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Chint NB1-63CH4P20 MCB – 4P – C Curve – 20A – 10kA
Chint NB1-63CH4P20 4 pole C curve 20A miniature circuit breaker with 10kA breaking capacity for overload and short circuit protection in commercial and industrial electrical installations.
£26.64
Why Choose the Chint NB1-63CH4P20 Miniature Circuit Breaker?
The Chint NB1-63CH4P20 is a dependable 4 pole miniature circuit breaker (MCB) designed to provide reliable overload and short circuit protection in low voltage electrical distribution systems. As part of the high performance Chint NB1-63H Series, this device is suitable for commercial, industrial and control panel applications where compact DIN rail circuit protection is required.
With a 20 A rated current, C curve tripping characteristic and 10 kA breaking capacity, the NB1-63CH4P20 is suitable for protecting circuits that may experience moderate inrush currents. The 4 pole configuration allows simultaneous switching and isolation of multiple conductors, making it suitable for three phase electrical systems where full pole isolation is required.
Designed for straightforward installation in distribution boards and electrical enclosures, this Chint MCB provides reliable protection, compact dimensions and long service life. It is a practical choice for electrical contractors, panel builders, machine builders and maintenance engineers.
Key Advantages
- Compact 4 pole miniature circuit breaker for low voltage protection.
- 20 A rated current for distribution, control and power circuits.
- C curve trip characteristic suitable for mixed resistive and inductive loads.
- 10 kA breaking capacity for dependable fault protection.
- Provides protection against overload and short circuit conditions.
- DIN rail mounting for quick installation in panels and distribution boards.
- Suitable for commercial, industrial and OEM electrical systems.
Key Features
- Chint NB1-63H Series miniature circuit breaker.
- 20 A rated current.
- 4 pole configuration.
- C curve tripping characteristic.
- 10 kA rated breaking capacity.
- Provides overload and short circuit protection.
- Suitable for AC 50 / 60 Hz systems.
- Compact modular design for 35 mm DIN rail installation.
Reliable Protection for Electrical Distribution Systems
Miniature circuit breakers such as the Chint NB1-63CH4P20 help protect electrical installations by automatically disconnecting the circuit when overloads or short circuits occur. This helps reduce the risk of cable damage, equipment failure and unsafe fault conditions.
The C curve characteristic is designed for circuits with moderate inrush current, including socket circuits, control circuits, small inductive loads and general distribution applications. The 4 pole format provides simultaneous switching across all poles, supporting safe isolation and reliable protection in three phase electrical systems.
Typical Applications
- Electrical distribution boards.
- Industrial control panels.
- Machine control circuits.
- Commercial electrical installations.
- Building services systems.
- OEM machinery and automation panels.
- Three phase power distribution circuits.
Technical Specifications
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| Current | 20 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | MCB | |
| Trip Curve | C curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | Chint | |
| Series | NB1-63H | |
| Model | NB1-63CH4P20 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 20 A | |
| Number of poles | 4 pole | |
| Trip curve | C Curve | |
| Rated breaking capacity | 10 kA | |
| Rated voltage | 400 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated insulation voltage | 500 V | |
| Rated impulse withstand voltage | 4 kV | |
| Protection rating | IP20 | |
| Mounting type | 35 mm DIN rail | |
| Mechanical life | up to 20,000 operations | |
| Electrical life | up to 4,000 operations | |
| Operating temperature | -5°C to +40°C |
Frequently Asked Questions
What is the Chint NB1-63CH4P20 used for?
The Chint NB1-63CH4P20 is used to protect low voltage electrical circuits against overload and short circuit faults in distribution boards, control panels and industrial installations.
What current rating does this MCB have?
This miniature circuit breaker has a 20 A rated current, making it suitable for distribution, control and general power circuits.
What does C curve mean?
A C curve MCB typically trips between 5 and 10 times its rated current, making it suitable for circuits with moderate inrush current such as socket circuits, small inductive loads and general control circuits.
What is the breaking capacity of the NB1-63CH4P20?
The NB1-63CH4P20 has a 10 kA breaking capacity, providing dependable protection during short circuit fault conditions.
How is this circuit breaker installed?
The breaker is designed for installation on a standard 35 mm DIN rail inside electrical distribution boards, switchgear assemblies and control panels.
Trusted by Electrical Professionals Worldwide
Chint NB1 Series miniature circuit breakers are widely used by electrical contractors, panel builders and industrial engineers for reliable circuit protection, compact installation and dependable performance in modern electrical systems.
