✅ CHINT NB1-63H C40 Miniature Circuit Breaker – 4P, 40A, C Curve, 10kA Breaking Capacity Description (English): The CHINT NB1-63H C40 is a 4-pole miniature circuit breaker (MCB) designed to provide safe, high-capacity protection in three-phase + neutral power distribution systems. With a rated current of 40A and a C-curve tripping profile, it is ideal for protecting medium-to-high inductive loads such as motors, HVAC units, and mixed load panels in commercial and industrial applications. This MCB offers a breaking capacity of 10kA at 400V AC, ensuring strong protection against short circuits and overloads. It complies with international safety standards EN/IEC 60898-1 and EN/IEC 60947-2, making it suitable for both residential and industrial environments. Features include a manual toggle actuator, a VisiTrip indicator for fast fault diagnosis, and a VisiSafe visual isolation strip. The device mounts easily on standard DIN rails and has a compact design of 72mm width (8-pitch). With a rated insulation voltage of 500V and impulse withstand voltage of 6kV, it is designed to perform reliably under demanding conditions. The breaker also supports up to 20,000 mechanical and 10,000 electrical operations and operates within a wide temperature range of -35°C to +70°C. Specifications (English): Model: NB1-63H Poles: 4P Rated Current [In]: 40A Curve Type: C Breaking Capacity: 10kA 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, 8 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)