chint mcb nb1-63d2p20 20a, 2p 6ka dp d curve

Why Choose the Chint NB1-63D2P20 Miniature Circuit Breaker?

The Chint NB1-63D2P20 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 2 pole D curve MCB features a 20 A rated current, making it suitable for motors, transformers, compressors, solenoids and other equipment with high inrush currents. The D curve tripping characteristic is designed for highly inductive loads that generate substantial start-up currents.

With a rated short-circuit breaking capacity of 6 kA and a standard 35 mm DIN rail mounting format, the NB1-63D2P20 is easy to install within consumer units, distribution boards and electrical control panels. Its 2 pole design enables simultaneous disconnection of both conductors for improved circuit isolation.

Key Advantages

• Compact 2 pole miniature circuit breaker.
• 20 A rated current for high inrush current circuits.
• D curve trip characteristic for inductive 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.
• 20 A rated current.
• D curve tripping characteristic.
• 2 pole configuration.
• 6 kA breaking capacity.
• 230 / 400 V AC rated voltage.
• DIN rail mounting.
• Suitable for overload, short-circuit protection and circuit isolation.

Technical Specifications

• Manufacturer: Chint
• Series: NB1-63
• Model: NB1-63D2P20
• Product type: Miniature circuit breaker / MCB
• Rated current: 20 A
• Number of poles: 2 pole
• Tripping characteristic: D curve
• Rated voltage: 230 / 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 High Inrush Current Circuits

Miniature circuit breakers such as the Chint NB1-63D2P20 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 D curve characteristic makes this MCB suitable for circuits with high inrush currents, including motors, transformers, compressors, solenoids and other inductive loads. Its 2 pole construction provides simultaneous switching and protection across both conductors.

Typical Applications

• Industrial control panels.
• Motor protection circuits.
• Transformer protection.
• Compressor circuits.
• Control and auxiliary circuits.
• 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.