✅ CHINT NB1-63 C40 Miniature Circuit Breaker – 3P, 40A, C Curve, 6kA Breaking Capacity Description (English): The CHINT NB1-63 C40 is a triple-pole miniature circuit breaker (MCB) designed for reliable protection of three-phase electrical systems in commercial and industrial environments. With a rated current of 40A and a C tripping curve, it is suitable for high-load applications such as HVAC compressors, industrial motors, and heavy-duty distribution circuits. It delivers a rated short-circuit breaking capacity of 6kA at 400V AC per EN/IEC 60898-1, and up to 50kA according to EN/IEC 60947-2. This ensures comprehensive fault protection and operational safety across all three poles. The breaker includes a manual toggle, VisiTrip fault indication for quick diagnostics, and a VisiSafe strip for visual isolation verification. It is DIN rail mountable and compact with a 54mm width (3 pitches), making it ideal for modular distribution boards. With a mechanical endurance of 20,000 cycles and electrical endurance of 10,000 cycles, the NB1-63 C40 is a reliable choice for heavy-duty operations. It also supports 500V insulation voltage, 6kV impulse withstand, and IP20/IP40 protection inside enclosures. Specifications (English): Model: NB1-63 Poles: 3P Rated Current [In]: 40A Curve Type: C Breaking Capacity: 6kA at 400V AC (EN/IEC 60898-1) Insulation Voltage [Ui]: 500V AC Impulse Voltage [Uimp]: 6kV Standards: EN/IEC 60898-1, EN/IEC 60947-2 Mounting: DIN rail, 3 pitch (54mm width) Protection Class: IP20 (IP40 in enclosure) Operating Temperature: -35°C to +70°C Mechanical Life: 20,000 cycles Electrical Life: 10,000 cycles Tightening Torque: 2 Nm Wire Capacity: 1–25mm² (rigid), 1–16mm² (flexible)