chint mcb nb1-63c3p63 63a, 3p 6ka 3p c curve

Why Choose the Chint NB1-63C3P63 Miniature Circuit Breaker?

The Chint NB1-63C3P63 is a compact and dependable miniature circuit breaker (MCB) designed to protect low voltage electrical circuits against overloads and short circuits. As part of the Chint NB1-63 series, it provides reliable circuit protection for residential, commercial and light industrial electrical installations.

This 3 pole C curve MCB features a 63 A rated current, making it suitable for three-phase distribution boards, power circuits, control panels, small motors, transformers and mixed inductive loads. The C curve tripping characteristic allows for moderate inrush currents, making it suitable for commercial and light industrial applications.

With a rated short-circuit breaking capacity of 6 kA and a standard 35 mm DIN rail mounting format, the NB1-63C3P63 is easy to install within distribution boards and electrical control panels. Its 3 pole design provides simultaneous isolation and protection across all three phases.

Key Advantages

• Compact 3 pole miniature circuit breaker.
• 63 A rated current for three-phase circuits.
• C curve trip characteristic for moderate inrush current loads.
• 6 kA short-circuit breaking capacity.
• Reliable overload and short-circuit protection.
• DIN rail installation in distribution boards and control panels.

Key Features

• Chint NB1-63 series MCB.
• 63 A rated current.
• C curve tripping characteristic.
• 3 pole configuration.
• 6 kA breaking capacity.
• 400 V AC rated voltage.
• 35 mm DIN rail mounting.
• Suitable for overload, short-circuit protection and circuit isolation.

Technical Specifications

• Manufacturer: Chint
• Series: NB1-63
• Model: NB1-63C3P63
• Product type: Miniature circuit breaker / MCB
• Rated current: 63 A
• Number of poles: 3 pole
• Tripping characteristic: C curve
• Rated voltage: 400 V AC
• Rated frequency: 50 / 60 Hz
• Rated short-circuit breaking capacity: 6 kA
• Rated insulation voltage: 500 V
• Rated impulse withstand voltage: 4 kV
• Protection rating: IP20
• Mounting type: 35 mm DIN rail
• Standards: IEC / EN 60898-1

Reliable Protection for Three-Phase Mixed Load Circuits

Miniature circuit breakers such as the Chint NB1-63C3P63 automatically disconnect electrical circuits when overloads or short circuits occur. This helps protect wiring, connected equipment and electrical installations from excessive current and fault conditions.

The C curve characteristic trips between five and ten times the rated current, making it suitable for mixed resistive and inductive loads, control circuits, small motors, transformers and three-phase circuits with moderate inrush current.

Typical Applications

• Three-phase distribution boards.
• Industrial control panels.
• Lighting and power circuits.
• Control and signalling circuits.
• Small motors and transformers.
• Electrical installations requiring 63 A three-phase protection.

Trusted by Electrical Professionals Worldwide

Chint miniature circuit breakers are trusted by electricians, panel builders and maintenance engineers for dependable circuit protection across residential, commercial and industrial electrical installations.