✅ CHINT NB1-63 C63 Miniature Circuit Breaker – 4P, 63A, C Curve, 6kA Breaking Capacity Description (English): The CHINT NB1-63 C63 is a four-pole miniature circuit breaker (MCB) designed to deliver powerful protection for high-load three-phase + neutral installations. With a rated current of 63A and a C tripping curve, it is ideal for heavy-duty applications such as industrial machinery, large HVAC systems, and high-capacity distribution networks. It offers a short-circuit breaking capacity of 6kA at 400V AC in accordance with EN/IEC 60898-1 and up to 50kA per EN/IEC 60947-2, providing dependable protection against overloads and short circuits across all four poles. The breaker is equipped with a toggle actuator, VisiTrip fault indication for fast troubleshooting, and a VisiSafe strip that confirms complete disconnection. Its 72mm DIN rail-mountable format makes it easy to install in modular electrical panels. Built for reliability, the NB1-63 C63 offers 20,000 mechanical operations and 10,000 electrical operations. Additional specs include 500V insulation voltage, 6kV impulse withstand voltage, and enclosure protection ratings of IP20/IP40. Specifications (English): Model: NB1-63 Poles: 4P Rated Current [In]: 63A 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, 4 pitch (72mm 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)