Product Overview

Introduction

Product Name	SONOFF iPlug Wi-Fi Smart Plug
Product Model	S40TPB

S40TPB is a Wi-Fi smart plug supporting a maximum 15A load. With remote control via the app, you can not only monitor real-time power consumption but also set smart schedules and automatic control to make life more convenient. It uses flame-retardant materials and is equipped with multiple safety protections, such as overload protection and lightning surge protection, to effectively ensure the safety of your home's electricity use.

Applicable Types of Load Sockets	Applicable Types of Load Sockets

Highlights

• Remote Control

With the app, you can remotely control the socket on and off anytime and anywhere, and turn off high-power devices with one click, making energy-saving smarter. No more worrying about forgetting to turn off appliances, giving you full control over your household energy consumption!

• Ultra-Safe Protection Technology

Made with high-temperature flame-retardant PC material, effectively reducing the risk of fire. The plug features a super strong heat-insulating and fireproof design, ensuring it will not carbonize even under a maximum voltage of 400V. Additionally, the plug automatically disconnects from abnormal high voltage caused by lightning strikes or unstable power supply during thunderstorm weather, ensuring the safety of your devices.

• Energy Monitor

Track real-time and historical energy consumption directly from the eWelink App. Get detailed insights into your power usage, optimize device efficiency, and reduce electricity costs effortlessly.

• Overload Protection

When the device's operating current reaches 15A, the overload protection function will automatically cut off the power, effectively preventing the socket from damage due to excessive current.

• Timer & Schedule

Set up custom schedules and countdown timers to automate your appliances based on your lifestyle.

Applications

• Rice Cooker/Electric Kettle: Remote control and scheduling—cook meals or boil water before leaving work, enjoy hot food/drinks as soon as you get home.
• Monitor/Desk Lamp: Automatic shut-off after work hours to reduce standby power consumption.
• Charger: Smart timers for phone/tablet chargers to prevent overcharging and extend battery life.
• etc...

⚠️ Not recommended equipment: High-power inductive loads driven by motors (like air conditioners, refrigerators, or washing machines): These devices often draw a high inrush current at startup, which can exceed the plug's rated current and potentially cause damage. EV charging: EV charging typically demands higher power, often exceeding the plug's rated current capacity.

Specification

Model	S40TPB
MCU	BL602
Input	120V~ 60Hz
Max. Load	15A/1800W
Wireless Connectivity	Wi-Fi IEEE 802.11 b/g/n 2.4GHz
Net Weight	74g
Dimension	76x40x32mm
Color	White
Casing Material	PC V0
Applicable Place	Indoor
Working Temperature	-10℃~40℃
Working Humidity	5%~95% RH, non-condensing
Certified Compliance	ETL/FCC/ISED/RoHS

 

eWeLink Key Features

Device Home Page Functions​
Key Features	Feature Description
Open/Close Device	Control the on/off of the load.
​Energy Monitoring	Monitor active power/real-time current/real-time voltage
Electricity consumption	Support viewing the following information: Today's electricity usage / Today's usage duration; Real-time current / Real-time voltage / Today's electricity cost; Active power / Reactive power / Apparent power; View the electricity usage of the last 6 months / Daily usage over the past 6 months.
Smart Timer	Scheduled On/Off. Countdown Timer. Recurring on-off loops.

Device Settings
Key Features		Feature Description
Assign location		Set up the home and room where the device is located.
Share Device		The device can be shared with other eweLink accounts.
Third-party Platforms (Add the device to the eWeLink app via the SONOFF gateway, then sync it to the corresponding third-party platform through account linking.) ​ ​ ​ ​ ​ ​ ​ ​ ​	Alexa	voice control(open/close)
	Google Home	voice control(open/close)
	IFTTT	voice control(open/close)
	SmartThings	voice control(open/close)
	Alice	voice control(open/close)
	Salute	voice control(open/close)
Group Control		After multiple devices are created into a group, you can synchronize all devices in the group.
Smart Scene		Trigger condition: open/close /power value/daily power consumption / monthly power consumption. Execution action: open/close.
eWelink-Remote Control		If you have also purchased the SONOFF R5, you can add it as a "sub-device" to the S40TPB. By using the "Scene Function" in the eWeLink app, the two devices can be linked, allowing the Sonoff R5 to function as a convenient wireless remote controller.
Electricity Tariff Rate		Users can automatically calculate and display the daily electricity cost of devices connected to the socket based on the local electricity rate.
Overload Protection		When the Load Parameters exceed the set threshold, power is cut off to the device, and remote power restoration is supported.
Push Notifications		Push the device's on/off status and power consumption to the user.
LAN Control		A control method where the app communicates directly with the device over the same router, without going through the cloud platform. On/Off
Offline Alert		Turn on the "Offline Notifications" feature, and grant eWeLink notification permissions in Phone Settings > Permissions. You will receive a mobile push notification 5 minutes after the device goes offline. On/Off
Historical Logs		Records of device status changes. (You can view the operation records of the past three months.)
Power-on State		The device automatically turns off/turns on after being on for a specified duration.
Inching Settings		The device automatically turns off/turns on after being on for a specified duration.

​

Installation and Configuration Guide

 

① Button

Button	Description
Press & hold 5 seconds	Access to pairing mode
Press once	Turn on / off

②Network indicator (Blue)

Network indicator (Blue)	Description
Keeps on	The device is online.
Two short and one long flashes	The device is in pairing mode.
Quick flash	The router is not connected.
Flash twice	Connected to the router, but not connected to the cloud.
Flash three times	Firmware upgrade in progress.

③ Power LED indicator (Red)

Power LED indicator (Red)	Description
Light on	The device is on.
Light off	The device is off.

 

Add Device

Download App

Please download the "eWeLink" App from Google Play Store or Apple App Store.

eWeLink App Pairing

FAQ

1. Are smart plugs compatible with all electrical appliances?
Smart plugs work with most appliances that have a mechanical on/off switch, such as lights, fans, coffee makers, and heaters.

2. Do smart plugs increase power consumption?
Smart plugs consume an extremely small amount of standby power (usually below 1W).

3. Does the device need to be in the same room as Amazon Echo/Google Assistant?

No. The device is bound to the voice assistant through cloud-to-cloud integration. As long as the two accounts are paired and the devices are online, they can be controlled by the voice assistants anywhere.

4. Can I plug a power strip into the smart plug?

It is not suggested to connect a power strip to a smart plug. In general, a plug has a smaller maximum load capacity than a power strip. Furthermore, overload devices (for the smart plug) can be easily attached to the power strip without awareness, increasing the risk of product damage.

Troubleshooting

1. Why does the device shut off automatically even though I didn't enable "Overload Protection"?

The smart socket's maximum current and power thresholds are always active for safety. If the load exceeds these limits, the device automatically cuts off power to prevent overheating or fire hazards.

2. After turning off my TV using a smart plug, why can't I turn it back on with the remote control?
Most TVs enter standby mode when turned off with the remote. However, the smart plug cuts off all power to the TV when it turns it off. Therefore, after powering off with the plug, you should first turn the plug back on before using the TV remote to switch it on.