✅ CHINT NB1-63 C50 Miniature Circuit Breaker – 3P, 50A, C Curve, 6kA Breaking Capacity Description (English): The CHINT NB1-63 C50 is a heavy-duty three-pole miniature circuit breaker (MCB) designed to protect three-phase circuits in commercial and light industrial applications. With a rated current of 50A and a C tripping curve, it is ideal for power distribution to large HVAC units, industrial socket outlets, and machinery with moderate inrush current. It provides a short-circuit breaking capacity of 6kA at 400V AC per EN/IEC 60898-1 and up to 50kA in compliance with EN/IEC 60947-2, offering reliable protection across all three poles against overloads and short circuits. The breaker includes a manual toggle actuator, VisiTrip indicator for fast fault identification, and VisiSafe strip for visual confirmation of isolation. Its 54mm DIN rail-mounted design ensures quick installation in standard modular panels. Engineered for durability, the NB1-63 C50 supports up to 20,000 mechanical operations and 10,000 electrical operations. It also features 500V insulation voltage, 6kV impulse withstand voltage, and IP20/IP40 protection when enclosed. Specifications (English): Model: NB1-63 Poles: 3P Rated Current [In]: 50A 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)