✅ CHINT NB1-63H C40 Miniature Circuit Breaker – 3P, 40A, C Curve, 10kA Breaking Capacity Description (English): The CHINT NB1-63H C40 is a 3-pole miniature circuit breaker (MCB) engineered to provide high-reliability protection for three-phase circuits in commercial, industrial, and residential settings. With a rated current of 40A and a C curve tripping profile, it is well-suited for moderately inductive loads such as HVAC systems, industrial lighting, and heavy-duty equipment. Delivering a short-circuit breaking capacity of 10kA at 400V AC, the NB1-63H C40 ensures strong protection against electrical faults and overloads. It complies with the international safety standards EN/IEC 60898-1 and EN/IEC 60947-2. Equipped with a toggle-type manual actuator, this breaker includes a VisiTrip indicator for instant fault detection and a VisiSafe strip for visual confirmation of safe disconnection. With a 54mm width (6-pitch), it allows for easy DIN rail installation in compact distribution panels. Additional features include 500V insulation voltage, 6kV impulse withstand voltage, and long service life with 20,000 mechanical and 10,000 electrical operations. Operating temperature range: -35°C to +70°C. Specifications (English): Model: NB1-63H Poles: 3P 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, 6 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)