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Manufacturer reference image for the four-key NK4 design. Exact Matter-version markings may differ.
Product overview
4-Key Rotary/Push-Button Smart Dimmer
Sunricher
Wall dimmer with a rotary control and four scene buttons for compatible dimmable lighting.
brightnesson/off
Key specifications
- Product type
- Wall dimmer with a rotary control and four scene buttons for compatible dimmable lighting.
- Connectivity
- Thread support stated by the manufacturer
- Power supply current
- Supply: 100–240 V AC, 50/60 Hz; Max current A: 2.2; Output channels: 1
- Power load limits
- LED or LED driver W: 230 V: 250; 110 V: 125; Incandescent HV halogen W: 230 V: 500; 110 V: 250; LV halogen electronic transformer W: 230 V: 250; 110 V: 125; Parallel loads max: 9
- Power minimum LED load
- Without neutral without bypass W: 7; Without neutral with bypass W: 3; With neutral: no minimum specified; Power factor: >0.5
- Neutral
- Optional
- LED load
- Up to 250 W at 230 V or 125 W at 110 V; minimum-load and wiring conditions apply
- Dimensions mm
- 83.5; 83.5; 50.9
Price & availability
Smattex
approx. USD 55.78 (One stated retail unit)Converted to USD using the exchange rate dated Nov 3, 2026 (Frankfurter (ECB)).Orderable · stock not confirmedGermanyChecked
Availability checked Nov 3, 2026 · Smattex · Germany · SKU SHM017 advertised as SR-MT2835RAC-NK4
Compatibility & installation requirements
Matter Controller: Required
Thread Border Router: Required
Thread support is stated by the manufacturer and has not been independently verified.
Additional installation notes (2)
- Distinct four-key panel; do not merge with the existing SR-MT2835RAC-S merely because their model prefix matches.
- Do not assume every scene-key action or metering value is exposed in every Matter ecosystem.