✅ CHINT NB1-63 C25 Miniature Circuit Breaker – 4P, 25A, C Curve, 6kA Breaking Capacity Description (English): The CHINT NB1-63 C25 is a four-pole miniature circuit breaker (MCB) designed for comprehensive protection of three-phase + neutral electrical systems. With a rated current of 25A and a C tripping curve, this breaker is ideal for balanced load circuits in residential, commercial, and light industrial applications, including motor circuits, control panels, and lighting systems. The device offers a rated short-circuit breaking capacity of 6kA at 400V AC (EN/IEC 60898-1), and up to 50kA per EN/IEC 60947-2, providing full protection from overloads and short circuits across all four poles. It features a toggle switch for manual control, a VisiTrip indicator for fast fault detection, and a VisiSafe strip for visual isolation confirmation. The NB1-63 C25 is DIN rail mountable, with a compact 72mm width (4 pitches), ensuring compatibility with standard panelboards. Engineered for durability, it supports 20,000 mechanical operations and 10,000 electrical operations. It also offers 500V insulation voltage, 6kV impulse withstand voltage, and IP20/IP40 protection in enclosed installations. Specifications (English): Model: NB1-63 Poles: 4P Rated Current [In]: 25A 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)