Description: Model: M9U31263 Type: Miniature Circuit Breaker (MCB) Poles: 3 (Three-phase protection) Rated Current: 63 A Rated Voltage: 400 V AC Application: The M9U31263 MCB is primarily used for overload protection and short-circuit protection in electrical systems. It is typically used in three-phase systems, including motor protection, power distribution panels, and switchgear in residential and industrial environments. The breaker is also commonly used in light industrial applications and for lightning protection. Mounting: DIN rail mounted Standards Compliance: IEC 60898-1, UL 1077, CE marking Parameters: Rated Current (In): 63 A Number of Poles: 3 (for three-phase systems) Rated Voltage (Ue): 400 V AC (ideal for industrial and three-phase applications) Tripping Characteristics: Type C (trips between 5 to 10 times the rated current) Breaking Capacity (Icn): 6 kA (at 400 V AC) – The MCB can safely interrupt fault currents up to 6,000 A. Rated Frequency: 50/60 Hz Mechanical Durability: 20,000 cycles Electrical Durability: 10,000 cycles Rated Insulation Voltage (Ui): 690 V Rated Impulse Withstand Voltage (Uimp): 4 kV Temperature Range: -5°C to +40°C