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Chint NB1-63D4P25 MCB – 4P – D Curve – 25A – 6kA
Chint NB1-63D4P25 25A four pole D curve miniature circuit breaker with 6kA breaking capacity for overload, short circuit and isolation protection in commercial and industrial electrical installations.
£24.79
Why Choose the Chint NB1-63D4P25 Miniature Circuit Breaker?
The Chint NB1-63D4P25 is a dependable four-pole miniature circuit breaker (MCB) designed to provide reliable overload, short circuit and isolation protection for low-voltage electrical installations. As part of the trusted Chint NB1-63 series, it is engineered to deliver long-lasting performance in commercial, industrial and OEM applications.
Featuring a D curve tripping characteristic, this MCB is ideal for circuits supplying motors, transformers, compressors and other equipment with high inrush currents. Its compact modular design allows fast installation onto standard DIN rails within distribution boards and control panels.
With a 25 A rated current, 6 kA breaking capacity and a four-pole configuration, the NB1-63D4P25 provides dependable protection and simultaneous isolation of all live conductors in three-phase electrical systems.
Key Advantages
- Reliable overload and short circuit protection.
- 25 A rated current for demanding electrical installations.
- D curve tripping characteristic for high inrush current loads.
- 6 kA breaking capacity for dependable fault interruption.
- Four-pole design provides complete circuit isolation.
- Compact DIN rail mounting simplifies installation.
- Suitable for commercial, industrial and OEM applications.
Key Features
- Chint NB1-63 miniature circuit breaker series.
- 25 A rated current.
- D curve tripping characteristic.
- 4 pole (4P) configuration.
- 6 kA rated breaking capacity.
- Provides overload, short circuit and isolation protection.
- Suitable for AC 50/60 Hz electrical systems.
- Compact modular DIN rail mounted construction.
Reliable Protection for High Inrush Current Circuits
Miniature circuit breakers automatically disconnect electrical circuits during overload and short circuit conditions, helping to protect electrical wiring, connected equipment and personnel. The NB1-63D4P25 combines thermal and magnetic tripping mechanisms to deliver fast and dependable protection.
Its D curve characteristic is specifically designed for applications with high starting currents, making it an excellent choice for motors, transformers, compressors and other inductive equipment while helping to minimise nuisance tripping during normal operation.
Typical Applications
- Industrial distribution boards.
- Motor control circuits.
- Transformer protection.
- Commercial electrical installations.
- OEM machinery and equipment.
- Three-phase control panels.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 25 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | MCB | |
| Trip Curve | D curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | Chint | |
| Series | NB1-63 | |
| Model | NB1-63D4P25 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 25 A | |
| Number of poles | 4 Pole | |
| Tripping characteristic | D Curve | |
| Rated breaking capacity | 6 kA | |
| Rated short-circuit service capacity | 6 kA | |
| Rated voltage | 400 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated insulation voltage | 500 V | |
| Rated impulse withstand voltage | 4 kV | |
| Standard | IEC/EN 60898-1 | |
| Mounting type | 35 mm DIN rail | |
| Protection rating | IP20 | |
| Mechanical life | Up to 20,000 operations | |
| Electrical life | Up to 4,000 operations | |
| Width | 18 mm per pole |
Frequently Asked Questions
What is the Chint NB1-63D4P25 used for?
It protects four-pole electrical circuits against overloads and short circuits while providing safe isolation for maintenance and servicing.
What current rating does this miniature circuit breaker have?
The NB1-63D4P25 has a rated current of 25 A.
Why choose a D curve miniature circuit breaker?
D curve MCBs are designed for equipment with high inrush currents, including motors, transformers, compressors and other inductive loads.
What is the breaking capacity of this MCB?
The NB1-63D4P25 has a rated short circuit breaking capacity of 6 kA.
Where is this MCB typically installed?
It is designed for installation on a standard 35 mm DIN rail inside electrical distribution boards, switchboards and industrial control panels.
Trusted by Electrical Professionals Worldwide
Chint NB1 miniature circuit breakers are trusted by electricians, panel builders and industrial engineers for delivering dependable circuit protection, long service life and reliable operation across a wide range of low-voltage electrical installations.
