chint mcb nb1-63b1p20 20a, 1p 6ka sp b curve

Why Choose the Chint NB1-63B1P20 Miniature Circuit Breaker?

The Chint NB1-63B1P20 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 installations.

This 1 pole B curve MCB features a 20 A rated current, making it suitable for radial circuits, socket outlet circuits, lighting circuits and general-purpose electrical applications. The B curve tripping characteristic is designed for circuits with low inrush currents.

With a rated short-circuit breaking capacity of 6 kA and a standard 35 mm DIN rail mounting format, the NB1-63B1P20 is easy to install within consumer units, distribution boards and electrical control panels. Its compact modular construction supports neat installation and dependable long-term performance.

Key Advantages

• Compact 1 pole miniature circuit breaker.
• 20 A rated current for general-purpose circuits.
• B curve trip characteristic for circuits with low inrush current.
• 6 kA short-circuit breaking capacity.
• Reliable overload and short-circuit protection.
• Quick DIN rail installation in distribution boards and consumer units.

Key Features

• Chint NB1-63 series MCB.
• 20 A rated current.
• B curve tripping characteristic.
• 1 pole configuration.
• 6 kA breaking capacity.
• 230 V AC rated voltage.
• DIN rail mounting.
• Suitable for overload and short-circuit protection.

Technical Specifications

• Manufacturer: Chint
• Series: NB1-63
• Model: NB1-63B1P20
• Product type: Miniature circuit breaker / MCB
• Rated current: 20 A
• Number of poles: 1 pole
• Tripping characteristic: B curve
• Rated voltage: 230 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 Final Circuits

Miniature circuit breakers such as the Chint NB1-63B1P20 automatically disconnect electrical circuits when overloads or short circuits occur. This helps protect cables, connected equipment and electrical installations from damage caused by excessive current.

The B curve characteristic makes this MCB suitable for circuits with low inrush currents, including socket outlet circuits, radial circuits, lighting circuits and general-purpose electrical loads. Its modular DIN rail design allows straightforward integration into new or existing distribution systems.

Typical Applications

• Residential consumer units.
• Commercial distribution boards.
• Socket outlet circuits.
• Radial final circuits.
• Lighting and small power circuits.
• General electrical installations requiring 20 A 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.