The CHINT NB1-63H 3P 40A 10kA D-Curve Miniature Circuit Breaker is designed for demanding industrial applications where high starting (inrush) currents are present. It provides dependable protection against overloads and short circuits, making it ideal for motors, compressors, transformers, and heavy-duty machinery in three-phase electrical systems.

The CHINT NB1-63H Miniature Circuit Breaker (MCB) provides dependable protection against overload and short-circuit faults in AC circuits up to 415 V. Engineered for residential, commercial, and industrial applications, it features a 10 kA breaking capacity, thermomagnetic trip, and multiple tripping curves for versatile use. With a compact modular design, IP20 protection, and compliance with IEC/EN 60898-1 standards, the NB1-63H ensures safe, efficient, and durable circuit control in modern power distribution systems.

Technical Specification: 

• Standard: IEC/EN 60898-1
• Rated Voltage (Ue): AC 415 V
• Rated Insulation Voltage (Ui): 500 V
• Rated Current (In): 40 A, 3P
• Rated Short-Circuit Breaking Capacity (Icu): 10,000 A
• Tripping Characteristics: Type D (10–14 In) protection for circuits which supply loads with high inrush current at the circuit closing (LV/LV transformers, breakdown lamps).
• Rated Frequency: 50/60 Hz
• Rated Impulse Withstand Voltage (Uimp): 6 kV
• Terminal Type: Cable / U-type busbar / Pin-type busbar
• Terminal Capacity: Up to 25 mm²
• Mounting: DIN-rail EN 60715 (35 mm)
• Connection: Top or bottom feed
• Auxiliary Accessories: Click here - Auxiliary contact, shunt release, under-voltage release, alarm contact
• Dimensions (mm): Height: 82, Depth: 75.5, Width: 54 mm

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