CQB2H-63 Miniature Circuit Breaker
The CQB2H-63 miniature circuit breaker provides overload and short-circuit protection within the published 6A–63A range. Its verified product data lists 10kA Icn, 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
CQB2H-63 is a 10kA Icn 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. 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 | CQB2H-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 | 10kA Icn | 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
10kA Icn 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: CQB2H-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(unit:mm)
Technical Specifications
| Parameter | |
| Rated voltage | 230V/400V (1P), 400V~ (2P/3P/4P) |
| Rated current | 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Number of poles | 1P, 2P, 3P, 4P |
| Rated short circuit breaking capacity Icn | 10000 A |
| Mechanical & Electrical life | Mechanical ≥ 20000, Electrical ≥ 6000 |
| Tripping characteristics | B, C, D |
| Tightening torque (N·m) | 3.5 |
| Pollution degree | 2 |
| Degree of protection | IP20 |
| Overvoltage category | Ⅱ, Ⅲ |
| Standards | IEC 60898-1, GB/T 10963.1 |
Table1 Tripping characteristics (Reference temp.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 refererce 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 CQB2H-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
CQB2 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.
CQB2H-63 Product FAQ
What does 10kA mean on the CQB2H-63 MCB?
10kA is the published rated short-circuit breaking capacity, not the normal load current. It means the device's interrupting duty is stated as 10,000A under the applicable test conditions.
When is the 10kA CQB2H-63 the right choice?
Use a 10kA MCB only when the prospective short-circuit current and the protection-coordination study are within its published duty. A higher rating should not replace a fault-level calculation.
How should kA be interpreted on the CQB2H-63?
kA expresses short-circuit interrupting capacity in thousands of amperes. It is separate from the 6A–63A rated-current options used to select load and conductor protection.
Is 10kA the same as a 10,000A load rating?
No. The 10kA value relates to fault interruption. CQB2H-63 continuous rated-current choices remain within 6A–63A and must be coordinated with the conductor and design current.
What is the difference between a 10kA and 6kA MCB?
The main difference is the stated short-circuit breaking capacity. Choose between them from the prospective fault current, applicable standard, coordination requirements and verified product data—not from price or current rating alone.
Which CQB2H-63 curve and pole configuration should I choose?
CQB2H-63 is published with B, C and D curves and 1P–4P options. Match the curve to inrush and fault-clearing needs and match the poles to the supply, switching, neutral and isolation design.
Confirm the Right CQB2H-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.
