1. Product Overview
The Sonew Mini Circuit Breaker Smart Power Meter Switch is a 2-pole DIN rail mount device designed for intelligent electrical system management. It integrates circuit protection with smart metering capabilities, allowing remote control and real-time monitoring via a mobile application. This device provides protection against overcurrent, overload, over-voltage, under-voltage, and leakage, enhancing electrical safety and efficiency.
2. Safety Information
WARNING: Electrical shock hazard. Installation and maintenance should only be performed by qualified personnel. Always disconnect power at the main circuit breaker before working with electrical wiring.
- Ensure the device is installed in a dry environment, away from moisture and direct sunlight.
- Verify that the voltage and current ratings of the device match your electrical system requirements.
- Do not attempt to repair or modify the device. Contact qualified service personnel for assistance.
- Ensure all wiring connections are secure and properly insulated to prevent short circuits.
3. Specifications
| Specification | Value |
|---|---|
| Brand | Sonew |
| Current Rating | 63 Amps |
| Circuit Breaker Type | Standard |
| Mounting Type | DIN Rail Mount |
| Number Of Poles | 3 |
| Operating Voltage | 85-300V AC |
| Frequency | 50/60Hz |
4. Setup and Installation
This device is designed for DIN rail mounting within an electrical distribution box. Follow these steps for proper installation:
- Power Disconnection: Before starting any electrical work, ensure the main power supply to the distribution box is completely disconnected at the source. Use a voltage tester to confirm no power is present.
- Mounting: Attach the circuit breaker onto a standard 35mm DIN rail. The device features a compact design for easy integration into distribution boxes.
- Wiring: Connect the incoming and outgoing wires as indicated on the device. The terminals are typically marked 'N IN', 'L IN' for incoming Neutral and Live, and 'N OUT', 'L OUT' for outgoing Neutral and Live. Refer to the wiring diagram below for correct connections.

Image: Wiring diagram illustrating the connection points for Neutral (blue) and Live (red) wires on the Sonew Mini Circuit Breaker.

Image: Side view of the circuit breaker, highlighting the orange clip mechanism for secure DIN rail mounting.

Image: The compact Sonew Mini Circuit Breaker installed within a typical electrical distribution box, demonstrating its space-saving design and integration with a mobile application.
- Secure Connections: Tighten all terminal screws firmly to ensure good electrical contact and prevent loose connections.
- Power Restoration: Once all connections are secure and verified, restore power to the main circuit.
5. Operating Instructions
5.1 Initial Power-Up and Display
Upon power-up, the device's LCD screen will activate, displaying various electrical parameters. The indicator lights will also show the current status.

Image: A detailed view of the circuit breaker's LCD screen, displaying real-time measurements such as voltage (V), current (A), temperature (°C), and accumulated energy (Kwh).

Image: The device's display with clear labels for Temperature, Voltage, Current, Electric (energy), and Leakage values, demonstrating how these readings are mirrored and controlled via the connected smartphone application.
5.2 WiFi Network Configuration
To utilize smart features, connect the device to your WiFi network via the Tuya application.
- Download and install the Tuya Smart app on your mobile phone.
- Register or log in to your Tuya account.
- Follow the in-app instructions to add a new device. The WiFi indicator on the circuit breaker will blink during network configuration and become steady once successfully connected.

Image: The device's front panel, highlighting the WiFi indicator light. This light blinks during network setup and remains steady upon successful connection. Other indicators for Voltage, Current, and Leakage are also shown.
5.3 Remote Control and Monitoring
Once connected to the Tuya app, you can:
- Remote ON/OFF: Turn the circuit breaker on or off from anywhere using your mobile phone.
- Real-time Data: Monitor electricity, current, voltage, temperature, and leakage values in real-time.
- Timing Control: Set schedules for automatic power on/off for connected devices.
- Voice Control: Integrate with compatible voice assistants for hands-free operation.
- Prepaid Function: Utilize the prepaid recharge function available through the app.
6. Protection Features
The Sonew Mini Circuit Breaker provides comprehensive protection for your electrical system:
- Overcurrent Protection: Automatically trips the circuit when the current exceeds the rated limit (63A), preventing damage to appliances and wiring.
- Overload Protection: Similar to overcurrent, it protects against sustained excessive current draw.
- Over-voltage Protection: Disconnects power if the voltage rises above a safe threshold.
- Under-voltage Protection: Disconnects power if the voltage drops below a safe threshold, protecting sensitive electronics.
- Leakage Protection: Detects ground fault currents (leakage) and trips the circuit within 0.1 seconds to prevent electrical shock and fire hazards.
These protection thresholds can often be customized within the Tuya application settings.
7. Maintenance
- Regular Inspection: Periodically inspect the device for any signs of physical damage, loose connections, or discoloration.
- Cleaning: Ensure the device and its terminals are kept clean and free from dust and debris. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
- Functional Test: If equipped with a test button (not explicitly mentioned for this model, but common for leakage protection), perform periodic tests as recommended by electrical safety standards.
8. Troubleshooting
8.1 Device Not Powering On
- Check the main power supply to the distribution box.
- Verify all wiring connections are secure and correct.
- Ensure the circuit breaker is in the 'ON' position.
8.2 Circuit Breaker Trips Frequently
- Overload/Overcurrent: Disconnect some appliances from the circuit to reduce the load. Check for faulty appliances that might be drawing excessive current.
- Leakage: If the leakage indicator is active, there might be a ground fault. Disconnect appliances one by one to identify the faulty device or wiring.
- Voltage Issues: Check the incoming voltage. If it's consistently outside the normal range (85-300V AC), consult an electrician or your power provider.
- Device Fault: If the issue persists after checking external factors, the circuit breaker itself might be faulty.
8.3 Cannot Connect to WiFi/App
- Ensure your WiFi network is 2.4GHz (5GHz networks are typically not supported by smart home devices).
- Check your WiFi password and network stability.
- Ensure the device is within range of your WiFi router.
- Restart the circuit breaker and your router, then attempt to reconfigure the WiFi connection through the Tuya app.
9. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact the seller/manufacturer directly. Keep your purchase receipt for warranty claims.