CHINT NB2-40ZT Smart Miniature Circuit Breaker,
combines traditional circuit protection with intelligent control and monitoring capabilities.
Designe for AC 50 Hz, 230 V circuits up to 40 A, it provides protection against overload, short circuit,
over-voltage, and under-voltage. With built-in RS485/Bluetooth communication, remote control,
and real-time monitoring, it supports energy management, fault diagnosis, and system automation.
Compact and efficient, the NB2-40ZT is ideal for smart homes, offices, and industrial control systems.
- Standards Compliance: IEC/EN 60898-1
- Certifications: CE, RoHS, REACH
- Rated Current (In): 6 A, 10 A, 16 A, 20 A, 25 A, 32 A, 40 A
- Poles: 1P
- Rated Voltage (Ue): 230 V AC
- Rated Frequency: 50 Hz
- Thermo-Magnetic Characteristic: Type C curve
- Rated Breaking Capacity (Icn): 6 kA
- Rated Insulation Voltage (Ui): 690 V
- Rated Impulse Withstand Voltage (Uimp): 4 kV
- Dielectric Test Voltage: 2 kV (1 min)
- Reference Temperature: 30 °C
- Ambient Operating Temperature: –25 °C to +70 °C
- Storage Temperature: –40 °C to +70 °C
- Applicable Altitude: ≤ 2000 m
- Protection Functions:
- Overload and short-circuit protection
- Over-voltage protection: Action threshold 280 V ±5 V
- Over-voltage recovery threshold: 250 V ±5 V
- Under-voltage protection: Action threshold 165 V ±5 V
- Under-voltage recovery threshold: 190 V ±5 V
- Non-driving time: ≥ 3 s (over/under voltage)
- Recovery time: ≥ 10 s (over/under voltage)
- Electrical Parameter Measurement Function:
- Current measurement: ±1.0% (1 A ≤ I < 0.1 In)
- Voltage measurement: ±0.5% (0.9 Ue ≤ U ≤ 1.1 Ue)
- Power measurement: ±1.5%
- Communication Functionality:
- Protocol: Modbus-RTU
- Interfaces: RS485, Bluetooth BLE 5.0 (compatible with BLE 4.0–4.2)
- Automatic networking via SMG (Smart Gateway)
- Mechanical and Electrical Life:
- Mechanical Life: 10,000 operations
- Electrical Life: 6,000 operations
- Installation and Construction:
- Mounting: DIN rail (TH35-7.5, standard)
- Connection: From top (cable/pin-type busbar)
- Terminal Capacity:
- Minimum: 1 mm²
- Maximum: 16 mm²
- Tightening Torque: 2.5 N·m
- Flame Retardant Grade: V-0
- Pollution Degree: 2
- Protection Degree: IP20
- Assembled Accessories: None
- Dimensions (mm): 78 × 18 × 49.5
