✅ CHINT NB1-63H C40 Miniature Circuit Breaker – 1P, 40A, C Curve, 10kA Breaking Capacity Description (English): The CHINT NB1-63H C40 miniature circuit breaker (MCB) is designed for heavy-duty protection of electrical circuits in residential, commercial, and industrial-grade installations. Rated at 40A with a C curve tripping characteristic, it is ideal for high-load circuits including HVAC systems, large appliances, and industrial outlets. With a high short-circuit breaking capacity of 10kA at 230V AC, the NB1-63H C40 ensures safe and reliable operation under fault conditions. It is certified to EN/IEC 60898-1 and EN/IEC 60947-2 standards for both residential and industrial applications. The MCB features a toggle actuator for manual switching, a VisiTrip indicator for fast fault identification, and a VisiSafe strip that visually confirms complete disconnection. Its compact 18mm design (2 DIN pitches) allows quick and secure mounting on DIN rails. Supporting an insulation voltage of 500V and impulse withstand voltage of 6kV, this device is built for durability with a mechanical life of 20,000 cycles and an electrical life of 10,000 cycles. It provides IP20/IP40 protection when enclosed and operates reliably within a wide temperature range from -35°C to +70°C. Specifications (English): Model: NB1-63H Poles: 1P Rated Current [In]: 40A Curve Type: C Breaking Capacity: 10kA at 230V 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, 2 pitch (18mm 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)