Smart home light controller Synergy21 S21-LED-SR000042 — 12 W, 12–36 V, 20 A, 868.3 MHz, indoor, white

Synergy21 S21-LED-SR000042 is a compact indoor smart home light controller in white designed for integration with wireless home automation systems. The device operates at 868.3 MHz and accepts an input voltage range of 12–36 V with up to 20 A current handling. Rated for a connected load of 12 W, the controller provides stable control output for LED luminaires and is suitable for automating indoor lighting circuits in residential and light-commercial environments.

Advantages

The controller combines a small footprint and straightforward installation with support for common low-voltage LED systems. Operating at 868.3 MHz ensures compatibility with wireless home automation networks that use this frequency band. The wide input voltage range (12–36 V) and high current capability (up to 20 A) give flexibility for different LED power supplies and configurations while maintaining reliable LED operation. Its white enclosure is suited for discreet installation in indoor electrical cabinets or lighting control enclosures.

Suitable for

• Automating indoor LED lighting in homes and apartments
• Integration with wireless 868.3 MHz home automation systems and hubs
• Control of low-voltage LED strips and fixtures with 12–36 V supplies
• Retrofit projects where a compact indoor controller is required

Key specifications

• Rated power handling: 12 W connected load
• Input voltage range: 12–36 V DC
• Maximum input current: up to 20 A
• Operating frequency: 868.3 MHz for wireless communication
• Installation environment: indoor use, white enclosure

How to use

Mount the controller inside a suitable indoor electrical cabinet or lighting control enclosure following local electrical regulations. Connect the low-voltage supply (12–36 V) to the input terminals and wire the LED loads to the controller outputs, ensuring total current does not exceed the specified 20 A. Pair or integrate the controller with the home automation hub or receiver operating at 868.3 MHz according to the system instructions. Configure control parameters, scenes or schedules through the compatible hub or app to enable automated switching and dimming of connected LED luminaires. Verify each circuit during commissioning and make adjustments to dimming levels and timing as needed.

Usage recommendations

Install in a dry, ventilated indoor location and avoid exposure to direct moisture. Use supply wiring and protection devices sized for the maximum current rating and follow manufacturer and local electrical code guidance. For reliable wireless performance, ensure line-of-sight or minimal interference between the controller and the 868.3 MHz hub, and update controller firmware or hub software when compatible updates are available.