✅ CHINT NB1-63 C20 Miniature Circuit Breaker – 4P, 20A, C Curve, 6kA Breaking Capacity Description (English): The CHINT NB1-63 C20 is a four-pole miniature circuit breaker (MCB) designed for safe and efficient protection of three-phase + neutral circuits in residential, commercial, and light industrial applications. With a rated current of 20A and a C tripping curve, it is ideal for balanced load circuits involving small motors, lighting systems, and HVAC controls. It delivers a rated short-circuit breaking capacity of 6kA at 400V AC as per EN/IEC 60898-1, and up to 50kA according to EN/IEC 60947-2, ensuring reliable fault isolation and equipment protection across all four poles. The device includes a manual toggle actuator, VisiTrip indicator for quick identification of tripped circuits, and a VisiSafe strip for visual confirmation of physical isolation. Its 72mm width (4 DIN pitches) allows for easy installation in modular panelboards. Built to last, the NB1-63 C20 features a mechanical endurance of 20,000 cycles and electrical endurance of 10,000 cycles. It also supports 500V insulation voltage, 6kV impulse withstand voltage, and IP20/IP40 protection in enclosed systems. Specifications (English): Model: NB1-63 Poles: 4P 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, 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)