The NXB-63 Miniature Circuit Breaker (MCB) provides reliable protection against overload and short-circuit faults in low-voltage electrical systems. Designed for residential, commercial, and light industrial use, it features high breaking capacity (up to 10kA) and precise thermal-magnetic tripping characteristics (B, C, D curves). With compact dimensions, a long mechanical lifespan, and compliance with IEC/EN60898-1, the NXB-63 MCB ensures safe and stable performance for power distribution networks.

• Function: Protection against overload and short-circuit faults
• Standard Compliance: IEC/EN 60898-1
• Certifications: CE, SNI, NOM, EAC, SII, RoHS, REACH, Carbon Footprint
• Rated Current (In): 1A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
• Rated Voltage (Ue): 220V~/230V~/240V~ (1P, 1P+N, 2P); 380V~/400V~/415V~ (2P–4P, 3P+N)
• Frequency: 50/60 Hz
• Tripping Characteristics: B, C, D Curves
• Number of Poles: 1P, 1P+N, 2P, 3P, 3P+N, 4P
• Rated Short-Circuit Breaking Capacity (Icn): 6kA / 10kA (depending on model)
• Rated Service Short-Circuit Capacity (Ics): 6kA / 7.5kA
• Rated Insulation Voltage (Ui): 500V
• Rated Impulse Withstand Voltage (Uimp): 4kV
• Mechanical Life: 20,000 operations
• Electrical Life: 10,000 operations
• Mounting: 35mm DIN rail (TH35-7.5)
• Connection Type: Top or bottom wiring
• Terminal Capacity: Min: 1mm²; Max: 25mm²
• Tightening Torque: 2.0 N·m
• Operating Temperature: −35°C to +70°C
• Storage Temperature: −35°C to +85°C
• Altitude: ≤2000m
• Protection Degree: IP20 (direct mounting); IP40 (inside distribution box)
• Pollution Degree: Class II
• Compatible Accessories: AX-X1, AL-X1, SHT-X1, OVT-X1, UVT-X1, OUVT-X1
• Power Consumption (per pole): 3W (1–10A), up to 13W (63A)
• Dimensions: Compact modular design; fits standard distribution boards