CHINT NXB-63H Miniature Circuit Breaker (MCB),
is designe for overload and short-circuit protection in residential, commercial,
and industrial electrical systems. Built in compliance with IEC/EN 60898-1, it delivers a high breaking capacity of 10kA, ensuring dependable performance and circuit isolation.
With B, C, and D tripping curves, and rated currents from 1A to 63A, the NXB-63H provides reliable protection and long service life, making it ideal for modern low-voltage power distribution applications.
- Compliant Standards: IEC/EN 60898-1
- Certifications: CE, SII, RoHS, Carbon Footprint
- Functions: Overload protection, short-circuit protection, and positive isolation
- Rated Current (In): 1A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
- Rated Voltage (Ue):
- 220/230/240V~ for 1P, 1P+N
- 380/400/415V~ for 2P, 3P, 3P+N, 4P
- Rated Frequency: 50/60Hz
- Number of Poles: 1P, 1P+N, 2P, 3P, 3P+N, 4P
- Tripping Curves: B, C, D (thermal-magnetic release)
- Rated Short-Circuit Breaking Capacity (Icu): 10kA
- Short-Circuit Service Capacity (Ics): 7.5kA
- Rated Insulation Voltage (Ui): 500V
- Rated Impulse Withstand Voltage (Uimp): 4kV
- Mechanical Life: 20,000 operations
- Electrical Life: 10,000 operations
- Power Consumption (per pole):
- 1–10A: 3W
- 16A: 3.5W
- 20–25A: 4.5W
- 32A: 6W
- 40A: 7.5W
- 50A: 9W
- 63A: 13W
- Temperature Derating (30°C reference):
- +10°C: 1.03×In
- +50°C: 0.91×In
- +70°C: 0.82×In
- Terminal Capacity: 1–25 mm² (solid wire), 1–16 mm² (flexible wire)
- Standard Connection Torque: 2 N·m
- Wire Insertion Depth: 11 mm
- Operating Temperature Range: –35°C to +70°C
- Storage Temperature: –35°C to +85°C
- Applicable Altitude: ≤2000m
- Mounting: 35mm DIN rail (TH35-7.5)
- Cable Entry: Top or bottom
- Pollution Degree: Class II
- Protection Degree:
- IP20 (direct mounting)
- IP40 (in distribution box)
- Accessories Compatible: AX-X1, AL-X1, SHT-X1, OVT-X1, UVT-X1, OUVT-X1
