The CHINT NXB-63 C32 3P Miniature Circuit Breaker is a thermal-magnetic protective device designed for three-phase AC electrical distribution systems. It provides protection against overload and short-circuit faults, with a 32A rated current, C-type tripping characteristic and 6kA short-circuit breaking capacity.
Its compact modular construction, three-pole switching mechanism and DIN-rail mounting make it suitable for distribution boards, control panels and industrial electrical installations.
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| Parameter | Specification |
|---|---|
| Brand | CHINT |
| Product Series | NXB-63 |
| Product Type | Miniature Circuit Breaker (MCB) |
| Model / Configuration | 3P C32 |
| Manufacturer Reference | 814173 |
| Rated Current (In) | 32A |
| Number of Poles | 3 Pole (3P) |
| Tripping Characteristic | C Curve |
| Rated Operational Voltage (Ue) | AC 380/400/415V |
| Rated Frequency | 50/60Hz |
| Rated Short-Circuit Breaking Capacity (Icn) | 6kA |
| Rated Service Short-Circuit Capacity (Ics) | 6kA |
| Rated Insulation Voltage (Ui) | 500V |
| Rated Impulse Withstand Voltage (Uimp) | 4kV |
| Protection | Overload and Short Circuit |
| Standard Compliance | IEC/EN 60898-1 |
| Certification | CE (series-level certification; verify applicable certificate for supply batch) |
| Mechanical Life | 20,000 operations |
| Electrical Life | 10,000 operations |
| Mounting | 35mm DIN Rail (TH35-7.5) |
| Connection | Top or Bottom Wiring |
| Terminal Capacity | 1–25mm² |
| Recommended Tightening Torque | 2.0 N·m |
| Operating Temperature | −35°C to +70°C |
| Storage Temperature | −35°C to +85°C |
| Maximum Installation Altitude | 2,000m |
| Protection Degree | IP20 (direct mounting); IP40 (inside distribution enclosure) |
| Pollution Degree | Class II |
The exact 3P C32, 6kA variant and reference 814173 are listed in CHINT’s official catalogue. Other electrical and mechanical parameters above are published for the NXB-63 series; check the latest model-specific documentation before using them as contractual specifications.
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Overload Protection: Automatically disconnects the circuit during sustained overcurrent conditions.
Short-Circuit Protection: Provides protection against short-circuit faults with a 6kA breaking capacity.
C-Type Tripping: Suitable for circuits with moderate inrush current.
Three-Pole Switching: Simultaneous switching of all three phases.
Compact Design: Modular construction for efficient panel space utilization.
DIN-Rail Installation: Compatible with standard 35mm DIN rails.
Positive Isolation: Provides a means of circuit isolation when switched OFF.
Visual Status Indication: Front indicator windows assist with checking breaker status.
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Suitable for use in:
Three-phase electrical distribution boards.
Industrial control and automation panels.
Commercial building distribution systems.
Machinery and equipment protection.
Lighting and power distribution circuits.
HVAC and auxiliary electrical circuits.
General-purpose three-phase branch circuits.
Engineering note: The breaker must be selected according to cable ampacity, load characteristics, prospective short-circuit current and coordination with upstream and downstream protective devices. A 32A rating does not automatically make it suitable for every 32A load.
| Parameter | Catalogue Information |
|---|---|
| Pole Configuration | 3P |
| Modular Width | 54mm |
| Mounting Rail | TH35-7.5 DIN Rail |
| Connection Direction | Top or Bottom |
| Terminal Arrangement | 3 Input and 3 Output Terminals |
| Installation | Inside a suitable electrical enclosure |
The 54mm modular width is based on the three-pole catalogue drawing. Confirm the complete height and depth against the latest CHINT dimensional drawing before panel fabrication.
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| Characteristic | Details |
|---|---|
| Thermal Protection | Protects against overload current |
| Magnetic Protection | Protects against short-circuit current |
| C-Curve Instantaneous Trip Range | 5–10 × rated current |
| Rated Current | 32A |
| Approximate Magnetic Trip Range | 160–320A |
The C-curve range is based on IEC 60898-1 characteristics. Actual operation depends on the fault current and trip time characteristics.
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The NXB-63 series supports the following accessory families, subject to model and compatibility confirmation:
AX-X1 – Auxiliary Contact
AL-X1 – Alarm Contact
SHT-X1 – Shunt Trip
OVT-X1 – Overvoltage Trip
UVT-X1 – Undervoltage Trip
OUVT-X1 – Overvoltage/Undervoltage Trip
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Installation must be performed by a qualified electrician.
Isolate and verify the supply is disconnected before installation.
Mount the breaker securely on a compatible 35mm DIN rail.
Use appropriately sized conductors and suitable cable lugs or termination methods.
Tighten terminals to the manufacturer’s specified torque.
Verify phase connections and terminal tightness before energizing.
Confirm the available fault level does not exceed the breaker’s rated breaking capacity.
Select the breaker in coordination with the protected cable and connected equipment.
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CHINT NXB-63 C32 3P 32A 6kA MCB | VITS Pakistan
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Buy CHINT NXB-63 C32 3P 32A 6kA MCB from VITS. Features C-curve tripping, overload and short-circuit protection, and IEC/EN 60898-1 compliance.
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CHINT NXB-63 C32 3 Pole 32A 6kA Miniature Circuit Breaker.
| Item | Details |
|---|---|
| Manufacturer | CHINT |
| Series | NXB-63 |
| Exact Model | 3P C32 6kA |
| Product Code | 814173 |
| Product Category | Electrical Protection Devices |
| Subcategory | Miniature Circuit Breakers |
| Website Display Name | CHINT NXB-63 C32 3P 32A 6kA MCB |
Q1. What is the rated current of this MCB?
The rated current is 32A.
Q2. What does C32 mean?
C indicates the C-type tripping characteristic, while 32 indicates the rated current of 32A.
Q3. What is the breaking capacity?
The rated short-circuit breaking capacity is 6kA.
Q4. Is this a single-phase or three-phase breaker?
It is a three-pole breaker designed for three-phase electrical circuits.
Q5. Which standard does it comply with?
IEC/EN 60898-1.
Q6. Can it be installed in a distribution panel?
Yes. It is designed for standard 35mm DIN-rail mounting inside a suitable electrical enclosure.
Short Description – CHINT Miniature Circuit Breakers (MCB) 6kA
Specification Details
Product Type Miniature Circuit Breaker (MCB)
Breaking Capacity 6kA
Compliance Standard IEC 60898-1
Certification CE
Protection Overload & Short Circuit
Rated Current 1A – 63A
Rated Frequency 50/60Hz
Electromagnetic Release Type B, C, D
Number of Poles 1P, 2P, 3P, 4P
Rated Impulse Withstand Voltage (Uimp) 4kV
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