CHINT NXB-80 Miniature Circuit Breaker (MCB),
provides reliable overload and short-circuit protection in residential, commercial,
and industrial applications. Designe for AC 230/400V systems with 70A and 80A rated currents, it ensures safety, stability,
and efficient current control. Built to IEC/EN 60898-1 standards, the NXB-80 offers positive isolation, high endurance,
and a 6kA breaking capacity, delivering long-term, maintenance-free performance in modern low-voltage power distribution systems.
- Compliant Standards: IEC/EN 60898-1
- Certifications: CE, RoHS
- Primary Functions: Overload protection, short-circuit protection, and positive isolation
- Rated Current (In): 70A, 80A
- Rated Voltage (Ue):
- AC230V for 1P, 1P+N
- AC400V for 2P, 3P, 3P+N, 4P
- Rated Frequency: 50/60Hz
- Number of Poles: 1P, 1P+N, 2P, 3P, 3P+N, 4P
- Tripping Characteristics: B, C, D curves (thermal-magnetic release)
- Rated Short-Circuit Breaking Capacity (Icn): 6kA
- Rated Impulse Withstand Voltage (Uimp): 4kV
- Mechanical Life: 20,000 operations
- Electrical Life: 6,000 operations
- Operating Temperature: –35°C to +70°C
- Storage Temperature: –35°C to +85°C
- Reference Temperature: 30°C
- Applicable Altitude: ≤2000m
- Terminal Capacity: 1.5–25 mm²
- Standard Connection Torque: 3.5 N·m
- Maximum Withstand Torque: 4 N·m
- Wire Insertion Depth: 15 mm
- Mounting: 35mm DIN rail (TH35-7.5)
- Protection Degree: IP20 (direct mount) / IP40 (in enclosure)
- Pollution Degree: Class II
- Cable Entry: Top or bottom
- Dimensions (mm):
- Height: 85.1 ± 0.4
- Width: 18 (1P) / 36 (2P) / 54 (3P) / 72 (4P)
- Depth: 77.8 ± 0.3
- Accessories Compatible: AX-X1, AL-X1, SHT-X1, OVT-X1, UVT-X1, OUVT-X1
