✅ CHINT NB1-63 C20 Miniature Circuit Breaker – 3P, 20A, C Curve, 6kA Breaking Capacity Description (English): The CHINT NB1-63 C20 is a three-pole miniature circuit breaker (MCB) engineered for three-phase circuit protection in residential, commercial, and light industrial applications. With a rated current of 20A and a C tripping curve, it is ideal for protecting motors, lighting systems, and other inductive loads with moderate inrush current. It provides a rated short-circuit breaking capacity of 6kA at 400V AC (EN/IEC 60898-1), and up to 50kA (EN/IEC 60947-2), ensuring reliable fault interruption and load protection across all three poles. The MCB features a manual toggle switch, VisiTrip indicator for fast fault identification, and VisiSafe strip for visual confirmation of isolation. Its compact DIN rail-mountable design (54mm width) allows for efficient panel space management. With a mechanical life of 20,000 cycles and an electrical life of 10,000 cycles, the NB1-63 C20 offers durable, long-term protection. It also supports 500V insulation voltage, 6kV impulse withstand voltage, and IP20/IP40 enclosure protection. Specifications (English): Model: NB1-63 Poles: 3P Rated Current [In]: 20A 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)