Tomzn ATS WIFI Smart ATS 4P 220V AC Dual Power Automatic Transfer Switch Uninterrupted Remote Control 125A eWelink

TOMZN Din Rail eWeLink WiFi Smart ATS Timer – 4P 125A Automatic Transfer Switch

Ensure uninterrupted power supply for your home, office, or industrial system with the powerful TOMZN Din Rail eWeLink WiFi Smart ATS Timer 4P 125A. This intelligent dual power automatic transfer selector switch is designed to automatically switch between mains electricity and generator/inverter backup power in less than 50ms, helping protect sensitive equipment from power interruptions.

Featuring WiFi smart control via the eWeLink app, this ATS switch allows remote monitoring, timer scheduling, and smart automation directly from your smartphone. Its robust 4-pole 125A design makes it ideal for high-load applications including generators, solar systems, commercial installations, and industrial distribution panels.

The compact DIN rail mounting structure ensures easy installation and organized integration into standard electrical cabinets.

Key Features

• Automatic Dual Power Switching – Instantly transfers between utility power and backup generator/inverter supply.
• Ultra-Fast Switching Time – Less than 50ms transfer speed for continuous power protection.
• Smart WiFi Control – Remote monitoring and operation through the eWeLink mobile app.
• Programmable Timer Function – Automate switching schedules and power management.
• Heavy-Duty 125A Capacity – Suitable for demanding residential and commercial electrical loads.
• 4P Protection Design – Safe and reliable switching for dual power systems.
• DIN Rail Mounting – Easy installation inside standard distribution boards.
• High Surge Protection – 8kV rated impulse withstand voltage for improved electrical safety.
• Reliable Long-Life Performance – Durable electrical and mechanical lifespan.

Technical Specifications

• Brand: TOMZN
• Product Type: Smart Automatic Transfer Switch (ATS)
• Rated Supply Voltage (Us): AC (L/N) 220V–230V
• Frequency: 50Hz–60Hz
• Working Condition: 85% Us ~ 110% Us
• Rated Current: 125A
• Pole Configuration: 4P
• Switching Time: <50ms
• Action Time: <50ms
• Rated Impulse Withstand Voltage: 8kV
• Electrical Life: 2,000 operations
• Mechanical Life: 5,000 operations
• Connectivity: WiFi / eWeLink App
• Installation Type: DIN Rail

Applications

• Generator backup systems
• Solar and inverter systems
• Smart homes and offices
• Industrial control panels
• Commercial electrical systems

Upgrade your power management system with the TOMZN Smart ATS Switch — combining fast automatic transfer, intelligent WiFi control, and reliable, uninterrupted power switching for maximum convenience and protection.

Noted:

1.The product works with L+N 220-230V 50-60Hz.

2.The WIFI chip is powered by source A. When source A loses power, the product cannot switch via eWeLink.

3.Power-on State: After enabling this function, the device can perform automatic switching just like a normal ATS. However, when source A is powered on, the pointer of the ATS points to source B. And if source B loses power at this time, source B cannot switch to source A.