Smart relay switch | 1-channel | 16A | 3500W | 100-240V | Wi-Fi | SONOFF | MiniR3

Code: MINIR3

Barcode: 6920075776775

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Price 9.32 € VAT incl.
( 7.70 € VAT excl. )

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SONOFF MINIR3 is a single-channel Wi-Fi relay (16 A, 3500 W) for controlling heaters, water heaters and lighting. Controlled with the eWeLink app, by voice and with a local S-MATE switch via eWeLink-Remote. A neutral (N) wire is required.

Product description

Smart relay switch | 1-channel | 16A | 3500W | 100-240V | Wi-Fi | SONOFF | MiniR3

SONOFF MINIR3 is a single-channel Wi-Fi relay with a 16 A / 3500 W load rating, installed in a wall box or in an appliance supply circuit. It lets you control lighting or a higher-power appliance with the eWeLink app, by voice, by schedule or with an S-MATE switch.

Key idea:
When the 10 A of the MINIR4 is not enough – e.g. for a heater or water heater up to 3.5 kW – MINIR3 provides a 16 A load in the same small housing. With the S-MATE switch it is controlled locally even without internet.

Load
16 A / 3500 W

Connectivity
Wi-Fi 2.4 GHz

Local control
eWeLink-Remote up to 50 m

Dimensions
54 × 45 × 24 mm

How it works

The relay is wired into the load circuit: phase (L), neutral (N) and the output to the appliance. Because of the higher load, use cables with an appropriate cross-section.

Connected to 2.4 GHz Wi-Fi, the relay is controlled with the eWeLink app and by voice via Amazon Alexa or Google Assistant. Timers, schedules, scenes and groups can be created, and IFTTT extends automations.

With the SONOFF S-MATE switch the relay is controlled by the local eWeLink-Remote signal up to 50 m in open space – without internet or cloud. LAN control is also supported.

Why choose MINIR3?
A 16 A / 3500 W load in a compact housing and local eWeLink-Remote control allow reliable control of higher-power appliances without a contactor.

Technical specifications

Product type	Smart Wi-Fi relay (1 channel) for higher loads
Manufacturer / model	SONOFF MINIR3
Number of channels	1
Supply voltage	100–240 V AC, 50/60 Hz
Max. current	16 A
Max. power	3500 W
Wireless	Wi-Fi IEEE 802.11 b/g/n, 2.4 GHz
Local control	eWeLink-Remote with S-MATE, up to 50 m in open space; LAN mode
Apps and integrations	eWeLink, Amazon Alexa, Google Assistant, IFTTT
Housing	PC V0, white
Dimensions	54 × 45 × 24 mm
Installation	in a wall box or junction box, dry indoor locations

Main functions

16 A load – heaters, water heaters and other appliances up to 3500 W.
eWeLink-Remote – local control with the S-MATE switch without internet.
Timers and schedules – the appliance runs only at set times.
Scenes and groups – several appliances are controlled with one tap.
LAN mode – control on the local network without the cloud.
Voice control – Amazon Alexa and Google Assistant.

Where is it used?

Electric heaters and convectors up to 3.5 kW
Electric water heaters
Underfloor heating circuits up to 16 A
Outdoor lighting (relay in a dry box)
Ventilation equipment
Country houses and summer cottages

Use by need

For homeowners.
A heater or water heater is controlled from the phone and by schedule.

For electricians.
A 16 A relay in a small housing – suitable for boxes and appliance circuits.

For summer cottage owners.
Heating is switched on remotely before arrival.

Practical use

If a 2.5 kW convector in a summer cottage should switch on 3 hours before arrival, connect MINIR3 in the convector supply circuit and switch it on remotely or by schedule in the eWeLink app.

Pros

16 A / 3500 W load
Compact housing
eWeLink-Remote local control
LAN mode
Voice control and IFTTT

Cons / limitations

Neutral (N) wire required
2.4 GHz Wi-Fi only
Motors and large LED groups – via a contactor
Remote control requires internet

Safety and installation notes

Before installation switch off the circuit breaker and verify that no voltage is present
Installation must be carried out by a qualified electrician
Select the cable cross-section and circuit breaker for 16 A
Do not exceed 3500 W; use a contactor for inductive loads
Install only in dry indoor locations and tighten the terminals

Quick selection guide

1 channel

16 A / 3500 W

100–240 V AC

Wi-Fi 2.4 GHz

eWeLink-Remote

54 × 45 × 24 mm

Suitable when you need:

to control a heater or water heater from the phone
to automate a higher-power appliance by schedule
to control the relay locally with an S-MATE switch

Check before use:

the load current (up to 16 A)
whether an N wire is available
the cable cross-section
the 2.4 GHz Wi-Fi signal at the installation point

Important reminder: MINIR3 is not a protective device – it does not replace a circuit breaker, a residual current device or the safety thermostat of heating equipment.

FAQ

What load can be connected?
Up to 16 A / 3500 W.

Is a neutral wire required?
Yes, the relay is powered from L and N.

What is eWeLink-Remote?
A local S-MATE switch signal that controls the relay up to 50 m away without internet.

Does it work without internet?
Yes, with S-MATE and LAN mode; remote control requires internet.

How does it differ from MINIR4?
MINIR3 is designed for a higher load – 16 A instead of 10 A.

Is 5 GHz Wi-Fi supported?
No, 2.4 GHz only.

Smart relay switch | 1-channel | 16A | 3500W | 100-240V | Wi-Fi | SONOFF | MiniR3

SONOFF MINIR3 is a 16 A / 3500 W Wi-Fi relay for higher-power appliances: control with the eWeLink app, voice, schedules and a local S-MATE switch.

Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

Attributes

Manufacturer

Sonoff

CE certificate – a guarantee of safety, quality, and compliance

This product is marked with the CE label, which confirms that it complies with all applicable European Union directives and regulations. CE marking is not just a formality – it is an important indicator of quality and safety, ensuring that the product has been properly assessed, tested, and can be safely used throughout the EU market.

CE certification means that the product has been evaluated according to the main criteria:

Safety requirements – ensures that the product does not pose a risk to the user or the environment
Electromagnetic compatibility (EMC) – the device does not interfere with other equipment and is resistant to external disturbances
Environmental standards – complies with current ecological and material usage requirements
Operational reliability – the product is suitable for long-term use according to its intended purpose

CE marking allows this product to:

be legally supplied and used in all European Union countries
ensure a high level of quality and safety
be used in residential, commercial, and industrial environments

The CE mark is a declaration of the manufacturer’s responsibility, confirming that the product complies with all applicable standards and has been assessed according to EU legislation.

What does this mean for you as a buyer?

Safe use in everyday activities
Reliable performance and reduced risk of failure
Compliance with EU standards and requirements
Suitability for professional solutions

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