# Smart switch Sonoff SPM-4Relay 4-channel Wi‑Fi relay module 4×20A

**URL:** https://aio.lv/en/product--sonoff-spm-4relay--8604344
**Data updated:** 2025-12-30 08:35 (EET)
**Category:** Home Automation
**Manufacturer:** Sonoff
**Manufacturer code:** SPM-4Relay
**EAN:** 6920075776980
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 51.49 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 42.55 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sonoff-spm-4relay--8604344

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.89 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Sonoff SPM-4Relay is a 4-channel smart Wi‑Fi relay module with four independent outputs, each rated up to 20 A. Designed for remote control and automation of lighting, appliances and circuits, it supports individual channel switching and scheduling via mobile app. Ideal for home and small commercial electrical control tasks, it simplifies centralized management and remote monitoring.

## Long description

Sonoff SPM-4Relay smart switch is a 4-channel Wi‑Fi relay module with four independent outputs, each rated up to 20 A. Used together with the SPM-Main module (sold separately), it enables per-channel power measurement and centralized control for home or commercial electrical systems. The unit is designed for DIN-rail mounting and provides overload protection and remote monitoring via the eWeLink app.
Advantages
The Sonoff SPM-4Relay supports four independent channels with individual switching and a maximum load of 20 A per channel (80 A total). When paired with the SPM-Main it provides accurate power consumption measurement and stable long-distance data transmission over RS-485, while the SPM-Main connects to the cloud via Ethernet or Wi‑Fi. The device includes overload protection and load-delay features and is sized for convenient DIN-rail installation.
Suitable for
Remote control and monitoring of apartment or multi-tenant energy consumption
Power management in offices, retail centers and commercial premises
Protection and control of equipment in server rooms and cryptocurrency mining rigs
Centralized switching and automation of lighting and appliances
Key specifications
Brand: Sonoff
Model: SPM-4Relay
Channels: 4 independent channels
Rated current: 20 A per channel, 80 A max.
Input / Output: 100–240 V ~50/60 Hz
Material: PC V0
Dimensions: 250 × 90 × 66.5 mm
Connectivity (with SPM-Main): RS-485 control; SPM-Main connects via Ethernet or Wi‑Fi
How to use
Mount the SPM-4Relay on a DIN rail and connect each load to one of the four output channels following local electrical codes. Install and configure the SPM-Main (sold separately) to enable power measurement and cloud connectivity; the SPM-Main communicates with SPM-4Relay devices over RS-485. Use the eWeLink application to assign channel names, create schedules, monitor real-time consumption and set overload thresholds. Ensure correct wiring and that the total current does not exceed device ratings.
Usage recommendations
For reliable operation, pair each SPM-4Relay with an SPM-Main for centralized measurement and cloud access, confirm that each circuit does not exceed 20 A, and follow local electrical safety regulations when installing and wiring the device.

## FAQ

### How much does the Sonoff SPM-4Relay 4-channel Wi‑Fi relay switch cost, and is it available for purchase?

The price is 51.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 03.07.2026 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 Sonoff 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 Sonoff 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

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