The CHINT NB1L RCBO combines residual current protection and magnetic over-current protection to provide comprehensive electrical safety. Designed for residential, commercial, and industrial applications, it safeguards circuits from overload, short-circuit, and earth leakage faults. With a compact DIN rail-mounted design and Type AC and Type A tripping classes, the NB1L ensures dependable performance in 230 V AC systems. Its 6 kA breaking capacity, fast tripping, and broad current range make it ideal for distribution systems requiring high reliability and user protection.

• Function: Provides combined protection against earth leakage, overload, and short-circuit faults
• Standards Compliance: IEC/EN 61009-1
• Tripping Type: Thermo-magnetic release
• Leakage Detection Type: Type AC, Type A, and Type A-SI (for C40 only)
• Rated Voltage (Ue): 220/230/240 V~
• Rated Current (In): 1 A, 2 A, 3 A, 4 A, 6 A, 10 A, 13 A, 16 A, 20 A, 25 A, 32 A, 40 A
• Rated Residual Operating Current (IΔn): 0.03 A, 0.1 A, 0.3 A (depending on model)
• Rated Residual Making and Breaking Capacity (IΔm): 6,000 A
• Rated Short-circuit Capacity (Icn): 6,000 A (6 kA)
• Rated Frequency: 50/60 Hz
• Rated Impulse Withstand Voltage (Uimp): 4 kV
• Insulation Voltage (Ui): 500 V
• Dielectric Test Voltage: 2 kV for 1 min
• Tripping Curves: B Curve (3–5 In): For long cable runs and TN/IT systems; C Curve (5–10 In): For resistive and inductive loads with low inrush current
• Break Time Under IΔn: ≤ 0.1 s
• Pollution Degree: 2
• Mechanical Life: 20,000 operations
• Electrical Life: 2,000–3,000 operations (depending on curve)
• Ambient Operating Temperature: –25 °C to +40 °C (average ≤ 35 °C)
• Storage Temperature: –25 °C to +70 °C
• Protection Degree: IP20
• Terminal Connection: Cable, U-type busbar, or pin-type busbar (top/bottom)
• Terminal Capacity: Cable: up to 25 mm² (AWG 18–3); Busbar: up to 10 mm² (AWG 18–8)
• Tightening Torque: 2 N·m (≈ 18 in·lbs)
• Mounting Method: 35 mm DIN rail, clip-on installation
• Connection Direction: From top or bottom
• Temperature Derating: Reference temperature 30 °C; derating factor 0.80 at 70 °C
• Dimensions (mm): 1P+N: 86 × 36 × 77 (H × W × D); 2P: 86 × 54 × 78 (H × W × D)