✅ CHINT NB1-63 C40 Miniature Circuit Breaker – 4P, 40A, C Curve, 6kA Breaking Capacity Description (English): The CHINT NB1-63 C40 is a four-pole miniature circuit breaker (MCB) designed for full protection of three-phase + neutral power systems. With a rated current of 40A and a C tripping curve, it is suitable for applications with balanced medium-load circuits such as HVAC units, machinery panels, and distribution boards in residential, commercial, and industrial environments. It features a short-circuit breaking capacity of 6kA at 400V AC in compliance with EN/IEC 60898-1 and up to 50kA as per EN/IEC 60947-2, ensuring complete protection from overloads and short circuits across all four poles. Equipped with a manual toggle switch, the breaker includes a VisiTrip indicator for fast fault identification and a VisiSafe strip for physical isolation verification. Its compact 72mm width (4 DIN pitches) makes it easy to install on standard DIN rails. The NB1-63 C40 is built to last with a mechanical endurance of 20,000 cycles and electrical life of 10,000 operations. It also includes a 500V insulation voltage, 6kV impulse withstand voltage, and IP20/IP40 protection when mounted in enclosures. Specifications (English): Model: NB1-63 Poles: 4P Rated Current [In]: 40A 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)