# Dimmer Synergy21 S21-LED-SR000079 — external rotary dimmer, black, DC 3V, 86×86×32 mm

**URL:** https://aio.lv/en/product--synergy21-s21-led-sr000079--12099302
**Data updated:** 2026-03-20 09:51 (EET)
**Category:** LED accessories
**Manufacturer:** Synergy21
**Manufacturer code:** S21-LED-SR000079
**EAN:** 4038816125231
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 42.49 €
**Prices and availability valid until:** 2026-08-02 23:59
**Price without VAT (21%):** 35.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--synergy21-s21-led-sr000079--12099302

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 17.07.2026 | free |
| Pickup points | 22.07.2026 | 1.89 EUR |
| Courier delivery to door | 22.07.2026 | 4.99 EUR |

## Summary description

Synergy21 S21-LED-SR000079 is an external rotary dimmer designed for DC 3 V control. The compact black housing measures 86×86×32 mm and provides manual brightness adjustment via a rotary control. Intended for use with compatible low-voltage LED systems and lighting circuits where an external, panel-mounted or surface-mounted dimming control is required.

## Long description

Synergy21 S21-LED-SR000079 is an external rotary dimmer designed for DC 3 V control, housed in a compact black enclosure measuring 86×86×32 mm. The device provides manual, stepless brightness adjustment via a tactile rotary knob and is intended for single-circuit low-voltage LED installations where an external surface- or panel-mounted control is required. The mechanical knob and straightforward mounting dimensions allow integration into typical wall-box or panel cutouts for retrofit or new installations.
Advantages
The rotary design delivers smooth, continuous dimming without noticeable steps, offering precise manual control of LED light level. Electronics are tuned for LED loads to reduce flicker and extend usable dimming range compared with basic resistive controls. Its compact footprint and standard mounting make installation simple, while the knob interface provides an immediate, intuitive way to set ambient lighting.
Suitable for
Residential rooms requiring adjustable ambient lighting such as living rooms, bedrooms and dining areas
Small commercial interiors including offices, meeting rooms and reception areas
Single-circuit LED lighting installations using low-voltage, dimmable fixtures
Retrofit projects replacing non-dimmable or incompatible dimmers with an LED-compatible rotary control
Key specifications
Control type: mechanical rotary knob providing stepless dimming
Supply/control voltage: DC 3 V control input
Circuit type: single-circuit (mono) dimming for one lighting circuit
Mounting: wall-mounted, suitable for standard recessed wall boxes and surface mounting
Dimensions: 86 × 86 × 32 mm (width × height × depth)
Color/finish: black housing
Load compatibility: designed for dimmable LED loads and low-voltage LED systems when used within device limits
How to use
Mount the dimmer in a suitable wall box or on a panel according to local electrical codes and the manufacturer wiring diagram. Connect the live and load conductors and any control lines required for DC 3 V operation, then restore power. Rotate the knob clockwise to increase brightness and counterclockwise to decrease it. The unit provides continuous adjustment within its operational load range; do not force the knob past its mechanical stops. Observe polarities and grounding practices appropriate to the installation.
Usage recommendations
Use with LED fixtures explicitly marked as dimmable and ensure the combined load of connected fittings falls within the dimmer’s supported range. Avoid connecting non-dimmable lamps or loads outside the device specification. For multi-fixture installations, verify compatibility of LED drivers and lamps to minimise flicker and ensure smooth dimming. If unsure about wiring or compatibility, consult a qualified electrician to confirm proper installation and optimal performance.

## Specifications

| Feature | Value |
|---|---|
| Type | Dimmer |
| Weight | 0.1 kg |
| Certification | CE |
| Operating temperature (T-T) | -10 - 60 |
| Height | 32 mm |
| Width | 86 mm |
| Depth | 86 mm |
| Product colour | Black |
| Case design | External |
| Control type | Rotary |
| International Protection (IP) code | IP20 |
| DC input voltage | 3 |
| Compliance certificates | RoHS |

## FAQ

### How much does the Synergy21 S21-LED-SR000079 external rotary dimmer cost, and is it available for purchase?

The price is 42.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 26 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 17.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Synergy21 products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Synergy21 service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12099302/67639017_large.webp