PXB2-63 Miniature Circuit Breaker (MCB)
The PXB2-63 miniature circuit breaker provides overload and short-circuit protection within the published 6A–63A range. Its verified product data lists 4.5kA Icn = Ics, 1P / 2P / 3P / 4P and B / C / D. Final selection must match the conductor, load, prospective fault current, installation system and applicable local rules.
Product Overview
PXB2-63 is a 4.5kA Icn = Ics miniature circuit breaker covering 6A–63A. It is available with 1P / 2P / 3P / 4P and B / C / D trip options as stated in the product data.
The model data references IEC 60898-1; GB/T 10963.1 and lists CCC certification. Standards, certification scope and technical documents must be confirmed for the ordered configuration and destination market.
Key Features
Typical Applications
It is intended for AC distribution circuits where the selected current rating, curve, pole arrangement and breaking capacity match the conductor and system study. Typical project contexts include residential, commercial and light-industrial final distribution; suitability depends on the actual circuit rather than the application label alone.
Applications and Selection Guide
Use the product-specific values below as a shortlist, then validate the complete circuit design. Product ratings do not replace a fault-current study, conductor calculation, coordination review or applicable installation rules.
| Selection point | PXB2-63 option | What the project must confirm |
|---|---|---|
| Rated current | 6A–63A | Coordinate with design current, conductor ampacity, ambient temperature and grouping |
| Trip curve | B / C / D | Choose for load inrush and required fault-clearing performance, not by current alone |
| Breaking capacity | 4.5kA Icn = Ics | Confirm against the prospective short-circuit current at the installation point |
| Pole arrangement | 1P / 2P / 3P / 4P | Match supply system and local switching or isolation rules |
| Installation interface | DIN-rail installation | Check enclosure, rail/base, terminal and conductor compatibility |
Breaking Capacity
4.5kA Icn = Ics is the published product value. Confirm the prospective short-circuit current at the installation point.
Trip and Load Behaviour
B / C / D is the available trip/protection option. Match it to load inrush and required disconnection performance.
Pole Configuration
Available arrangement: 1P / 2P / 3P / 4P. Confirm which conductors must be switched and protected under local rules.
MCB or RCBO
An MCB does not replace residual-current protection where an RCD or RCBO is required.
Ordering Guide
- Specify the exact model: PXB2-63.
- State the required current rating within 6A–63A.
- Confirm pole arrangement: 1P / 2P / 3P / 4P.
- Confirm trip or protection option: B / C / D.
- Provide system voltage, expected fault level, destination market, quantity and any document requirements.
Installation and Coordination Checks
- Verify conductor material and cross-section against the circuit calculation and the published terminal range.
- Confirm the prospective short-circuit current does not exceed the applicable breaking rating.
- Check upstream/downstream coordination, enclosure temperature, grouping, altitude and required clearances.
- Installation, isolation, testing and maintenance must be carried out by qualified personnel under applicable rules.
Type designation
Tripping curves
Dimensions(mm)
Technical Specifications
| Parameter | |
| Rated Insulation Voltage | 500V |
| Rated Impulse Withstand Voltage | 4000V |
| Rated Current(A) | 6,10,16,20,25,32,40,50,63 |
| Rated Frequency | 50Hz / 60Hz |
| Number of Poles | 1P, 2P, 3P,4P |
| Rated Short-Circuit Capacity Icn (A) | 4500A |
| Service Short-Circuit Capacity Ics (A) | 4500A |
| Mechanical and Electrical Endurance (cycles) | Mechanical≥10000, Electrical≥10000 |
| Instantaneous Tripping Types | B,C, D |
| Grip Distance | 45mm |
| Protection Degree | IP20 |
| Standards Compliance | IEC60898-1, GB/ T10963.1 |
| Certification | CCC |
Tripping characteristics(Reference temperature 30℃)
| Item | Tripping Curve | Test current In(A) | Initial Status | Time limit for tripping or non-tripping | Expected result | Remarks |
| a | B, C, D | 1.13In | Cold | t ≤ 1h | Non-tripping | Current smoothly rises to specified value within 5s |
| b | B, C, D | 1.45In | Following item a test | t < 1h | Tripping | |
| c | B, C, D | 2.55In | Cold | 1s < t < 60s (In ≤ 32A) 1s < t < 120s (In > 32A) |
Tripping | |
| d | B | 3In | Cold | t ≤ 0.1s | Non-tripping | Switch on the power supply by closing the auxiliary switch |
| C | 5In | |||||
| D | 10In | |||||
| e | B | 5In | Cold | t < 0.1s | Tripping | Switch on the power supply by closing the auxiliary switch |
| C | 10In | |||||
| D | 20In |
Note: The term “cold” means that the test is carried out at a reference calibration temperature without load before the test.
