WiFi Smart Home Circuit Protection & Remote Metering Devices

Smart Circuit Breakers & Metering

Industrial-Grade Smart Electrical Automation

Zhejiang TMB Electric Co., Ltd. provides comprehensive smart protection and control hardware compatible with Tuya Smart, Smart Life, and eWeLink applications. Our smart devices integrate real-time energy metering, programmable schedule timers, leakage detection, and over/under voltage protection straight onto standard 35mm DIN rail setups.

Smart ATS 2P/3P/4P WiFi Automatic Transfer Switch with Timer

eWeLink App63A–125A230V AC

$20.10 - $21.78

MOQ: 5 pcsUninterrupted

Bestseller WiFi Smart Voltage and Leakage Protector

WiFi Smart Voltage & Leakage Protector 220V 40A Digital Display

Tuya / App40ALeakage Cut

$9.91

MOQ: 5 pcsWall / Rail

Hot

3P+N WiFi Smart Circuit Breaker 180V–450V AC 1–63A DIN Rail

eWeLinkTimer RelayThree-Phase

$15.28 - $16.98

MOQ: 5 pcsDelay On/Off

110V/120V 3-Phase Smart ATS Dual Power Selector Switch 3P 125A

eWeLink110V/120VDIN Rail

$23.33

MOQ: 5 pcsDual Power

63A 4P Smart WiFi Circuit Breaker Remote Control Timer Relay

eWeLink AppCut Off L+N3-Phase

$16.98

MOQ: 5 pcs50/60 Hz

Smart

TOB9S-63WIFI 3-Phase Smart Breaker 63A 3P+N Remote Control

Tuya / SmartLifeCountdown120V/230V

$14.01

MOQ: 5 pcsEnergy Monitor

Bi-Directional Tuya WiFi Bidirectional Energy Meter

1P+N 65A Tuya Smart Bidirectional Energy Meter & Power Monitor

Bi-directionalSolar PVkWh Meter

$29.40

MOQ: 5 pcsHigh Precision

100A Tuya Smart Energy Meter Multifunctional Protector

100A Tuya WiFi Smart Energy Meter with Leakage & NTC Temp Sensor

100A MaxTemperatureMultifunction

$25.47

MOQ: 5 pcs110V/230V

Modular

BWF-Y02 DIN Rail 230V AC WiFi Switch Controller for Contactors

eWeLinkModularSmart Relay

$8.36

MOQ: 5 pcsHousehold

PV Compatible Single Phase Energy Meter with Voltage Current Protection

90-300VAC 60A Single Phase Energy Meter with Multi Protection

Bi-directionalAction DelayTimer

$12.61 - $17.20

MOQ: 5 pcsDIN Rail

Smart MCB

TOB1S-63M Tuya WiFi MCB with Voltage Current & Temp Protection

Tuya / SmartLifeOver/Under VThermal

$44.58

MOQ: 5 pcsShort Circuit

4-Pole

TOB1S-63M 4P 400V 63A Three-Phase WiFi Circuit Breaker

4P 400VTuya AppReal-time Info

$59.86

MOQ: 5 pcsIndustrial

Technical Specification Overview

Engineered for global power utilities, backup generator management, and renewable storage integration.

Device Category	Communication Protocol	Operating Voltage	Rated Current (In)	Primary Protection Functions
Smart WiFi Breaker	2.4GHz WiFi (Tuya / eWeLink)	AC 110V / 230V / 400V	1A to 63A / 100A	Overload, Short Circuit, High Temperature, Over/Under Voltage
Bi-directional Energy Meter	Tuya Smart / Smart Life	AC 90V–300V	Up to 65A / 100A	Forward/Reverse kWh, Real-time Voltage, Current, App Billing
WiFi Dual Power ATS	eWeLink / Tuya Support	AC 110V / 220V / 230V	63A / 100A / 125A	Automatic Source Transfer, Grid-Generator Scheduling, Remote Lock
Smart Voltage Protector	WiFi / Embedded MCU	AC 220V / 230V	40A to 80A	Surge Sag/Swell Cut-off, Earth Leakage Protection, Auto Reclose

WiFi Smart Home Solutions