Chint NXB-63G
Miniature Circuit Breaker
6000A breaking capacity circuit breaker providing overload protection, short circuit protection, and positive isolation
Product Overview
The Chint NXB-63G miniature circuit breaker provides overload protection, short circuit protection, and positive isolation for electrical installations. Available in 1P, 2P, 3P, and 4P configurations with rated currents from 1A to 63A, it operates at 230V/240V or 400V/415V at 50/60Hz. It features an ultimate and service short-circuit breaking capacity of 6000A, an insulation voltage of 500V, and TH35-7.5-rail mounting.
Technical Parameters
| Poles | 1P, 2P, 3P, 4P |
| Compliant Standards | IEC/EN 60947-2, VC8036, SANS 556-1, SANS 60947-2 |
| Major Functions | Overload protection, short circuit protection, positive isolation |
| Rated Current (In) | 1A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Rated Voltage (Ue) | 230V~/240V~ (1P), 400V~/415V~ (2P, 3P, 4P) |
| Rated Ultimate Short-Circuit Breaking Capacity (Icu) | 6000A |
| Service Short-Circuit Breaking Capacity (Ics) | 6000A |
| Compatible Accessories | AX-X1, AL-X1, SHT-X1, OVT-X1, UVT-X1, OUVT-X1 |
| Certifications | CE, CB, LoA, RoHS |
| Rated Frequency | 50/60Hz |
| Number of Poles | 1P, 2P, 3P, 4P |
| Rated Instantaneous Short-Circuit Current Setting | 10In, 14.2In |
| Mechanical Life | 20000 cycles |
| Electrical Life | 10000 cycles |
| Rated Insulation Voltage (Ui) | 500V |
| Rated Impulse Withstand Voltage (Uimp) | 4kV |
| Reference Temperature for Setting of Thermal Element | 40℃ |
| Mounting | TH35-7.5-rail mounting |
| Cable Entry | Top or bottom entry |
| Pollution Degree | Pollution degree Ⅱ |
| Brand | Chint |
| Model | NXB-63G |
| Product type | Miniature Circuit Breaker |
| Applicable standard | IEC/EN 60947-2, VC8036, SANS 556-1, SANS 60947-2 |
Key Selling Points
✓ Provides overload protection, short circuit protection, and positive isolation
✓ Rated ultimate and service short-circuit breaking capacity of 6000A
✓ Mechanical endurance of 20000 cycles and electrical endurance of 10000 cycles
✓ Available in 1P, 2P, 3P, and 4P configurations with rated currents from 1A to 63A
✓ Standard TH35-7.5-rail mounting with flexible top or bottom cable entry
✓ Complies with IEC/EN 60947-2, VC8036, SANS 556-1, and SANS 60947-2 with CE, CB, LoA, and RoHS certifications
Technical Highlights
- Icu and Ics short-circuit breaking capacity rated at 6000A
- Rated insulation voltage Ui of 500V and rated impulse withstand voltage Uimp of 4kV
- Rated instantaneous short-circuit current settings of 10In and 14.2In
- Endurance performance of 20000 mechanical cycles and 10000 electrical cycles
- Reference temperature for thermal element setting calibrated at 40℃
- TH35-7.5-rail mounting and pollution degree II rating
- Compatible with AX-X1, AL-X1, SHT-X1, OVT-X1, UVT-X1, and OUVT-X1 accessories
Selection Guide
Select 1P configurations for 230V/240V applications or 2P, 3P, and 4P configurations for 400V/415V applications across rated currents from 1A to 63A with 10In or 14.2In instantaneous settings.
Reference Datasheet Pages
The following pages were selected from the model catalogue and are included for technical reference:
NXB-63G Catalog and Technical Data
