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Chint NB1-63D4P16 MCB – 4P – D Curve – 16A – 6kA
Chint NB1-63D4P16 16A four pole D curve miniature circuit breaker with 6kA breaking capacity for overload, short circuit and isolation protection in low-voltage electrical installations.
£24.79
Why Choose the Chint NB1-63D4P16 Miniature Circuit Breaker?
The Chint NB1-63D4P16 is a reliable four-pole miniature circuit breaker (MCB) designed to provide overload, short circuit and isolation protection in low-voltage electrical distribution systems. As part of the proven Chint NB1-63 series, it is suitable for commercial, industrial and OEM applications where dependable circuit protection is required.
This MCB features a D curve tripping characteristic, making it ideal for circuits with high inrush currents such as transformers, motors, discharge lighting and inductive loads. Its compact modular design allows straightforward installation in distribution boards and control panels using standard DIN rail mounting.
With a rated current of 16 A, a four-pole configuration and a 6 kA breaking capacity, the NB1-63D4P16 provides robust protection for three-phase circuits requiring simultaneous disconnection of all live conductors.
Key Advantages
- Reliable miniature circuit breaker for low-voltage protection.
- 16 A rated current for commercial and industrial circuits.
- D curve tripping characteristic suited to high inrush current loads.
- Four-pole design for complete circuit isolation.
- 6 kA short circuit breaking capacity.
- DIN rail mounting for fast installation in electrical panels.
- Suitable for distribution boards, machinery and OEM control systems.
Key Features
- Chint NB1-63 miniature circuit breaker series.
- 16 A rated current.
- 4 pole (4P) configuration.
- D curve magnetic trip characteristic.
- 6 kA rated breaking capacity.
- Provides overload, short circuit and isolation protection.
- Designed for 50/60 Hz low-voltage AC systems.
- Compact modular construction for distribution boards and panels.
Dependable Protection for High Inrush Circuits
Miniature circuit breakers such as the Chint NB1-63D4P16 automatically disconnect electrical circuits when overload or short circuit faults occur. This helps protect wiring, equipment and electrical installations from damage while supporting safe isolation during maintenance.
The D curve characteristic allows the breaker to tolerate higher short-duration starting currents before tripping, making it well suited to inductive loads and equipment that draws a heavy current at start-up. This helps reduce nuisance tripping while maintaining effective protection under fault conditions.
Typical Applications
- Industrial distribution boards.
- Commercial electrical installations.
- Three-phase control panels.
- Motor and transformer circuits.
- Machinery and OEM equipment.
- High inrush current electrical loads.
Technical Specifications
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| Current | 16 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | MCB | |
| Trip Curve | D curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | Chint | |
| Series | NB1-63 | |
| Model | NB1-63D4P16 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 16 A | |
| Number of poles | 4 Pole | |
| Tripping characteristic | D Curve | |
| Rated breaking capacity | 6 kA | |
| Rated voltage | 400 V AC for 2P, 3P and 4P devices | |
| 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 degree | IP20 | |
| Width | 18 mm per pole |
Frequently Asked Questions
What is the Chint NB1-63D4P16 used for?
The Chint NB1-63D4P16 is used to protect four-pole low-voltage electrical circuits against overloads and short circuits while also providing circuit isolation.
What current rating does this MCB have?
This miniature circuit breaker has a rated current of 16 A.
What does D curve mean on this circuit breaker?
A D curve MCB is designed for circuits with high inrush currents, such as transformers, motors and other inductive loads.
What is the breaking capacity of the NB1-63D4P16?
The NB1-63D4P16 has a rated short circuit breaking capacity of 6 kA.
Where is this MCB typically installed?
It is typically installed on a 35 mm DIN rail inside electrical distribution boards, control panels and machinery cabinets.
Trusted by Electrical Professionals Worldwide
Chint NB1 miniature circuit breakers are widely used by electricians, panel builders and industrial engineers for reliable overload and short circuit protection in modern low-voltage electrical installations.
