Chint NB1-63D3P50 Triple Pole Type D MCB 50A 6kA

The NB1-63D3P50 is a high-performance miniature circuit breaker (MCB) designed to provide reliable protection for electrical circuits against overload and short-circuit faults. As part of the NB1-63 series, it is widely used in residential, commercial, and light industrial three-phase distribution systems where high inrush current loads require specialized protection.

This model features a 50A rated current with a 6kA breaking capacity, ensuring fast and safe interruption of fault currents to protect cables, equipment, and electrical installations. Its Type D tripping curve is specifically designed for circuits with very high inrush currents, such as large motors, transformers, welding equipment, and other heavy inductive loads.

With a 3-pole (3P) configuration, the NB1-63D3P50 provides simultaneous disconnection of all three phases, ensuring balanced and safe protection in three-phase systems. It is designed for DIN rail mounting, allowing easy and secure installation in standard distribution boards and control panels.

Key Features:

• Model: NB1-63D3P50
• Type: Miniature Circuit Breaker (MCB)
• Poles: 3P (Three Pole)
• Rated Current: 50A
• Breaking Capacity: 6kA
• Tripping Curve: Type D (10–20 In)
• Mounting: DIN rail installation
• Function: Overload and short-circuit protection