The CHINT NB1-63 Miniature Circuit Breaker is designed for reliable overload and short-circuit protection in low-voltage electrical installations. Compact and durable, it operates in AC 50/60 Hz, 230/400 V circuits, with rated currents up to 63 A and a breaking capacity of 6 kA. Its B, C, and D tripping curves accommodate different load types, while a long mechanical life ensures consistent performance in residential, commercial, and light industrial environments.

• Standards Compliance: SIRIM Product Cert (Label Licensing Program), IEC/EN 60898-1
• Function: Overload, short-circuit, and isolation protection
• Rated Voltage (Ue): 230 V~ for 1P; 400 V~ for 2P, 3P, 4P
• Rated Frequency: 50/60 Hz
• Rated Current (In): 6, 10, 13, 16, 20, 25, 32, 40, 50, 63 A
• Rated Breaking Capacity (Icn): 6 kA
• Rated Short-circuit Service Capacity (Ics): 6 kA
• Rated Insulation Voltage (Ui): 500 V
• Rated Impulse Withstand Voltage (Uimp): 4,000 V (1.2/50 μs)
• Tripping Characteristics: B Curve: 3–5 In (resistive loads, lighting); C Curve: 5–10 In (mixed loads, motor circuits); D Curve: 10–14 In (high inrush loads, transformers)
• Mechanical Life: 20,000 operations
• Electrical Life: 4,000 operations
• Ambient Operating Temperature: –5 °C to +40 °C
• Storage Temperature: –25 °C to +70 °C
• Reference Temperature: 30 °C
• Temperature Derating Coefficients: 0.95 at 40 °C; 0.90 at 50 °C; 0.85 at 60 °C
• Altitude Limit: ≤ 2000 m
• Mounting: TH35-7.5 DIN rail
• Connection: Top or bottom feed
• Terminal Capacity: 1–25 mm² (cable)
• Tightening Torque: 2.0 N·m
• Pollution Degree: 2
• Protection Degree: IP20
• Compatible Accessories: AX-5 (auxiliary contact), AL-X3 (alarm contact), SHT-X3 (shunt release), UVT-X3 (undervoltage release)
• Dimensions (mm): Height: 82; Depth: 75.5; Width: 18 mm per pole