.
Choose the Kasa KS205 when a single-pole on/off switch is enough and you want Bluetooth setup in the Kasa Smart app or setup by scanning its code in a Matter app. Kasa lists 15 A general use and 600 W incandescent; it needs a neutral wire and carries CSA certificate CSA25197MAT45289-24 (March 2025).
The same answers each product page gives, from its catalog record and verified store links; a platform is named as confirmed only where the maker’s own site names it.
We have not performed hands-on testing. This page is built from MatterCatalog’s catalog records: each product’s CSA certificate and its scope, the network and platforms its record lists, the maker’s setup requirements and the stores with a verified link. It does not rank performance, reliability or price; check the current price, model and pack size at the store. Editorial policy