Conductor requirements and cross section
| Copper cross-section(mm2) | Rated current In(A) |
| 1 | In≤6 |
| 1.5 | 6<In≤13 |
| 2.5 | 13<In≤20 |
| 4 | 20<In≤25 |
| 6 | 25<In≤32 |
| 10 | 32<In≤50 |
| 16 | 50<In≤63 |
Why Choose CHAC
With 30+ years of manufacturing experience, 1100+ employees, 100M+ poles
annual capacity and 90% automated production, CHAC provides stable production capacity and strict
quality control for global OEM/ODM customers. Our in-house manufacturing system supports long-term
cooperation for electrical brands, importers and distributors.
30+
YEARS EXPERIENCE
Specialized in low-voltage electrical manufacturing
1100+
EMPLOYEES
Professional team ensures stable quality and delivery
100M+
POLES ANNUAL CAPACITY
Large-scale production capacity to meet global demand
90%
AUTOMATED PRODUCTION
Advanced automation for high efficiency and consistency
Automated Assembly Line
Testing Laboratory
Injection & Stamping
Quality Inspection
Strict quality control system ensures every product meets global standards.
What Can We Customize?
For PXB2-63 projects, CHAC can review private-label marking, packaging, appearance, available electrical configurations and technical-document requirements. Requests outside the published range are subject to engineering evaluation, testing, MOQ and project feasibility.
Logo & Branding
Private-label marking and nameplate options are subject to artwork review and sample approval.
Packaging
Customization
Cartons, labels and manuals can be prepared for the approved order specification and destination market.
Electrical
Customization
Select from the published 6A–63A, 1P / 2P / 3P / 4P and B / C / D options; non-standard requests require technical evaluation.
Product
Appearance
Appearance options can be reviewed subject to tooling, MOQ, marking requirements and technical feasibility.
Certification
Support
Datasheets, drawings and verified certificate information are supplied for the applicable approved configuration.
Engineering
Development
Project support may include drawing review, sample evaluation, testing and production planning, subject to technical approval.
Download
PXB2 Series Miniature Circuit Breaker
Complete product overview for low-voltage electrical components and product selection reference.
Need Technical Documents?
Contact us for datasheets, certificates, drawings, selection guidance or OEM/ODM project support.
PXB2-63 Product FAQ
What does 4.5kA mean on the PXB2-63 MCB?
It is the published short-circuit breaking-capacity value, stated as 4.5kA Icn = Ics. It does not describe normal load current or guarantee suitability at every installation point.
What does the kA rating tell you about PXB2-63?
kA means thousands of amperes of short-circuit current under the applicable test conditions. PXB2-63 rated-current options are separately published as 6A–63A.
Is a higher kA model always better than PXB2-63?
A higher verified rating may be needed where the prospective fault current is higher, but it is not a universal quality score. Select from fault level, coordination, standard, dimensions and project requirements.
Is 10kA the same as a 10,000A continuous current rating?
No. A 10kA value refers to short-circuit interruption, not continuous loading. The conductor and normal load must be matched to the breaker's ampere rating.
What is the difference between 4.5kA, 6kA and 10kA MCBs?
They state different short-circuit breaking capacities. The installation's prospective short-circuit current and coordination study determine the minimum acceptable duty; rated current and curve are separate choices.
How many watts can a 10A MCB supply?
Power cannot be determined from 10A alone; it depends on system voltage, phase arrangement, power factor, load behavior and applicable continuous-loading rules. The circuit and conductor must be designed together.
Confirm the Right PXB2-63 Configuration
Send your current rating, pole arrangement, trip option, system voltage, prospective fault level, destination market and quantity. CHAC will review the request against the published product range.
