The SUON STB3-125/WJ Smart Circuit Breaker (C63, 4-Pole) is an industrial-grade smart breaker designed for high-current three-phase + neutral applications. With dual communication support (Wi-Fi + RS485) and Tuya platform integration, it enables remote control, real-time energy monitoring, and advanced automation for industrial, commercial, and high-power residential systems.
Example use
Install the breaker as a main 3-phase feeder to monitor total energy consumption per phase, remotely disconnect loads during faults, and automate shutdowns when current exceeds safe limits.
Key features
Brand / Model: SUON STB3-125/WJ
Poles: 4-Pole (3P + N)
Rated current: 63A, C-curve tripping characteristic
Voltage: 380–415V AC (three-phase) / 220–240V AC (phase-neutral)
Communication: Wi-Fi 2.4 GHz + RS485 (Modbus RTU compatible)
Platform: Tuya / Smart Life app
Remote control: App-based ON/OFF switching and remote reset
Energy monitoring: Real-time voltage, current, power (W), and energy (kWh) per phase
Protection: Over-current, over/under-voltage, short-circuit, and overload protection
Installation: Standard DIN-rail mount for electrical distribution panels
Use cases: Main incomers, EV chargers, solar systems, HVAC, industrial machines, commercial buildings
